Questions tagged [gamma-rays]
Electromagnetic radiation with high energies and a typcial wavelength of less than 10 picometers.
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Who - if anyone - predicted the emission of gamma rays from jetted active galaxies? An historiographical inquiry
We know that the relativistic electrons that produce synchrotron radiation in the jets of active galaxies also produce gamma radiation via the inverse Compton mechanism (in the most simple scenario ...
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Could a single gamma ray photon break the Schwinger limit? If so, at what energy?
Is it possible for a ray of light, or even a single photon, to 'break' the vacuum of space?
If so, at what energies (in eV, e.g.) would this happen?
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Which exact element makes Spent Nuclear Fuel dangerous?
I understand that beta and gamma emissions are what makes the decay of a radioisotope dangerous. However, U-238, which is what SNF is mostly made of, doesn't emit gamma or beta particles frequently ...
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Do gamma rays not follow the Beer-Lambert law?
I was looking at an info table for radionuclides, and it said that for F-18, the 511keV gamma rays have a 1st half-value layer of 7mm, and a 2nd half-value layer of around 4mm (Edit: in lead). Why is ...
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GRB 221009A Comparison with solar flare NOOA scale
I'm trying to found a comparison of the energy received on Earth by GRB 221009A in comparison of various solar flares based on NOAA Space Weather Scales (or other).
I failed to find any comparison (...
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Why can gamma rays penetrate a thick layer of lead and why can't a beta particle penetrate a thin sheet of aluminum?
This might be a stupid question, but, why is it that gamma rays are able to penetrate almost any barrier without question? We know that gamma rays are simply high frequency waves with massive amounts ...
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Gamma Ray Emission in the Wu Experiment
In the classic Wu experiment (https://doi.org/10.1103/PhysRev.105.1413) parity violation was discovered in the weak interaction through the asymmetry in the distribution of electrons in the beta decay ...
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Compton Scattering Angle Distribution, and the Klein-Nishina Model
I have a Geant4 simulation where 662keV photons are going into a detecting volume (Germanium). As expected, when I look at the output of the simulation, these photons undergo Compton scattering and ...
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If I sent a sample of U238 to the upper atmosphere
If I sent a sample of U238 to the upper atmosphere, would the solar gamma rays be sufficient enough to cause photodisintegration and the subsequent production of Np237?
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How close would a evaporating primodial black hole be to be detected? [closed]
The power output of a black holes hawking radiation is inversely proportional to the square of it's mass. According to here, in it's final second of existence, it'll emit over 2E22 joules of energy, ...
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Gamma Spectroscopy Scintillator for X-ray Fluorescence
I have been reading into X-ray and gamma spectroscopy. I have found that they can both be done with scintillation detectors and work off similar principles.
That is to say that when a sample is ...
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Potential yields of Np-237 using a synchotron
U238 releases a neutron when it is exposed to photons of around 11 MeV, and the resulting U237 promptly decays into the fissile Np237.
In such a situation, what equations can I use to relate the ...
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Count vs Count-per-channel
Hi there Wise people of the internet,
I am trying to do analysis some data gathered from a gamma scintillator setup, its stored in root.
So i have to do some coincidence measurements, and i found that ...
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Where are the Gamma rays in Beryllium-7 decay coming from? [closed]
Beryllium-7 decays via electron capture.
This gives of Neutrino and later a Auger electron/Extreme ultraviolet photon.
So where does the Gamma rays that occur 10% of time according to here come from?
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Energy of an x-ray generated by cathode ray
I'm trying to understand if I could capture the event of generation of an electron positron pair from a gamma ray inside a cloud chamber. So far I've been thinking of using a cathode ray tube as a ...
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