The KDK (potassium decay) experiment

P. C. F. Di Stefano; N. Brewer; A. Fijałkowska; Z. Gai; K. C. Goetz; R. Grzywacz; D. Hamm; P. Lechner; Y. Liu; E. Lukosi; M. Mancuso; C. Melcher; J. Ninkovic; F. Petricca; B. C. Rasco; C. Rouleau; K. P. Rykaczewski; P. Squillari; L. Stand; D. Stracener; M. Stukel; M. Wolińska-Cichocka; I. Yavin

arXiv · 1711.04004

The KDK (potassium decay) experiment

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Abstract

Potassium-40 (${}^{40}$K) is a background in many rare-event searches and may well play a role in interpreting results from the DAMA dark-matter search. The electron-capture decay of ${}^{40}$K to the ground state of ${}^{40}$Ar has never been measured and contributes an unknown amount of background. The KDK (potassium decay) collaboration will measure this branching ratio using a ${}^{40}$K source, an X-ray detector, and the Modular Total Absorption Spectrometer at Oak Ridge National Laboratory.

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P. C. F. Di Stefano, N. Brewer, A. Fijałkowska, Z. Gai, K. C. Goetz, R. Grzywacz, D. Hamm, P. Lechner, Y. Liu, E. Lukosi, M. Mancuso, C. Melcher, J. Ninkovic, F. Petricca, B. C. Rasco, C. Rouleau, K. P. Rykaczewski, P. Squillari, L. Stand, D. Stracener, M. Stukel, M. Wolińska-Cichocka, I. Yavin. 2017-11-10. The KDK (potassium decay) experiment. https://arxiv.org/abs/1711.04004

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