紀要論文

加速器で生成された不安定核原子観測に向けた蛍光検出系の高効率化

Efficiency improvement of a fluorescence detection system for radioisotope atoms generated at accelerators

jpn

24368083

https://doi.org/10.15002/00026416

法政大学大学院理工学研究科

法政大学大学院紀要. 理工学研究科編

64

1

5

2023-03-24

Version of Record

We have been developing a laser spectroscopic method named OROCHI for the study of the nuclear structure of low-yield unstable nuclei produced by accelerators. Spin-polarized states are generated for RI atoms stopped in superfluid helium by optical pumping, and Zeeman level splitting and hyperfine structure splitting are measured by using the laser-radio frequency / microwave double resonance method. When atoms are introduced into superfluid helium, the absorption and emission wavelengths of the atoms are different. We take the advantage of the intriguing spectroscopic environment of superfluid helium. We aim to improve the efficiency of LIF(Laser Induced Fluorescence) detection to measure the unstable ^84Rb hyperfine structure splitting in superfluid helium at accelerator beamlines. For this purpose, we enlarged the intersection area between an excitation laser and an accelerated beam. We evaluated the effect of this modification.

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