Questions tagged [gamma-rays]

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

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Do alpha and beta decay always emit gamma radiation?

I am looking at Ra-226 and trying to identify the decays for each peak in its gamma-ray spectroscopy spectrum. I know some alpha and beta decays emit gamma radiation but it's this always true? Can I ...
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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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Gamma rays as byproduct of fission

I have a quick question about fission and its byproducts more specifically gamma rays. So let's for example take a fission of a single atom of Uranium-$235$,from sources I found on the internet the ...
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Are there any materials transparent to $\gamma$-rays, and to which frequencies an ordinary glass is opaque?

I know that materials are generally opaque to frequencies of light that matches their own natural frequencies. I wonder if there are materials transparent to gamma-waves. That is, high fluxes of gamma ...
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Can one extract one extract macroscopic momentum from gamma rays?

I know when solar radiation hits a light sail thrust can be generated. However, I'm not sure if a photon sail that could extract momentum out of gamma rays could be built with current material science ...
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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 exactly is the science behind the detection of Cosmic Gamma-rays?

As far as I know the basic principle used by telescopes to detect Gamma-rays is through Compton scattering. This does explain the science behind Detection of gamma-rays through compton scattering but ...
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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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Gamma-ray burst velocity

Is it possible for an impactor wave in an expanding gamma-ray burst jet to accelerate from subluminal to superluminal velocities, or decelerate from superluminal to subluminal velocities? If so, how?
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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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Backscattering of gamma rays due to lead

I am conducting an investigation of backscattering in gamma ray spectroscopy. A backscattering factor $F_b$ is defined as: $$ F_b = \frac{N_b}{N_i}\times 100\% $$ where $N_b =$ Number of photons ...
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Why bulk of HPGe detectors is doped?

When I am looking at schematic diagrams of HPGe gamma spectrometer detectors (like this Ortec GLP one), it is often mentioned that bulk of Ge is doped. In this example - P-type doped. Is there a ...
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Simulate Background Gamma Radiation for Localization [closed]

I'm working on a gamma radiation source localization project. The gamma radiation measurement model is: $\lambda_k = \frac{I}{(x_s - x_k)^2 + (y_s - x_y)^2} +\lambda_b$. Where $\lambda_k$ is the $...
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How can I create gamma rays with energy >2MeV?

I have been exploring pair production (electron/positron) using gamma, and with a Cobalt-60 source this is easy enough. That's just the problem, though. I'm looking for a challenge. I want a stream ...
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Is the gamma radiation width equal to total level width in a nuclear reaction?

Consider a nuclear reaction in which an indium nucleus is bombarded by neutrons. The question I am dealing with asks to find the relative probabilities of (n,n) and (n,$\gamma$). The total level width ...
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EM waves with frequency much higher than gamma rays penetrate a planet like Earth?

I have just started to study the electromagnetic waves as a personal interest. I wonder if there exist a much higher frequency of electromagnetic wave than Gamma Ray's which can even penetrate Earth. ...
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Calculating expected gamma attenuation without a specific energy level

I am trying to calculate 2 things for a science experiment involving radiation and shielding using a geiger counter. A) whether the reduction in counts per minute through a measured thickness of ...
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What is the lowest energy gamma ray?

If we use the "origin-based" definition of gamma rays (i.e. photons emitted from nuclear decay, regardless of wavelength), which decay produces the lowest-energy, longest-wavelength emission? This ...
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Is there a difference in wavelength emission spectra of ZnS:Ag when its irradiated with protons vs. gammas?

How would I measure this, because I couldn't find this information in literature as of yet? I have neutron (to produce protons by recoil) and gamma sources, but I don't have a pure neutron source, and ...
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Would SiPMs respond differently to scintillation light from neutrons vs. gammas?

I have a fast-neutron scintillator which also is sensitive to gammas (much less so, though). When I connect it to a SiPM instead of a PMT, the gamma pulses (obtained from performing pulse shape ...
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Step-like contribution to background $\gamma$ ray peaks

I'm reading the paper "Analytical functions for fitting peaks from Ge semiconductor detectors" by R.G. Helmer and M.A. Lee. For $\gamma$ ray peaks the spectral "background" in the region of a peak: ...
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Is there a mathematical model for predicting when gamma rays are produced in radioactive decay?

My understanding of gamma ray emission from radioactivity is that the daughter particle is in an excited state, which then produces a gamma ray as the electron drops energy levels. In the case of ...
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High-purity silicon detector vs HPGe for gamma-spectroscopy

Is it possible to construct a high-purity silicon detector for gamma spectroscopy the same way HPGe detectors are made? Will it work when cooled to the same 77 K? Why HPGe is mainly used for gamma ...
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How do we recover fusion energy from gamma photons

Most fusion reactions create energy in form of hard gamma radiations. A single gamma photon carries energy orders of magnitude higher than any ionization level. Even if we develop some hardcore ...
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X-rays / Gamma rays “oven” vs microwave oven

Let's imagine a seller scammed you and sold you a Gamma rays / X-rays "oven" instead of a common microwave oven. The power consumption would be the same as a common microwave oven, i.e. about 1 kW, ...
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Neutron capture gamma energy

I have the atom 113Cd which captures a neutron and becomes 114Cd. This 114Cd goes from being exited to its base by emitting gamma rays. How can I calculate the Energy of those gamma rays? I can ignore ...
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Which are the highest energy gamma-rays produced by humans?

We can produce energetic gamma-rays on Earth in nuclear reactions but also among the decay products of LHC particle collisions. So I was wandering which are exactly the highest energy man-made gamma-...
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In an anti-matter universe, would an anti-matter black hole emit anti-matter gamma radiation? [duplicate]

In an anti-matter universe, when an anti-matter black hole is consuming a large anti-matter star, would it emit anti-matter gamma radiation, or would gamma radiation be the same in either a matter or ...
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What happens after barium sulphate absorbs gamma rays?

BaSO4 will happily absorb gamma-rays, presumably bumping electrons up into outer orbitals. What happens next? I assume fluoresence as electrons drop back. Will the BaSO4 be safe to handle immediately ...
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Half thickness of lead using a Ba-133m source, references?

I carried out an experiment to calculate the half thickness (half value layer) of lead. The experiment was done using what i believe to be a Ba-133m source on this software: https://radiation-lab....
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Why Li is not added as contact by ion implantation method in p type HPGe detector? [duplicate]

n+ contact of p type Ge is ~700µm thick compared to p+ contact of n type Ge only ~0.3µm. The process of adding the contact is different. n+ contact Li is added by diffusion process but p+ contact B is ...

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