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Muon Decay Experiments



 
 
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  #1  
Old January 10th 09, 06:54 AM posted to sci.physics.relativity,sci.physics,fr.sci.physique,fr.sci.astrophysique,sci.astro
Pentcho Valev
external usenet poster
 
Posts: 8,078
Default Muon Decay Experiments

On Jan 9, 8:26*pm, maxwell wrote in
sci.physics.relativity:
The relative times for the average decay rates of high-speed muons
versus low-speed muons appears to be the only actual experimental
evidence for the time expansion predictions of special relativity.
There seem to be quite a few experiments MEASURING the decays of high-
speed muons and these are usually contrasted with the CALCULATED times
of stationary muon decays using the LT formula. *This is not evidence
for SRT but an example of 'begging the question'.
My question to all readers is this: *Can anyone give any references
(preferably accessible online) to ACTUAL experiments were decay times
of stationary (or low-speed ) muons were actually measured?


Einsteiniana's most pernicious hoax is undoubtedly the muon hoax. It
is based on measuring the lifetime of muons "at rest" ("stationary"
muons). When cosmic-ray muons bump into an obstacle so that their
speed instantly changes from about 300000km/s to zero, their forced
and quick disintegration makes Einsteinians sing "Divine Einstein" and
go into convulsions. Why? Simply because in Einstein zombie world
human rationality is so devastated that, while the muon undergoes such
a terrible crash, Einsteinians safely declare that in fact this muon
is "at rest" and, in perfect accordance with Divine Albert's Divine
Theory, being "at rest", the muon disintegrates more quickly than
another muon that is not "at rest" (that is, the other muon is not
involved in a crash):

http://websci.smith.edu/~pdecowsk/muons.html
"The purpose of this experiment is to measure life time of muons
decaying at rest. Muons, produced in the atmoshere bombarded by high
energy cosmic radiation, are passing through the system of two
detectors located one above the other one. A coincidence of signals
from these two detectors (signals occuring in both detectors within
100ns) marks a particle entering the muon telescope from above and
serves as a filter rejecting many noninteresting signals from
background radiation. Some particles, with appropriate energies, will
end their flight in the lower detector (proper amount of lead between
both detectors ensures that many of them will be muons). If a stopped
particle is muon, it will decay after some time producing electron.
The time interval between signals from the muon entering the lower
detector and the electron emerging after its decay is converted by a
time-to-amplitude converter into amplitude of signal fed to the CAMAC
analog-to-digital converter (ADC) controlled by the computer. The
spectrum of time intervals is displayed in the figure below. The
expected distribution should be exponential with the exponential time
constant being the average life time of muon. The full range of the
spectrum (about channel 2000) corresponds to the time interval of
about 25 microsecond. There are not many muons with such energies that
they will end their path exactly in the lower detector (usually they
will pass both detectors and will be stopped in somewhere in the
ground), so counting rate is rather low. To collect a reasonable
number of events, the experiment has to be run a number of days."

Pentcho Valev

  #2  
Old January 12th 09, 08:00 PM posted to sci.physics.relativity,sci.physics,fr.sci.physique,fr.sci.astrophysique,sci.astro
maxwell
external usenet poster
 
Posts: 34
Default Muon Decay Experiments

On Jan 9, 10:54*pm, Pentcho Valev wrote:
On Jan 9, 8:26*pm, maxwell wrote in
sci.physics.relativity:

The relative times for the average decay rates of high-speed muons
versus low-speed muons appears to be the only actual experimental
evidence for the time expansion predictions of special relativity.
There seem to be quite a few experiments MEASURING the decays of high-
speed muons and these are usually contrasted with the CALCULATED times
of stationary muon decays using the LT formula. *This is not evidence
for SRT but an example of 'begging the question'.
My question to all readers is this: *Can anyone give any references
(preferably accessible online) to ACTUAL experiments were decay times
of stationary (or low-speed ) muons were actually measured?


Einsteiniana's most pernicious hoax is undoubtedly the muon hoax. It
is based on measuring the lifetime of muons "at rest" ("stationary"
muons). When cosmic-ray muons bump into an obstacle so that their
speed instantly changes from about 300000km/s to zero, their forced
and quick disintegration makes Einsteinians sing "Divine Einstein" and
go into convulsions. Why? Simply because in Einstein zombie world
human rationality is so devastated that, while the muon undergoes such
a terrible crash, Einsteinians safely declare that in fact this muon
is "at rest" and, in perfect accordance with Divine Albert's Divine
Theory, being "at rest", the muon disintegrates more quickly than
another muon that is not "at rest" (that is, the other muon is not
involved in a crash):

http://websci.smith.edu/~pdecowsk/muons.html
"The purpose of this experiment is to measure life time of muons
decaying at rest. Muons, produced in the atmoshere bombarded by high
energy cosmic radiation, are passing through the system of two
detectors located one above the other one. A coincidence of signals
from these two detectors (signals occuring in both detectors within
100ns) marks a particle entering the muon telescope from above and
serves as a filter rejecting many noninteresting signals from
background radiation. Some particles, with appropriate energies, will
end their flight in the lower detector (proper amount of lead between
both detectors ensures that many of them will be muons). If a stopped
particle is muon, it will decay after some time producing electron.
The time interval between signals from the muon entering the lower
detector and the electron emerging after its decay is converted by a
time-to-amplitude converter into amplitude of signal fed to the CAMAC
analog-to-digital converter (ADC) controlled by the computer. The
spectrum of time intervals is displayed in the figure below. The
expected distribution should be exponential with the exponential time
constant being the average life time of muon. The full range of the
spectrum (about channel 2000) corresponds to the time interval of
about 25 microsecond. There are not many muons with such energies that
they will end their path exactly in the lower detector (usually they
will pass both detectors and will be stopped in somewhere in the
ground), so counting rate is rather low. To collect a reasonable
number of events, the experiment has to be run a number of days."

Pentcho Valev

Thanks for making this point explicitly. Until physics has a theory
of muon decay we cannot say that relative external influences on the
muon are not important in determining its average decay rates. In
other words, muon decay interactions and THEREFORE decay rates may be
a direct function of velocity (relative to the lab or measurement
setup) and all of these measured time variations may have no
relationship to SRT.
  #3  
Old January 12th 09, 08:04 PM posted to sci.physics.relativity,sci.physics,fr.sci.physique,fr.sci.astrophysique,sci.astro
Strich.9[_2_]
external usenet poster
 
Posts: 31
Default Muon Decay Experiments

On Jan 12, 3:00*pm, maxwell wrote:
On Jan 9, 10:54*pm, Pentcho Valev wrote:



On Jan 9, 8:26*pm, maxwell wrote in
sci.physics.relativity:


The relative times for the average decay rates of high-speed muons
versus low-speed muons appears to be the only actual experimental
evidence for the time expansion predictions of special relativity.
There seem to be quite a few experiments MEASURING the decays of high-
speed muons and these are usually contrasted with the CALCULATED times
of stationary muon decays using the LT formula. *This is not evidence
for SRT but an example of 'begging the question'.
My question to all readers is this: *Can anyone give any references
(preferably accessible online) to ACTUAL experiments were decay times
of stationary (or low-speed ) muons were actually measured?


Einsteiniana's most pernicious hoax is undoubtedly the muon hoax. It
is based on measuring the lifetime of muons "at rest" ("stationary"
muons). When cosmic-ray muons bump into an obstacle so that their
speed instantly changes from about 300000km/s to zero, their forced
and quick disintegration makes Einsteinians sing "Divine Einstein" and
go into convulsions. Why? Simply because in Einstein zombie world
human rationality is so devastated that, while the muon undergoes such
a terrible crash, Einsteinians safely declare that in fact this muon
is "at rest" and, in perfect accordance with Divine Albert's Divine
Theory, being "at rest", the muon disintegrates more quickly than
another muon that is not "at rest" (that is, the other muon is not
involved in a crash):


http://websci.smith.edu/~pdecowsk/muons.html
"The purpose of this experiment is to measure life time of muons
decaying at rest. Muons, produced in the atmoshere bombarded by high
energy cosmic radiation, are passing through the system of two
detectors located one above the other one. A coincidence of signals
from these two detectors (signals occuring in both detectors within
100ns) marks a particle entering the muon telescope from above and
serves as a filter rejecting many noninteresting signals from
background radiation. Some particles, with appropriate energies, will
end their flight in the lower detector (proper amount of lead between
both detectors ensures that many of them will be muons). If a stopped
particle is muon, it will decay after some time producing electron.
The time interval between signals from the muon entering the lower
detector and the electron emerging after its decay is converted by a
time-to-amplitude converter into amplitude of signal fed to the CAMAC
analog-to-digital converter (ADC) controlled by the computer. The
spectrum of time intervals is displayed in the figure below. The
expected distribution should be exponential with the exponential time
constant being the average life time of muon. The full range of the
spectrum (about channel 2000) corresponds to the time interval of
about 25 microsecond. There are not many muons with such energies that
they will end their path exactly in the lower detector (usually they
will pass both detectors and will be stopped in somewhere in the
ground), so counting rate is rather low. To collect a reasonable
number of events, the experiment has to be run a number of days."


Pentcho Valev


Thanks for making this point explicitly. *Until physics has a theory
of muon decay we cannot say that relative external influences on the
muon are not important in determining its average decay rates. *In
other words, muon decay interactions and THEREFORE decay rates may be
a direct function of velocity (relative to the lab or measurement
setup) and all of these measured time variations may have no
relationship to SRT.- Hide quoted text -

- Show quoted text -


A magician cannot do his tricks without help from somebody in the
audience.

And this somebody would really need to convince everybody that he is
just really part of the audience...
  #4  
Old January 12th 09, 08:07 PM posted to sci.physics.relativity,sci.physics,fr.sci.physique,sci.astro
Androcles[_8_]
external usenet poster
 
Posts: 1,135
Default Muon Decay Experiments


"Strich.9" wrote in message
...
On Jan 12, 3:00 pm, maxwell wrote:
On Jan 9, 10:54 pm, Pentcho Valev wrote:



On Jan 9, 8:26 pm, maxwell wrote in
sci.physics.relativity:


The relative times for the average decay rates of high-speed muons
versus low-speed muons appears to be the only actual experimental
evidence for the time expansion predictions of special relativity.
There seem to be quite a few experiments MEASURING the decays of high-
speed muons and these are usually contrasted with the CALCULATED times
of stationary muon decays using the LT formula. This is not evidence
for SRT but an example of 'begging the question'.
My question to all readers is this: Can anyone give any references
(preferably accessible online) to ACTUAL experiments were decay times
of stationary (or low-speed ) muons were actually measured?


Einsteiniana's most pernicious hoax is undoubtedly the muon hoax. It
is based on measuring the lifetime of muons "at rest" ("stationary"
muons). When cosmic-ray muons bump into an obstacle so that their
speed instantly changes from about 300000km/s to zero, their forced
and quick disintegration makes Einsteinians sing "Divine Einstein" and
go into convulsions. Why? Simply because in Einstein zombie world
human rationality is so devastated that, while the muon undergoes such
a terrible crash, Einsteinians safely declare that in fact this muon
is "at rest" and, in perfect accordance with Divine Albert's Divine
Theory, being "at rest", the muon disintegrates more quickly than
another muon that is not "at rest" (that is, the other muon is not
involved in a crash):


http://websci.smith.edu/~pdecowsk/muons.html
"The purpose of this experiment is to measure life time of muons
decaying at rest. Muons, produced in the atmoshere bombarded by high
energy cosmic radiation, are passing through the system of two
detectors located one above the other one. A coincidence of signals
from these two detectors (signals occuring in both detectors within
100ns) marks a particle entering the muon telescope from above and
serves as a filter rejecting many noninteresting signals from
background radiation. Some particles, with appropriate energies, will
end their flight in the lower detector (proper amount of lead between
both detectors ensures that many of them will be muons). If a stopped
particle is muon, it will decay after some time producing electron.
The time interval between signals from the muon entering the lower
detector and the electron emerging after its decay is converted by a
time-to-amplitude converter into amplitude of signal fed to the CAMAC
analog-to-digital converter (ADC) controlled by the computer. The
spectrum of time intervals is displayed in the figure below. The
expected distribution should be exponential with the exponential time
constant being the average life time of muon. The full range of the
spectrum (about channel 2000) corresponds to the time interval of
about 25 microsecond. There are not many muons with such energies that
they will end their path exactly in the lower detector (usually they
will pass both detectors and will be stopped in somewhere in the
ground), so counting rate is rather low. To collect a reasonable
number of events, the experiment has to be run a number of days."


Pentcho Valev


Thanks for making this point explicitly. Until physics has a theory
of muon decay we cannot say that relative external influences on the
muon are not important in determining its average decay rates. In
other words, muon decay interactions and THEREFORE decay rates may be
a direct function of velocity (relative to the lab or measurement
setup) and all of these measured time variations may have no
relationship to SRT.- Hide quoted text -

- Show quoted text -


A magician cannot do his tricks without help from somebody in the
audience.
==============================================
Aww... c'mon. That's an easily disproved statement. Your knee-jerk
reactions are not doing you much good.






And this somebody would really need to convince everybody that he is
just really part of the audience...


  #5  
Old January 14th 09, 10:17 PM posted to sci.physics.relativity,sci.physics,fr.sci.physique,fr.sci.astrophysique,sci.astro
maxwell
external usenet poster
 
Posts: 34
Default Muon Decay Experiments

On Jan 12, 12:04*pm, "Strich.9" wrote:
On Jan 12, 3:00*pm, maxwell wrote:



On Jan 9, 10:54*pm, Pentcho Valev wrote:


On Jan 9, 8:26*pm, maxwell wrote in
sci.physics.relativity:


The relative times for the average decay rates of high-speed muons
versus low-speed muons appears to be the only actual experimental
evidence for the time expansion predictions of special relativity.
There seem to be quite a few experiments MEASURING the decays of high-
speed muons and these are usually contrasted with the CALCULATED times
of stationary muon decays using the LT formula. *This is not evidence
for SRT but an example of 'begging the question'.
My question to all readers is this: *Can anyone give any references
(preferably accessible online) to ACTUAL experiments were decay times
of stationary (or low-speed ) muons were actually measured?


Einsteiniana's most pernicious hoax is undoubtedly the muon hoax. It
is based on measuring the lifetime of muons "at rest" ("stationary"
muons). When cosmic-ray muons bump into an obstacle so that their
speed instantly changes from about 300000km/s to zero, their forced
and quick disintegration makes Einsteinians sing "Divine Einstein" and
go into convulsions. Why? Simply because in Einstein zombie world
human rationality is so devastated that, while the muon undergoes such
a terrible crash, Einsteinians safely declare that in fact this muon
is "at rest" and, in perfect accordance with Divine Albert's Divine
Theory, being "at rest", the muon disintegrates more quickly than
another muon that is not "at rest" (that is, the other muon is not
involved in a crash):


http://websci.smith.edu/~pdecowsk/muons.html
"The purpose of this experiment is to measure life time of muons
decaying at rest. Muons, produced in the atmoshere bombarded by high
energy cosmic radiation, are passing through the system of two
detectors located one above the other one. A coincidence of signals
from these two detectors (signals occuring in both detectors within
100ns) marks a particle entering the muon telescope from above and
serves as a filter rejecting many noninteresting signals from
background radiation. Some particles, with appropriate energies, will
end their flight in the lower detector (proper amount of lead between
both detectors ensures that many of them will be muons). If a stopped
particle is muon, it will decay after some time producing electron.
The time interval between signals from the muon entering the lower
detector and the electron emerging after its decay is converted by a
time-to-amplitude converter into amplitude of signal fed to the CAMAC
analog-to-digital converter (ADC) controlled by the computer. The
spectrum of time intervals is displayed in the figure below. The
expected distribution should be exponential with the exponential time
constant being the average life time of muon. The full range of the
spectrum (about channel 2000) corresponds to the time interval of
about 25 microsecond. There are not many muons with such energies that
they will end their path exactly in the lower detector (usually they
will pass both detectors and will be stopped in somewhere in the
ground), so counting rate is rather low. To collect a reasonable
number of events, the experiment has to be run a number of days."


Pentcho Valev


Thanks for making this point explicitly. *Until physics has a theory
of muon decay we cannot say that relative external influences on the
muon are not important in determining its average decay rates. *In
other words, muon decay interactions and THEREFORE decay rates may be
a direct function of velocity (relative to the lab or measurement
setup) and all of these measured time variations may have no
relationship to SRT.- Hide quoted text -


- Show quoted text -


A magician cannot do his tricks without help from somebody in the
audience.

And this somebody would really need to convince everybody that he is
just really part of the audience...


Since muons are the result of pion decays, which are themselves
products of higher structure decays, they would appear to be a very
poor candidate for the role of clocks, especially as they always
appear briefly in high-speed situations. Unlike long-lived isotopes,
such as C14, muoms cannot be prepared 'at rest' in the lab frame
without imposing violent deceleration interventions, with unknown
results.
Can someone propose a better experimental test of the LT time dilation
effect that does NOT involve acceleration?
  #6  
Old January 15th 09, 02:33 AM posted to sci.physics.relativity,sci.physics,fr.sci.physique,fr.sci.astrophysique,sci.astro
Tom Roberts
external usenet poster
 
Posts: 344
Default Muon Decay Experiments

maxwell wrote:
Can someone propose a better experimental test of the LT time dilation
effect that does NOT involve acceleration?


One of the major lessons of a physics education is that nothing is ever
exact in the world we inhabit, and approximations must always be made
when discussing real phenomena. For instance, it simply is not possible
to measure the lifetime of muons without them ever having experienced
any acceleration. So instead, one measures the lifetime of many muons
while varying their velocity and acceleration. This has been done many
times by many different experimental groups; all of their results can be
summarized as follows:

A) The lifetime of a muon varies with speed v as 1/sqrt(1-v^2/c^2);
this is accurate to a few parts per million for ~0.01 v/c 1.

B) the lifetime of a muon is not affected by acceleration up to at
least 10^18 g (1 g = 9.8 m/s^2); this is accurate to about 1,000
parts per million at v/c = 0.999.

For details, go to http://pdg.lbl.gov. The above values
are from memory, and may be off a bit.

(B) implies that in the limit of zero acceleration, the muon lifetime is
is well described by (A).


Tom Roberts
  #7  
Old January 15th 09, 05:27 AM posted to sci.physics.relativity,sci.physics,fr.sci.physique,fr.sci.astrophysique,sci.astro
Sue...
external usenet poster
 
Posts: 237
Default Muon Decay Experiments

On Jan 14, 5:17*pm, maxwell wrote:
On Jan 12, 12:04*pm, "Strich.9" wrote:



On Jan 12, 3:00*pm, maxwell wrote:


On Jan 9, 10:54*pm, Pentcho Valev wrote:


On Jan 9, 8:26*pm, maxwell wrote in
sci.physics.relativity:


The relative times for the average decay rates of high-speed muons
versus low-speed muons appears to be the only actual experimental
evidence for the time expansion predictions of special relativity..
There seem to be quite a few experiments MEASURING the decays of high-
speed muons and these are usually contrasted with the CALCULATED times
of stationary muon decays using the LT formula. *This is not evidence
for SRT but an example of 'begging the question'.
My question to all readers is this: *Can anyone give any references
(preferably accessible online) to ACTUAL experiments were decay times
of stationary (or low-speed ) muons were actually measured?


Einsteiniana's most pernicious hoax is undoubtedly the muon hoax. It
is based on measuring the lifetime of muons "at rest" ("stationary"
muons). When cosmic-ray muons bump into an obstacle so that their
speed instantly changes from about 300000km/s to zero, their forced
and quick disintegration makes Einsteinians sing "Divine Einstein" and
go into convulsions. Why? Simply because in Einstein zombie world
human rationality is so devastated that, while the muon undergoes such
a terrible crash, Einsteinians safely declare that in fact this muon
is "at rest" and, in perfect accordance with Divine Albert's Divine
Theory, being "at rest", the muon disintegrates more quickly than
another muon that is not "at rest" (that is, the other muon is not
involved in a crash):


http://websci.smith.edu/~pdecowsk/muons.html
"The purpose of this experiment is to measure life time of muons
decaying at rest. Muons, produced in the atmoshere bombarded by high
energy cosmic radiation, are passing through the system of two
detectors located one above the other one. A coincidence of signals
from these two detectors (signals occuring in both detectors within
100ns) marks a particle entering the muon telescope from above and
serves as a filter rejecting many noninteresting signals from
background radiation. Some particles, with appropriate energies, will
end their flight in the lower detector (proper amount of lead between
both detectors ensures that many of them will be muons). If a stopped
particle is muon, it will decay after some time producing electron.
The time interval between signals from the muon entering the lower
detector and the electron emerging after its decay is converted by a
time-to-amplitude converter into amplitude of signal fed to the CAMAC
analog-to-digital converter (ADC) controlled by the computer. The
spectrum of time intervals is displayed in the figure below. The
expected distribution should be exponential with the exponential time
constant being the average life time of muon. The full range of the
spectrum (about channel 2000) corresponds to the time interval of
about 25 microsecond. There are not many muons with such energies that
they will end their path exactly in the lower detector (usually they
will pass both detectors and will be stopped in somewhere in the
ground), so counting rate is rather low. To collect a reasonable
number of events, the experiment has to be run a number of days."


Pentcho Valev


Thanks for making this point explicitly. *Until physics has a theory
of muon decay we cannot say that relative external influences on the
muon are not important in determining its average decay rates. *In
other words, muon decay interactions and THEREFORE decay rates may be
a direct function of velocity (relative to the lab or measurement
setup) and all of these measured time variations may have no
relationship to SRT.- Hide quoted text -


- Show quoted text -


A magician cannot do his tricks without help from somebody in the
audience.


And this somebody would really need to convince everybody that he is
just really part of the audience...


Since muons are the result of pion decays, which are themselves
products of higher structure decays, they would appear to be a very
poor candidate for the role of clocks, especially as they always
appear briefly in high-speed situations. *Unlike long-lived isotopes,
such as C14, muoms cannot be prepared 'at rest' in the lab frame
without imposing violent deceleration interventions, with unknown
results.
Can someone propose a better experimental test of the LT time dilation
effect that does NOT involve acceleration?


~the famous Lorentz transformation [] ensures that
the velocity of [particle] light is invariant
between different *inertial* frames, and also
reduces to the more familiar Galilean transform
in the limit $v \ll c$. ~
http://farside.ph.utexas.edu/teachin...s/node109.html

The particle light has never been observed.
http://nobelprize.org/nobel_prizes/p...icles/ekspong/

So that use of the Lorentz transform has never been
confirmed.

A Lorentz transformation or any other coordinate
transformation will convert electric or magnetic
fields into mixtures of electric and magnetic fields,
but no transformation mixes them with the
gravitational [inertial by equivalence] field.
http://scitation.aip.org/journals/do..._11/31_1.shtml


Sue...






  #8  
Old January 15th 09, 02:04 PM posted to sci.physics.relativity,sci.physics,fr.sci.physique,fr.sci.astrophysique,sci.astro
Strich.9[_3_]
external usenet poster
 
Posts: 15
Default Muon Decay Experiments

On Jan 14, 5:17*pm, maxwell wrote:
On Jan 12, 12:04*pm, "Strich.9" wrote:





On Jan 12, 3:00*pm, maxwell wrote:


On Jan 9, 10:54*pm, Pentcho Valev wrote:


On Jan 9, 8:26*pm, maxwell wrote in
sci.physics.relativity:


The relative times for the average decay rates of high-speed muons
versus low-speed muons appears to be the only actual experimental
evidence for the time expansion predictions of special relativity..
There seem to be quite a few experiments MEASURING the decays of high-
speed muons and these are usually contrasted with the CALCULATED times
of stationary muon decays using the LT formula. *This is not evidence
for SRT but an example of 'begging the question'.
My question to all readers is this: *Can anyone give any references
(preferably accessible online) to ACTUAL experiments were decay times
of stationary (or low-speed ) muons were actually measured?


Einsteiniana's most pernicious hoax is undoubtedly the muon hoax. It
is based on measuring the lifetime of muons "at rest" ("stationary"
muons). When cosmic-ray muons bump into an obstacle so that their
speed instantly changes from about 300000km/s to zero, their forced
and quick disintegration makes Einsteinians sing "Divine Einstein" and
go into convulsions. Why? Simply because in Einstein zombie world
human rationality is so devastated that, while the muon undergoes such
a terrible crash, Einsteinians safely declare that in fact this muon
is "at rest" and, in perfect accordance with Divine Albert's Divine
Theory, being "at rest", the muon disintegrates more quickly than
another muon that is not "at rest" (that is, the other muon is not
involved in a crash):


http://websci.smith.edu/~pdecowsk/muons.html
"The purpose of this experiment is to measure life time of muons
decaying at rest. Muons, produced in the atmoshere bombarded by high
energy cosmic radiation, are passing through the system of two
detectors located one above the other one. A coincidence of signals
from these two detectors (signals occuring in both detectors within
100ns) marks a particle entering the muon telescope from above and
serves as a filter rejecting many noninteresting signals from
background radiation. Some particles, with appropriate energies, will
end their flight in the lower detector (proper amount of lead between
both detectors ensures that many of them will be muons). If a stopped
particle is muon, it will decay after some time producing electron.
The time interval between signals from the muon entering the lower
detector and the electron emerging after its decay is converted by a
time-to-amplitude converter into amplitude of signal fed to the CAMAC
analog-to-digital converter (ADC) controlled by the computer. The
spectrum of time intervals is displayed in the figure below. The
expected distribution should be exponential with the exponential time
constant being the average life time of muon. The full range of the
spectrum (about channel 2000) corresponds to the time interval of
about 25 microsecond. There are not many muons with such energies that
they will end their path exactly in the lower detector (usually they
will pass both detectors and will be stopped in somewhere in the
ground), so counting rate is rather low. To collect a reasonable
number of events, the experiment has to be run a number of days."


Pentcho Valev


Thanks for making this point explicitly. *Until physics has a theory
of muon decay we cannot say that relative external influences on the
muon are not important in determining its average decay rates. *In
other words, muon decay interactions and THEREFORE decay rates may be
a direct function of velocity (relative to the lab or measurement
setup) and all of these measured time variations may have no
relationship to SRT.- Hide quoted text -


- Show quoted text -


A magician cannot do his tricks without help from somebody in the
audience.


And this somebody would really need to convince everybody that he is
just really part of the audience...


Since muons are the result of pion decays, which are themselves
products of higher structure decays, they would appear to be a very
poor candidate for the role of clocks, especially as they always
appear briefly in high-speed situations. *Unlike long-lived isotopes,
such as C14, muoms cannot be prepared 'at rest' in the lab frame
without imposing violent deceleration interventions, with unknown
results.
Can someone propose a better experimental test of the LT time dilation
effect that does NOT involve acceleration?- Hide quoted text -

- Show quoted text -


No need. The whole concept is illogical and unsound.
  #9  
Old January 15th 09, 02:05 PM posted to sci.physics.relativity,sci.physics,fr.sci.physique,fr.sci.astrophysique,sci.astro
Strich.9[_3_]
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Posts: 15
Default Muon Decay Experiments

On Jan 14, 9:33*pm, Tom Roberts wrote:
A) The lifetime of a muon varies with speed v as 1/sqrt(1-v^2/c^2);
* * this is accurate to a few parts per million for ~0.01 v/c 1.



NO PROOF IDIOT. Stop reciting verses from your bible.
  #10  
Old January 15th 09, 02:21 PM posted to sci.physics.relativity,sci.physics,fr.sci.physique,fr.sci.astrophysique,sci.astro
RustyJames
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Posts: 26
Default Muon Decay Experiments

On Jan 14, 3:17*pm, maxwell wrote:
On Jan 12, 12:04*pm, "Strich.9" wrote:





On Jan 12, 3:00*pm, maxwell wrote:


On Jan 9, 10:54*pm, Pentcho Valev wrote:


On Jan 9, 8:26*pm, maxwell wrote in
sci.physics.relativity:


The relative times for the average decay rates of high-speed muons
versus low-speed muons appears to be the only actual experimental
evidence for the time expansion predictions of special relativity..
There seem to be quite a few experiments MEASURING the decays of high-
speed muons and these are usually contrasted with the CALCULATED times
of stationary muon decays using the LT formula. *This is not evidence
for SRT but an example of 'begging the question'.
My question to all readers is this: *Can anyone give any references
(preferably accessible online) to ACTUAL experiments were decay times
of stationary (or low-speed ) muons were actually measured?


Einsteiniana's most pernicious hoax is undoubtedly the muon hoax. It
is based on measuring the lifetime of muons "at rest" ("stationary"
muons). When cosmic-ray muons bump into an obstacle so that their
speed instantly changes from about 300000km/s to zero, their forced
and quick disintegration makes Einsteinians sing "Divine Einstein" and
go into convulsions. Why? Simply because in Einstein zombie world
human rationality is so devastated that, while the muon undergoes such
a terrible crash, Einsteinians safely declare that in fact this muon
is "at rest" and, in perfect accordance with Divine Albert's Divine
Theory, being "at rest", the muon disintegrates more quickly than
another muon that is not "at rest" (that is, the other muon is not
involved in a crash):


http://websci.smith.edu/~pdecowsk/muons.html
"The purpose of this experiment is to measure life time of muons
decaying at rest. Muons, produced in the atmoshere bombarded by high
energy cosmic radiation, are passing through the system of two
detectors located one above the other one. A coincidence of signals
from these two detectors (signals occuring in both detectors within
100ns) marks a particle entering the muon telescope from above and
serves as a filter rejecting many noninteresting signals from
background radiation. Some particles, with appropriate energies, will
end their flight in the lower detector (proper amount of lead between
both detectors ensures that many of them will be muons). If a stopped
particle is muon, it will decay after some time producing electron.
The time interval between signals from the muon entering the lower
detector and the electron emerging after its decay is converted by a
time-to-amplitude converter into amplitude of signal fed to the CAMAC
analog-to-digital converter (ADC) controlled by the computer. The
spectrum of time intervals is displayed in the figure below. The
expected distribution should be exponential with the exponential time
constant being the average life time of muon. The full range of the
spectrum (about channel 2000) corresponds to the time interval of
about 25 microsecond. There are not many muons with such energies that
they will end their path exactly in the lower detector (usually they
will pass both detectors and will be stopped in somewhere in the
ground), so counting rate is rather low. To collect a reasonable
number of events, the experiment has to be run a number of days."


Pentcho Valev


Thanks for making this point explicitly. *Until physics has a theory
of muon decay we cannot say that relative external influences on the
muon are not important in determining its average decay rates. *In
other words, muon decay interactions and THEREFORE decay rates may be
a direct function of velocity (relative to the lab or measurement
setup) and all of these measured time variations may have no
relationship to SRT.- Hide quoted text -


- Show quoted text -


A magician cannot do his tricks without help from somebody in the
audience.


And this somebody would really need to convince everybody that he is
just really part of the audience...


Since muons are the result of pion decays, which are themselves
products of higher structure decays, they would appear to be a very
poor candidate for the role of clocks, especially as they always
appear briefly in high-speed situations. *Unlike long-lived isotopes,
such as C14, muoms cannot be prepared 'at rest' in the lab frame
without imposing violent deceleration interventions, with unknown
results.
Can someone propose a better experimental test of the LT time dilation
effect that does NOT involve acceleration?- Hide quoted text -

- Show quoted text -


accidental signals distort the time histogram of muon decay so their
are isitope particles better suited for expeiramentation as internal
clock frame refrance that are easeir to calculate radiactive decay
cycle to show wheight change over X amount of time wrt velocity.
 




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