Journal
JOURNAL OF LOW TEMPERATURE PHYSICS
Volume 209, Issue 5-6, Pages 919-926Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10909-022-02879-6
Keywords
Tritium; MMC; Sterile neutrino
Categories
Funding
- [IBS-R016-A2]
- [NRF-2021R1A2C3010989]
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A simple small-scale experiment was developed to measure the beta decay spectrum of H-3 in order to investigate the presence of sterile neutrinos in the keV region. By using a new method of sample preparation, experiments, and analysis, the researchers found that this method can be used to effectively search for keV-scale sterile neutrinos.
We developed a simple small-scale experiment to measure the beta decay spectrum of H-3. The aim of this research is to investigate the presence of sterile neutrinos in the keV region. Tritium nuclei were embedded in a 1x1x1 cm(3) LiF crystal from the Li-6(n,alpha)H-3 reaction. The energy of the beta electrons absorbed in the LiF crystal was measured with a magnetic microcalorimeter at 40 mK. We report a new method of sample preparation, experiments, and analysis of H-3 beta measurements. The spectrum of a 10-hour measurement agrees well with the expected spectrum of H-3 beta decay. The analysis results indicate that this method can be used to search for keV-scale sterile neutrinos.
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