What are the photon energy bands of these 3 effects?

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Offline jeffreyH

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I am looking for information on the photon energy bands involved in the photoelectric effect, Compton scattering and pair production. Is there any overlap in these energy bands?
Fixation on the Einstein papers is a good definition of OCD.

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Offline chiralSPO

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Re: What are the photon energy bands of these 3 effects?
« Reply #1 on: 03/07/2015 13:57:29 »
The energy required for the photoelectric effect depends on the material that is being ionized (usually on the  a few eV--so mostly UV, with some materials being ionized by blue light, and some requiring X-rays.

Pair production requires significantly higher energies, for instance to produce an electron and positron pair would require gamma rays (at least 1 million eV total energy required). Forming a pair of neutrinos could fall into the UV range because their masses are so low, but otherwise I would say pair production requires photons many, many orders of magnitude more energetic than for the photoelectric effect.

I am not very familiar with Compton scattering, but I think it typically treats electrons as "free" so the energies involved must be at least the ionization of the material interacting with light (or the material must already be a plasma).
« Last Edit: 03/07/2015 13:59:19 by chiralSPO »

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Offline jeffreyH

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Re: What are the photon energy bands of these 3 effects?
« Reply #2 on: 03/07/2015 18:58:25 »
Thanks for the information. It gives me some avenues to pursue.
Fixation on the Einstein papers is a good definition of OCD.

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Offline jeffreyH

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Re: What are the photon energy bands of these 3 effects?
« Reply #3 on: 03/07/2015 20:28:28 »
I need some verification of a statement on wikipedia.

https://en.wikipedia.org/wiki/Planck_mass#Significance
[The Planck mass is nature’s maximum allowed mass for point-masses (quanta) – in other words, a mass capable of holding a single elementary charge. If two quanta of the Planck mass or greater met, they could spontaneously form a black hole whose Schwarzschild radius equals their Compton wavelength.]

It says this needs a citation so I'm very unsure about its veracity.
Fixation on the Einstein papers is a good definition of OCD.

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Offline jccc

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Re: What are the photon energy bands of these 3 effects?
« Reply #4 on: 06/07/2015 06:35:09 »
find out who invented those theories/ideas, ask them.

who else know better?