Questions tagged [gamma-rays]

Electromagnetic radiation with high energies and a typcial wavelength of less than 10 picometers.

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Variation of gamma line broadening with time of the source

What explains the broadening of the gamma linewidth as the source "gets old"? I have been using Iron-57 in my radiation studies but the source I obtained 6 months ago shows significant line ...
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How do electrons escape nuclear reactors to cause Cherenkov radiation?

From what I understand, nuclear reactor cores are shielded, so that gamma rays don't get too far too often. But since electrons are expected to penetrate less material, then how are underwater nuclear ...
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What is passive gamma ray emission?

I was trying to find the meaning of passive gamma-ray emission through the internet. I haven't found any helpful article except some research paper just denoting the word passive ray emission. They ...
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Can gamma rays pass through Geiger-Muller counter?

Im trying to build a custom Geiger-Muller counter with an argon tube ( i’m still choosing to use wether argon 36 or 40 ) . The fact is that the counter will be made of multiple tubes which are all on ...
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How is energy in terms of Intensity and Amplitude comparable to Energy in terms of Frequency?

Let's take LASER light. It has a high energy ,in terms of Amplitude, let's take a red light, of same frequency ,we are giving each of these to two atoms , now atom no $1$ is subjected to LASER light ,...
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The effect of higher and higher gamma ray energies on the atom

My knowledge in this area is very limited. Let's suppose we are cranking out more and more energetic gamma rays, as in we try to go far beyond one million electronvolts. What happens when it interacts ...
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Would electricity be able to make a gamma ray?

I read that lightning creates gamma rays, but i'm not sure if it would be possible to have a capacitor that powerful to make a gamma ray. If this is possible, how efficient would such a process be?
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What materials can bend or reflect gamma rays?

I have heard that gold can be used as a lens for gamma rays, but what exactly could reflect them? Having this technology could make something like a Dyson sphere much more efficient, I believe.
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How does scintillation work? [duplicate]

We are doing an experiment on gamma spectroscopy and came across the concept of scintillation. It says that it's a property of materials through which we can change high energy photons (gamma photons ...
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Is a gamma ray burst cylindrical (like a beam) or a cone? Could one hit both Earth and Mars at the same time?

I've always seen a GRB as a beam in various depictions. Can this beam be as wide as the distance from Earth to Mars? As in, could the beam be 400 million km in width as it travels through space? Or is ...
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Is liquid lead better gamma ray absorber than solid lead?

Is liquid lead better gamma ray absorber than solid lead? Can this be compared with the fact that an el.conductor has more resistance to current at higher temperatures? If yes could it be used in ...
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Is the capacity of absorbtion of gamma rays by a material dependent on its temperature?

Is the capacity of absorbtion of gamma rays by a material dependent on its temperature? As electrons heat up a wire that wire increases its resistance to the current. Is it same regarding gamma ray ...
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A book for single-photon emission computed tomography (SPECT) physicality

I am a graduate student, and I research the radiation detector which is similar to SPECT geometry. So I need a book to understand the physics inside the SPECT. Could you recommend books that describe ...
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How can a gamma ray conserve its momentum while travelling from the center towards the sun's surface?

How can a gamma ray can conserve its momentum while travelling from the center towards the surface of the sun? Shouldn't it lose most of its momentum while scattering from very lite hydrogen and ...
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Can we detect the alpha and beta particles using the scintillator detectors?

In the experiment gamma ray detection with scintillators, we can detect the gamma ray particle. Is it possible to detect alpha and beta particle using scintillator detectors. If not then why is so? ...
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Storing large quantities of potassium salts: nuclear radiation [closed]

Assuming I store $300 \;\text{kg}$ of potassium hydroxide in plastic bags on a palette in my living room. This is equivalent to $5347 \;\text{mol}$ of potassium content or roughly $0.626 \;\text{mol}$ ...
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How to produce ionizing radiation without radioactive substance?

I think ionizing radiation caused by ray or particles. My professor told me:"without radioactive substance,with only commercial products,it's possible to produce ionizing radiation." Can ...
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Energy released when particles and anti-particles encounter

My physics teacher told me that when particles and antiparticles collide, the energy of their vanished mass plus any kinetic energy they possessed, is converted into the energy of $\gamma$ rays or ...
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Why aren't gamma rays more ionizing than beta and alpha rays considering the fact that it is the highest energy photon and very penetrative?

Gamma rays are photons and light waves that have more than enough energy to excite an electron and break its bond. So why aren't they more ionizing than beta and alpha particles? Is this comparison ...
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I thought specific activity was a property of the radionuclide?

How can specific activity of Mo-99 be higher for Mo-99 produced from fission than Mo-99 produced from neutron capture? I thought specific activity would be a property of Mo-99 so it will always be the ...
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How does the channel relate to the energy of a peak in gamma spec?

In Gamma Ray Spectroscopy, what does the channel numbers for several peaks tell us about the energy of each peak? I'm not sure I quite understand the concept of the channel number. I'm sorry I cannot ...
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Can a gamma ray or x-ray cause an isotope change of a nucleus with all its electrons stripped away?

I learned that Sodium22 atoms decay to Neon 22 by ($\beta$+) (positron) emission. Also some other radioactive elements isotopes can undergo positron emission or electron absorption with a similar ...
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Do all radioactive isotopes and compounds exhibit photoluminesce?

I have an antique item - colored in a florescent yellow, which may be comprised of radioactive pigment like Uranium Oxide or other radionuclides I haven't a Geiger counter, but I already shined a UV ...
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Disintegration of the deuteron

Considering the scattering of gamma rays on a deuteron, which leads to its break up acording to: $$ \gamma+ d \longrightarrow p +n $$ we can use the conservation of energy and momentum in order to ...
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What technique is used to determine the energies of the radionuclide standards used in energy sensor calibration?

In using scintillator or germanium energy sensors, certain radionuclides representing some definite line energies are used to calibrate the sensors. What technique or method is used to determine the ...
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Why do gamma ray and x-ray photons which have significantly higher energy travel at the same speed as photons of visible light? [duplicate]

Photons which constitute X-rays and gamma rays have a significantly higher energy than those which constitute the visible light. If they have so much more energy, why do they travel at the same speed ...
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Gamma detector Resolution

I read that the resolution of the gamma-detector $\frac{∆E}E∝E^{-\frac12}$ But it didn't mention the derivation, I am interested in the derivation, any hint will be appreciated. Best Wishes Rashed ...
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How does the standard model of physics explain gamma radiation?

How can the standard model be used to explain gamma radiation? Maybe I should say how does the theory of quarks, weak force, and strong force combine to explain gamma ray emission during a decay ...
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Why does the formula for decreasing intensity of radiation only work for gamma rays? [closed]

$I(x) = I_0 \cdot e^{~-u \cdot x}$ Where u is the linear attenuation coefficient And how does this relate to the following $N(x) = N_0 \cdot e^{~-u \cdot x}$ Where N is the count rate of the beam ...
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Why do gamma-rays and neutrons produce different decay times in scintillation pulses from the same compound?

The basis of pulse shape discrimination is that gamma-rays and neutrons have different decay times of their electronic pulses. What makes gamma-rays and neutrons interact with the same compound ...
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Differences between gamma rays and X-rays [duplicate]

Some people said if it is originated from electrons then it is X-ray but if it is originated from the nucleus it is gamma ray. But people can produce X-rays and gamma rays via Bremsstrahlung process ...
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Generating very large area gamma rays by other ways other than large accelerators

According to this link https://apps.dtic.mil/dtic/tr/fulltext/u2/a351472.pdf, HERMES III at Sandia National Labs can generate very large area gamma rays by converting the electron beam into ...
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Where does the proton's kinetic energy go when a proton and nuclei are fused together to create a heavy nucleus? I cannot solve this problem

The problem then states: estimate the minimum wavelength of the gamma ray photon. The answer to this question is: 0.25 x 10^-11 - (binding energy of oxygen - the binding energy of F which is 0.04 x 10^...
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Peaks in Co-60 gamma spectrum

The following plot shows data collected from a Co-60 coincidence experiment. The detectors used were NaI(T) scintillation detectors. One detector was gated around the 1.33 MeV peak and the second ...
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$\rm NaI$ detector rate dependence on distance

I used a $\rm NaI$ scintillation detector to linked to a scalar unit that counts the number of gamma rays detected from a $^{22}$Na source. I repeated the experiment for equal time intervals of 40 ...
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Do nuclei emit photons?

Generally in text books they say that when a electron goes from high energy state to a lower energy state it emits photons. My question is, it is possible that a proton that goes from high energy ...
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What happens when chemical elements are struck by cosmic rays?

When struck by cosmic rays, chemical elements in soils and rocks emit uniquely identifiable signatures of energy in the form of gamma rays. These data can help scientists look for geologically ...
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What is "Afterglow" in Gamma-Ray Bursts and how is it caused?

This talks about "Afterglow" of a Gamma-Ray Burst. What exactly is an Afterglow? And how do we use these to detect GRBs(Gamma-Ray Bursts)?
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Rhodium based gamma-laser

Has anyone considered using the excited meta-state of Rh 102 to create a gamma-ray laser?. I see an advantage in favor of using Rh 102m extracted from nuclear waste over Hf 178m2. While Rh 102m has a ...
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What's the difference between Hard X-rays and Gamma-rays?

So I'm aware of this and this, but the question is Are Hard X-rays and Gamma-rays the same thing? If not, then what would be the key difference between them. Moreover, How much would the properties of ...
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Which one of the two does Gamma-Ray Astronomy most relate to: Physics or Chemistry?

So when I talk about Gamma-Ray astronomy, more specifically the following things: Sources of Gamma Rays in the Universe and how they originate Detection of Gamma Rays Gamma Ray Bursts or GRBs ...
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How close would a supernova be to endanger the astronauts on the ISS?

How close would a supernova be to endanger the astronauts on the ISS? Would Betelgeuse be close enough?
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Can gamma rays be blocked or redirected by magnetic or electromagnetic fields?

I've been interested in fusion research for a while now and found that reactions such as the proton-proton cycle produce a lot of gamma rays which require large quantities of water or lead to shield ...
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Metal, X-Ray, Gamma-ray

As I know, all metals absorb x-ray and gamma radiation. Also, as I know, all rays are converted into any energy. In this case, I mean warmth. For example, an x-ray is absorbed by metal, then metal ...
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How do you experimentally determine the value of the Compton edge from data?

A NaI scintillation detector was used to acquire the following data. In order to calibrate the detector, I fitted a Gaussian function to the photopeak. I now want to check that my measured value for ...
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Understanding the effect of Compton scattering in Gamma ray spectroscopy

The following calibrated gamma ray spectrum was taken using data for a Cs-137 source acquired using an NaI scintillation detector. The predicted value of the Compton edge was calculated using the ...
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What are the more important effects or consequences of gamma-ray bursts for the cosmos?

I would like to know what are, in general, the consequences/effects of the known gamma-ray bursts. I refer gamma-ray bursts from the Wikipedia Gamma-ray burst that shows how are classified and the ...
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On the uncertainty principle when a gamma-ray burst is passing close enough of the magnetic bubbles placed at the edge of a planetary system

I'm going to ask a related question to my past post Collision or impact of a gamma-ray burst against the magnetic bubbles at Solar System's edge on this site Physics Stack Exchange. I have no a good ...
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How should I treat background radiation in an experiment?

I am performing an experiment to verify the inverse-square law for the intensity of a beam of $\gamma$ rays emitted by a sample of $^{60}\text{Co}$. The set-up is as follows: A Geiger-Müller tube ...
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Collision or impact of a gamma-ray burst against the magnetic bubbles at Solar System's edge

I'm going to ask* about what should be the effect/interaction, if any, when a gamma-ray burst crashes or hits against the magnetic bubbles at Solar System's edge. These magnetic bubbles are explained ...
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