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Development of a Dual Cryogenic Detection System for the Forbidden Non-unique β-Decay Spectrum Study

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Title
Development of a Dual Cryogenic Detection System for the Forbidden Non-unique β-Decay Spectrum Study
Author(s)
Hyelim Kim; Kim, H.J.; Tae Kim Woo; Yeongduk Kim; Yong Hamb Kim; Moo Hyun Lee; Yong Chang Lee; Nagorny, S.S.; Shlegel, V.N.; Jung Ho So
Publication Date
2024-07
Journal
Journal of Low Temperature Physics, v.216, pp.328 - 335
Publisher
Kluwer Academic/Plenum Publishers
Abstract
We present the development of a dual-detector system designed for investigating the spectral shape of forbidden non-unique beta decays. Two PbMoO4 scintillating crystals were carefully prepared for heat and light detection at milli-Kelvin (mK) temperatures. Notably, one crystal was synthesized using archaeological lead, while the other was composed of natural modern lead. The significance of employing two crystals lies in their identical dimensions and proximity, resulting in similar environmental background exposure. Their distinct internal radioactivities, particularly associated with 210Pb, introduce a distinguishing factor between the spectra measured in the two detectors. Our detection method includes achieving clear particle identification through the relative amplitudes of light and heat signals for both crystals. This report compares the electron-induced spectra within energy regions both below and above the endpoint of 210Bi beta decay. This comparative study provides valuable insights into an exact measurement of the 210Bi decay spectrum, forbidden non-unique beta decay. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.
URI
https://pr.ibs.re.kr/handle/8788114/15428
DOI
10.1007/s10909-024-03139-5
ISSN
0022-2291
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > 1. Journal Papers (저널논문)
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