A Lab-Scale Experiment for keV Sterile Neutrino Search

Author:

Lee Y. C.ORCID,Kim H. B.,Kim H. L.,Kim S. K.,Kim Y. H.,Kwon D. H.,Lim H. S.,Park H. S.,Woo K. R.,Yoon Y. S.

Abstract

AbstractWe developed a simple small-scale experiment to measure the beta decay spectrum of$$^{3}$$3H. The aim of this research is to investigate the presence of sterile neutrinos in the keV region. Tritium nuclei were embedded in a 1$$\times$$×1$$\times$$×1 cm$$^3$$3LiF crystal from the$$^6$$6Li(n,$$\alpha$$α)$$^3$$3H 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$$^3$$3H beta measurements. The spectrum of a 10-hour measurement agrees well with the expected spectrum of$$^3$$3H beta decay. The analysis results indicate that this method can be used to search for keV-scale sterile neutrinos.

Publisher

Springer Science and Business Media LLC

Subject

Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics

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