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  Precision measurement of 65Zn electron-capture decays with the KDK coincidence setup

The KDK Collaboration, Hariasz, L., Di Stefano, P., Stukel, M., Rasco, B., Rykaczewski, K., et al. (2023). Precision measurement of 65Zn electron-capture decays with the KDK coincidence setup. Nuclear Data Sheets, 189, 224-234. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2023-314.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000F-1272-C Version Permalink: https://hdl.handle.net/21.11116/0000-000F-1273-B
Genre: Journal Article

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 Creators:
The KDK Collaboration1, Author
Hariasz, L.1, Author
Di Stefano, P.C.F.1, Author
Stukel, M.1, Author
Rasco, B.C.1, Author
Rykaczewski, K.P.1, Author
Brewer, N.T.1, Author
Grzywacz, R.K.1, Author
Lukosi, E.D.1, Author
Stracener, D.W.1, Author
Mancuso, M.1, Author
Petricca, F.1, Author
Ninkovic, J.1, Author
Lechner, P.1, Author
Affiliations:
1Max Planck Institute for Physics, Max Planck Society and Cooperation Partners, ou_2253650              

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Free keywords: Experimental Physics
 Abstract: 65 Zn is a common calibration source, moreover used as a radioactive tracer in medical and biological studies. In many cases, γ-spectroscopy is a preferred method of 65Zn standardization, which relies directly on the branching ratio of Jπ(65Zn)=5/2−→Jπ(65Cu)=5/2− via electron capture (EC*). We measure the relative intensity of this branch to that proceeding directly to the ground state (EC0) using a novel coincidence technique, finding IEC0/IEC*=0.9684±0.0018. Re-evaluating the decay scheme of 65Zn by adopting the commonly evaluated branching ratio of Iβ+=1.4271(7)% we obtain IEC*=(50.08±0.06)%, and IEC^0=(48.50±0.06)%. The associated 1115 keV gamma intensity agrees with the previously reported NNDC value, and is now accessible with a factor of ~2 increase in precision. Our re-evaluation removes reliance on the deduction of this gamma intensity from numerous measurements, some of which disagree and depend directly on total activity determination. The KDK experimental technique provides a new avenue for verification or updates to the decay scheme of 65Zn, and is applicable to other isotopes.

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 Dates: 2023
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: Other: MPP-2023-314
URI: https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2023-314
arXiv: arxiv:2308.03965
URI: https://inspirehep.net/arxiv/2308.03965
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Title: Nuclear Data Sheets
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 189 Sequence Number: - Start / End Page: 224 - 234 Identifier: -