Branching ratios for the three most intense gamma rays in the decay of 47Ca
Abstract
A sample of 47Ca produced through isotope harvesting at the National Superconducting Cyclotron Laboratory was used to measure branching ratios of 7.17(5)%, 7.11(5)%, and 75.0(5)% for the 489.2, 807.9, and 1297.1 keV characteristic gamma rays, respectively. Based on these updated branching ratios, the ground state to ground state 47Ca to 47Sc beta decay branching ratio has been indirectly measured as 17.7(5)% and the ground state to 1297.1 keV excited state as 82.2(5)%. Here these values represent a greatly increased precision for all five branching ratios compared to the currently accepted values. The measurements presented here were made relative to the ingrown 47Sc daughter in a47Ca sample and the well-established 159.4 keV gamma-ray branching ratio and the half-life for the decay of 47Sc. These measurements were supported by verifying that the half-lives measured from characteristic gamma-ray peaks over multiple spectra for both 47Ca and 47Sc were consistent with previously reported values. Additionally, the half-lives of both 47Ca and 47Sc were independently measured with Liquid Scintillation Counting to reverify the previously reported values used in this study to find updated gamma-ray branching ratio values.
- Authors:
-
[1];
[1]
- Michigan State University, East Lansing, MI (United States). National Superconducting Cyclotron Laboratory
- Publication Date:
- Research Org.:
- Krell Institute, Ames, IA (United States); Michigan State Univ., East Lansing, MI (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC); Michigan State University
- OSTI Identifier:
- 1976864
- Grant/Contract Number:
- NA0003864; SC0018637
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Radiation and Isotopes
- Additional Journal Information:
- Journal Volume: 179; Journal Issue: C; Journal ID: ISSN 0969-8043
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 07 ISOTOPE AND RADIATION SOURCES; calcium-47; scandium-47; isotope harvesting; nuclear data; branching ratios
Citation Formats
Abel, E. Paige, Kleinfeldt, Chloe, Kalman, Morgan, and Severin, Gregory W. Branching ratios for the three most intense gamma rays in the decay of 47Ca. United States: N. p., 2021.
Web. doi:10.1016/j.apradiso.2021.109994.
Abel, E. Paige, Kleinfeldt, Chloe, Kalman, Morgan, & Severin, Gregory W. Branching ratios for the three most intense gamma rays in the decay of 47Ca. United States. https://doi.org/10.1016/j.apradiso.2021.109994
Abel, E. Paige, Kleinfeldt, Chloe, Kalman, Morgan, and Severin, Gregory W. Fri .
"Branching ratios for the three most intense gamma rays in the decay of 47Ca". United States. https://doi.org/10.1016/j.apradiso.2021.109994. https://www.osti.gov/servlets/purl/1976864.
@article{osti_1976864,
title = {Branching ratios for the three most intense gamma rays in the decay of 47Ca},
author = {Abel, E. Paige and Kleinfeldt, Chloe and Kalman, Morgan and Severin, Gregory W.},
abstractNote = {A sample of 47Ca produced through isotope harvesting at the National Superconducting Cyclotron Laboratory was used to measure branching ratios of 7.17(5)%, 7.11(5)%, and 75.0(5)% for the 489.2, 807.9, and 1297.1 keV characteristic gamma rays, respectively. Based on these updated branching ratios, the ground state to ground state 47Ca to 47Sc beta decay branching ratio has been indirectly measured as 17.7(5)% and the ground state to 1297.1 keV excited state as 82.2(5)%. Here these values represent a greatly increased precision for all five branching ratios compared to the currently accepted values. The measurements presented here were made relative to the ingrown 47Sc daughter in a47Ca sample and the well-established 159.4 keV gamma-ray branching ratio and the half-life for the decay of 47Sc. These measurements were supported by verifying that the half-lives measured from characteristic gamma-ray peaks over multiple spectra for both 47Ca and 47Sc were consistent with previously reported values. Additionally, the half-lives of both 47Ca and 47Sc were independently measured with Liquid Scintillation Counting to reverify the previously reported values used in this study to find updated gamma-ray branching ratio values.},
doi = {10.1016/j.apradiso.2021.109994},
journal = {Applied Radiation and Isotopes},
number = C,
volume = 179,
place = {United States},
year = {Fri Oct 22 00:00:00 EDT 2021},
month = {Fri Oct 22 00:00:00 EDT 2021}
}
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