Questions tagged [isotopes]
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What is the standard reference medium in which positron ranges data are obtained in property tables, specifically for isotopes used in PET?
What is the standard reference medium in which positron ranges data are obtained in property tables, specifically for isotopes used in (Positron Emission Tomography (PET)?
I can't find any valuable ...
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Flux pinning upon a ultracold vapor of neutral atoms
Suppose I have a mixture of two different atoms A and B, both with an even but different number of electrons which fully fill both of their outermost shells. The two are different elements.
Now, ...
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Ultracold magnetic traps for uranium enrichment
As noted by Mr. Gremlin in this post: How is it possible to accelerate a neutron?
Crudely paraphrasing, subatomic particles with non-zero magnetic dipole moments interact with magnetic fields to give ...
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Why does critical mass for radioactive isotopes seem to have little relation to half-life?
I understand that too short a half-life and flash point, becomes kind of meaningless, if the element generates too much heat, so this only applies to longer half-lives.
Also, as I understand it, flash ...
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What is known about the isotope distribution of neutronium decay?
Sometimes it is known to happen. For example, neutron star mergers might result in unstable neutronium droplets which lose the enormous pressure that makes them stable. A "nucleon" of $10^{...
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Changing element and isotope ratio ratio in material in space
Suppose we have a satellite orbiting Earth with a component made of 6061 aluminium alloy.
Would cosmic radiation cause the element and isotope ratio of the component to change in a clearly measurable ...
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Cobalt atomic mass less than 100 % isotope mass? [closed]
Why is cobalt's atomic mass listed on periodic tables as less than 59 amu when its main isotope (virtually 100 %) is cobalt 59 with a trace of cobalt 60? After reading a bit I'm wondering if it has to ...
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Does antimatter have the same half-life as ordinary matter?
Antimatter is just ordinary matter but with opposite electric charge.
Scientists have created only a handful of antihelium-4 in the LHC.
I am wondering if the half-life of, say, antiRadium-226 is ...
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Most stable isobar for even-$A$ nuclei
In the Liquid Drop Model of the nucleus, the most stable isobar is the one whose atomic number $Z_{A}$ is the one corresponding to the minimum mass, and can be found from the mass parabola or, by ...
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Isotopes and electron transitions
Do neutrons in the nucleus (isotopes) affect the frequency of electron transitions through valence shells?
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Understanding the decay of Na-22
When looking at data for Na-22 decay (e.g. here: https://www.nndc.bnl.gov/nudat3/DecayRadiationServlet?nuc=22Na&unc=NDS ) it shows that for every 100 decays, there should be:
99.94 gammas with ...
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Finding exhaustive list of isotopes known to have the induced-fission property [closed]
Not sure if this is the right place to ask, since I am looking for help finding information.
I am making course material in low level nuclear physics. For this, I've created my own visual Segre Chart (...
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U-235 percentage in nature
It is mentioned everywhere that the percentage of Uranium 235 isotope found in natural uranium is 0.711%. Samples collected from ores around the earth also seem to attest to this claim.
Is U-235 0.711 ...
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Capillary action for isotope separation
Take, for example, D2O and H2O. As they have different densities, they should have a different maximum capillary height h, where h is defined according to Jurin's law. Then, each isotope of D and H ...
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How the $N/Z$ ratio affects the stability of isotopes and their method of radioactive decay?
Although there is a graph that tells us the number of isotopes and which ones are stable or abundant in nature, like the one below, I have come across the $N/Z$ ratio, which is the number of neutrons ...
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