Standardization of 67Cu and calibration of the ionization chamber. Impurities and decay scheme problems

M Sahagia; A Luca; M-R Ioan; A Antohe; C Ivan

doi:10.1016/j.apradiso.2017.10.036

Standardization of ⁶⁷Cu and calibration of the ionization chamber. Impurities and decay scheme problems

Appl Radiat Isot. 2018 Apr:134:297-301. doi: 10.1016/j.apradiso.2017.10.036. Epub 2017 Oct 19.

Authors

M Sahagia¹, A Luca², M-R Ioan², A Antohe², C Ivan²

Affiliations

¹ Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, IFIN-HH, Bucharest .30 Reactorului St. Magurele, jud. Ilfov, POB MG-6, RO 0-77125, Romania. Electronic address: msahagia@nipne.ro.
² Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, IFIN-HH, Bucharest .30 Reactorului St. Magurele, jud. Ilfov, POB MG-6, RO 0-77125, Romania.

PMID: 29107515
DOI: 10.1016/j.apradiso.2017.10.036

Abstract

This paper describes the standardization of ⁶⁷Cu by the 4πβ(PC)-γ coincidence method, and the calibration of ionization chamber. The difficulties were. (i) One of the excited levels of ⁶⁷Zn has a half life of 9.10μs. (ii) A recent publication reconsiders the decay scheme parameters. (iii) The solution had a significant content of impurities. The conclusions were that the result of absolute standardization is less influenced by the decay scheme parameters and impurities than the measurements by ionization chamber.

Keywords: 4πβ(PC)-γ coincidence; Decay scheme parameters; Impurities; Ionization chamber; Standardization of (67)Cu; γ-ray spectrometry.