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Hariasz, L.; Di Stefano, P.C.F.; Stukel, M.; Rasco, B.C.; Rykaczewski, K.P.; Brewer, N.T.; Grzywacz, R.K.; Lukosi, E.D.; Stracener, D.W.; Mancuso, M.; Petricca, F.; Ninkovic, J.; Lechner, P.
Nuclear data sheets, 06/2023, Letnik: 189, Številka: 1Journal Article
65Zn 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 IEC0 = (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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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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