Half-life measurement of 44Sc and 44mSc

Duran, M. T.; Juget, F.; Nedjadi, Y.; Bailat, C.; Grundler, P. V.; Talip, Z.; van der Meulen, N. P.; Casolaro, P.; Dellepiane, G.; Braccini, S.

doi:10.1016/j.apradiso.2022.110507

The half-lives of 44Sc and 44mSc were measured by following their decay rate using several measurement systems: two ionization chambers and three γ-spectrometry detectors with digital and/or analogue electronics. For 44Sc, the result was the combination of seven half-life values giving a result of 4.042(7) h, which agrees with the last reported value of 4.042(3) h and confirms the near to 2% deviation from the recommended half-life of 3.97(4) h. Scandium-44 is present as an impurity in the production of 44Sc by cyclotron proton irradiation. Its half-life was determined by measurements performed a few days after End of Bomardment (EoB), so that the 44Sc decayed down to a negligible level. Seven measurements were combined to obtain an average of 58.7(3) h, which is in agreement with the recommended value of 58.6(1) h.

Half-life measurement of 44Sc and 44mSc / Duran, M. T.; Juget, F.; Nedjadi, Y.; Bailat, C.; Grundler, P. V.; Talip, Z.; van der Meulen, N. P.; Casolaro, P.; Dellepiane, G.; Braccini, S.. - In: APPLIED RADIATION AND ISOTOPES. - ISSN 0969-8043. - 190:(2022). [10.1016/j.apradiso.2022.110507]