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

• Published in: Applied radiation and isotopes Vol. 134; pp. 297 - 301
• Main Authors: Sahagia, M., Luca, A., Ioan, M.-R., Antohe, A., Ivan, C.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.04.2018
• Subjects: 4πβ(PC)-γ coincidence; Decay scheme parameters; Impurities; Ionization chamber; Standardization of 67Cu; γ-ray spectrometry; γ-ray spectrometry; Decay scheme parameters; Ionization chamber; 4πβ(PC)-γ coincidence; Impurities; Standardization of 67Cu
• ISSN: 0969-8043; 1872-9800
• DOI: 10.1016/j.apradiso.2017.10.036

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. •Standardization by the 4πβ(PC)-γ coincidence method.•Calibration of the ionization chamber.•Problems: Excited level of 67Zn, decay scheme, impurity.•Absolute standardization is less influenced than the ionization chamber measurement.