Any electron/beta coincidence database?

  • #1
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Summary:
Any database for electron/beta coincidence database?
Hello All,

I am aware of databases which list possible gamma-gamma coincidences for desired isotope. For example: here provides a table at the bottom with all possible gamma-gamma coincidence for Co-60.

Question is, are there any similar databases/tables for electron coincidences with gammas/x-rays for example? As an example 129 keV internal conversion electron is in coincidence with 30 keV x-rays in Xe-131m.
 

Answers and Replies

  • #2
Astronuc
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Science Advisor
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Summary:: Any database for electron/beta coincidence database?

Question is, are there any similar databases/tables for electron coincidences with gammas/x-rays for example? As an example 129 keV internal conversion electron is in coincidence with 30 keV x-rays in Xe-131m.
As far as I know, it's the same database that one cited.

On the 60Co page, one finds a diagram with beta decay and accompanying gammas.
https://www.nndc.bnl.gov/nudat3/get...s=60NI&dsid=60co bM decay (1925.28 d)&unc=nds

60Co may undergo an isomeric transition, as well as beta decay. Beta decay is accompanied by gamma decay, which is well known. The beta energy is very low, so the interest has been and is the 1.17 and 1.33 MeV gammas that are common for the decay to the 60Ni ground state.

Is one asking about isotopes undergoing internal conversion? Or beta decay? Or more generally, any and all processes?

Beta-gamma coincidence has been done, probably for all radionuclides that undergo beta decay, which is why we know the various energy levels. BNL NNDC maintains the database.

An example for 28Al - https://www.tandfonline.com/doi/pdf/10.1080/18811248.2000.9714964

Another example for Xe radioisotopes - https://www.sciencedirect.com/science/article/abs/pii/S0168900219313063 (requires access to ScienceDirect)

https://www.sciencedirect.com/science/article/abs/pii/0020708X59901991 (requires access to ScienceDirect)
 
  • #3
ORF
167
17
Hi,

I think ENSDF/XUNDL databases are what you are looking for. You shall try first ENSDF (Evaluated data),
https://www.nndc.bnl.gov/ensdf/
and if the data is not complete, you may try XUNDL (Unevaluated data),
https://www.nndc.bnl.gov/ensdf/ensdf/xundl.jsp

This is how XUNDL webpage looks like. In you example case, you might be interested in decay of 131I to 131Xe
Screenshot from 2021-11-21 16-53-36.png


You may inspect the list of gammas associated with such decay and the level scheme. Here you can see the list of gammas. The 30 keV x-ray are the K-alpha and K-beta characteristic X-rays.

Screenshot from 2021-11-21 16-53-20.png

On the other hand, you have to look for the IT...
Screenshot from 2021-11-21 17-01-32.png





The coincidence of IT electrons with characteristic x-rays is implicit.

I hope it helps.

Cheers,
ORF
 

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