First direct determination of the 93Mo half-life

Abstract This work presents the first direct measurement of the 93Mo half-life. The measurement is a combination of high-resolution mass spectrometry for the determination of the 93Mo concentration and liquid scintillation counting for determining the specific activity. A 93Mo sample of high purity...

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Autores principales:	I. Kajan, S. Heinitz, K. Kossert, P. Sprung, R. Dressler, D. Schumann
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8b4a680d6c6347d68ae2737ecd82fcbb
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spelling	oai:doaj.org-article:8b4a680d6c6347d68ae2737ecd82fcbb2021-12-02T19:16:14ZFirst direct determination of the 93Mo half-life10.1038/s41598-021-99253-52045-2322https://doaj.org/article/8b4a680d6c6347d68ae2737ecd82fcbb2021-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-99253-5https://doaj.org/toc/2045-2322Abstract This work presents the first direct measurement of the 93Mo half-life. The measurement is a combination of high-resolution mass spectrometry for the determination of the 93Mo concentration and liquid scintillation counting for determining the specific activity. A 93Mo sample of high purity was obtained from proton irradiated niobium by chemical separation of molybdenum with a decontamination factor larger than 1.6 × 1014 with respect to Nb. The half-life of 93Mo was deduced to be 4839(63) years, which is more than 20% longer than the currently adopted value, whereas the relative uncertainty could be reduced by a factor of 15. The probability that the 93Mo decays to the metastable state 93mNb was determined to be 95.7(16)%. This value is a factor of 8 more precise than previous estimations. Due to the man-made production of 93Mo in nuclear facilities, the result leads to significantly increased precision for modelling the low-level nuclear waste composition. The presented work demonstrates the importance of chemical separations in combination with state-of-the-art analysis techniques, which are inevitable for precise and accurate determinations of nuclear decay data.I. KajanS. HeinitzK. KossertP. SprungR. DresslerD. SchumannNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q I. Kajan S. Heinitz K. Kossert P. Sprung R. Dressler D. Schumann First direct determination of the 93Mo half-life
description	Abstract This work presents the first direct measurement of the 93Mo half-life. The measurement is a combination of high-resolution mass spectrometry for the determination of the 93Mo concentration and liquid scintillation counting for determining the specific activity. A 93Mo sample of high purity was obtained from proton irradiated niobium by chemical separation of molybdenum with a decontamination factor larger than 1.6 × 1014 with respect to Nb. The half-life of 93Mo was deduced to be 4839(63) years, which is more than 20% longer than the currently adopted value, whereas the relative uncertainty could be reduced by a factor of 15. The probability that the 93Mo decays to the metastable state 93mNb was determined to be 95.7(16)%. This value is a factor of 8 more precise than previous estimations. Due to the man-made production of 93Mo in nuclear facilities, the result leads to significantly increased precision for modelling the low-level nuclear waste composition. The presented work demonstrates the importance of chemical separations in combination with state-of-the-art analysis techniques, which are inevitable for precise and accurate determinations of nuclear decay data.
format	article
author	I. Kajan S. Heinitz K. Kossert P. Sprung R. Dressler D. Schumann
author_facet	I. Kajan S. Heinitz K. Kossert P. Sprung R. Dressler D. Schumann
author_sort	I. Kajan
title	First direct determination of the 93Mo half-life
title_short	First direct determination of the 93Mo half-life
title_full	First direct determination of the 93Mo half-life
title_fullStr	First direct determination of the 93Mo half-life
title_full_unstemmed	First direct determination of the 93Mo half-life
title_sort	first direct determination of the 93mo half-life
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8b4a680d6c6347d68ae2737ecd82fcbb
work_keys_str_mv	AT ikajan firstdirectdeterminationofthe93mohalflife AT sheinitz firstdirectdeterminationofthe93mohalflife AT kkossert firstdirectdeterminationofthe93mohalflife AT psprung firstdirectdeterminationofthe93mohalflife AT rdressler firstdirectdeterminationofthe93mohalflife AT dschumann firstdirectdeterminationofthe93mohalflife
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First direct determination of the 93Mo half-life

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