Gamma ray induced positron annihilation spectroscopy at UVSOR-III

Taira, Yoshitaka*; Sugita, Kento*; Okano, Yasuaki*; Hirade, Tetsuya

We have developed the gamma-ray induced positron annihilation lifetime spectroscopy (GiPALS) with a time resolution of 140 ps. It has eight BaF $_{2}$ detectors and two digital oscilloscopes currently available for users. In addition to GiPALS, we have developed gamma-ray induced age-momentum correlation (GiAMOC). We will present a generation method of the ultra-short pulsed gamma-rays, details of GiPALS and GiAMOC, and future plans, including the development of a spin-polarized positron source generated from circularly polarized gamma rays.

Language	:	English
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Meeting title	:	19th International Conference on Positron Annihilation (ICPA-19)
Held date	:	2022/08
Location (city)	:	Helsinki (online)
Location (country)	:	Finland
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Keywords	:	超短パルスガンマ線; 陽電子
Research Facility	:	第4研究棟
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Registration No. : BB20220238
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