Questions tagged [radioactivity]

Questions relating to radioactive substances and the chemistry of radioactivity. Also, use [rare-earth-elements] if the question is about their radioactivity specifically.

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How to estimate the enrichment of U-234 from the enrichment of U-235?

Fresh nuclear fuel made from naturally occurring uranium (i.e. neither MOX nor ERU fuel) is mainly characterised by the enrichment of $\ce{^235U}$. The mass and activity concentrations of $\ce{^235U}$ ...
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79 views

Troubleshoot anion exchange column (Fe, Cr, Co separation)?

I ran an anion exchange column to separatate Fe, Cr, Co from solution of concentrated HCl. The column was Dowex 1x8, 200-400 mesh, diameter < 0.5 cm, lenth 7 cm. A gradient of acid concentrations ...
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60 views

Calculating the age by radioactive dating

The following was an example done in class, so I know the answer and (maybe?) the formula, but I still can't derive it for myself, and I would appreciate some help. Given a sample of biotite with $\...
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81 views

Finding half life of a given decay path given percentage decayed in each path

$^{64}_{29}\ce{Cu}$(" half life" =$12.8$ "hours" ) decay by $\beta^{-}$- emission (38%), $\beta^+$- emission(19%), and electron capture (43%). Write the decay products and ...
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Where do the electrons for which RTG's use for the Seeback effect come from?

I know that RTG's use Radioactive Isotope that emit Alpha particles generally (ie. NASA uses Pu 238), I also know that these Alpha particles are consiting of 2 Protons and 2 Neutrons, since the RTG ...
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52 views

How is the atomic number of a beta particle zero?

In my textbook, $\ce{β-}$ particle is denoted as $_{-1}e^0$. This means that the atomic number of $\ce{β-}$ is $\ce{-1}$. But that doesn't make any sense. Also, how is the mass number of $\ce{β-}$ ...
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25 views

Can the presence of radon (Rn-222) be determined by testing dust?

If a relatively unventilated area, like a basement, were to be exposed to radon gas (Rn-222), would the dust in the area possess a detectable amount of lead? Considering lead 214 is a decay product of ...
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Tracer Recovery in Analysis of Alpha Emitting Radionuclides

I am doing experiments analyzing the activity concentrations (Bq/kg) of several radionuclides and there is a small thing I don't quite understand how tracers work in the calculation of the activity ...