|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
The photographic medium Joe Public isn't allowed to buy
Neutron imaging!!
https://en.wikipedia.org/wiki/Neutron_imaging However, Muon imagers may at some point be available, they are used now to x-ray vehicles in border crossings and muons are free, since they come from space. |
#2
|
|||
|
|||
The photographic medium Joe Public isn't allowed to buy
On Friday, 16 March 2018 09:26:49 UTC+1, RichA wrote:
Neutron imaging!! https://en.wikipedia.org/wiki/Neutron_imaging However, Muon imagers may at some point be available, they are used now to x-ray vehicles in border crossings and muons are free, since they come from space. Go on then, I'll bite. Why do you want to do neutron or muon imaging? |
#3
|
|||
|
|||
The photographic medium Joe Public isn't allowed to buy
Neutrons change atomic nuclei.
So when you do a contact neutron print of a frog, the poor frog is radioactive afterwards. Contact printing, with a point source of neutrons, is possible. Since one can't bring neutrons to a focus, astronomical imaging with them will be... awkward. |
#4
|
|||
|
|||
The photographic medium Joe Public isn't allowed to buy
On Fri, 16 Mar 2018 17:16:25 -0700 (PDT), Quadibloc
wrote: Neutrons change atomic nuclei. So when you do a contact neutron print of a frog, the poor frog is radioactive afterwards. Contact printing, with a point source of neutrons, is possible. Since one can't bring neutrons to a focus, astronomical imaging with them will be... awkward. Neutron optics exist, which utilize reflection, diffraction, refraction, absorption, and magnetic interactions. Modern neutron sources used for imaging are routinely focused. So I'm not sure that astronomical imaging opportunities are excluded. |
#5
|
|||
|
|||
The photographic medium Joe Public isn't allowed to buy
On Friday, March 16, 2018 at 6:52:58 PM UTC-6, Chris L Peterson wrote:
On Fri, 16 Mar 2018 17:16:25 -0700 (PDT), Quadibloc wrote: Neutrons change atomic nuclei. So when you do a contact neutron print of a frog, the poor frog is radioactive afterwards. Contact printing, with a point source of neutrons, is possible. Since one can't bring neutrons to a focus, astronomical imaging with them will be... awkward. Neutron optics exist, which utilize reflection, diffraction, refraction, absorption, and magnetic interactions. Modern neutron sources used for imaging are routinely focused. So I'm not sure that astronomical imaging opportunities are excluded. Since the half-life of free neutrons is about 15 minutes, neutron imaging would be useful only within the solar system. |
#6
|
|||
|
|||
The photographic medium Joe Public isn't allowed to buy
On Sun, 18 Mar 2018 04:59:03 -0700 (PDT), Gary Harnagel
wrote: Since the half-life of free neutrons is about 15 minutes, neutron imaging would be useful only within the solar system. Neutrons are created when cosmic rays strike particles in the atmosphere, so they could potentially be used as tools in imaging cosmic ray sources. But my point was that neutrons can be focused if an application requires it. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Photographic All-Sky Survey | Quadibloc | Amateur Astronomy | 2 | May 14th 11 07:34 AM |
Photographic All-Sky Survey | Davoud[_1_] | Amateur Astronomy | 0 | May 13th 11 06:59 PM |
Photographic All-Sky Survey | Ben[_2_] | Astronomy Misc | 1 | May 13th 11 04:22 AM |
photographic tripod for binoculars | brucegooglegroups | Amateur Astronomy | 7 | November 2nd 06 08:43 PM |