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Absolute Decay Counting of Sm-146 and Sm-147 for Early Solar System Chronology

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Title
Absolute Decay Counting of Sm-146 and Sm-147 for Early Solar System Chronology
Author(s)
Kim, G. B.; Borg, L. E.; Boyd, S. T. P.; Cantor, R. H.; Despotopulos, J. D.; Drury, O. B.; Friedrich, S.; Gallant, A.; Hines, N. R.; Jacobs, A.; Jovanovic, I; Kmak, K. N.; Kavner, A. R. L.; Yong Hamb Kim; Kunz, P.; Kwiatkowski, A.; Do Hyung Kwon; Lee, D.; Murbock, T.; Scielzo, N. D.; Shollenberger, Q. R.; Sio, C. K., I; Thomas, K. J.; Wooddy, T.; Walls, C.
Publication Date
2022-12
Journal
JOURNAL OF LOW TEMPERATURE PHYSICS, v.209, no.5-6, pp.824 - 831
Publisher
SPRINGER/PLENUM PUBLISHERS
Abstract
Sm-Nd chronometers use Sm-146 and Sm-147 to determine the ages of major events in the early Solar System. Their half-lives are the most important nuclear parameters determining the accuracy of chronometry. However, the Sm-146 half-life is not wellestablished: the published values differ by similar to 30%, which results in significant uncertainties in the Solar System timeline. We are re-measuring the half-lives of Sm-146 and Sm-147 using decay energy spectroscopy and metallic magnetic calorimeters to improve the accuracy of the Sm-Nd chronometers. We report recent experimental results from our first measurement of a Sm-147 source, as well as status and plans for experiments on Sm-146.
URI
https://pr.ibs.re.kr/handle/8788114/12800
DOI
10.1007/s10909-022-02798-6
ISSN
0022-2291
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > 1. Journal Papers (저널논문)
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