Development of laser isotope separation (LIS) of

Le résumé fourni par la source

Investigating neutrinoless double beta decay experiment (0νββ) offers one of the most direct paths toward understanding the nature of neutrinos. The CANDLES investigated this phenomenon using 48Ca, which has the highest Q-value of 4.23 MeV among the double beta decay nuclides. Nevertheless, a large amount of double beta decay nuclides is required, but 48Ca has a natural abundance of 0.187%. A large-scale production system is being developed to produce 48Ca by laser isotope separation (LIS). The spatial distribution of the calcium atomic beam was measured with the time-of-flight (TOF) mass spectrometry. In this report, the measurement showed a displacement of 48Ca at 3.12 ± 0.11 mm, while no displacement was observed for other measurable isotopes, including 40Ca and 44Ca. The overall configuration and requirements for mass production utilizing single-frequency and high-power laser diodes are discussed, targeting the high production yield to meet the requirements of the 0vββ study.

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