Beta decay study of stored highly charged ions

2016 Fiscal Year Final Research Report

• Project/Area Number: 26287036
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Saitama University
• Principal Investigator: YAMAGUCHI Takayuki 埼玉大学, 理工学研究科, 准教授 (10375595)
• Co-Investigator(Kenkyū-buntansha): 山口 由高 国立研究開発法人理化学研究所, 仁科加速器研究センター, 仁科センター研究員 (40415328) ; 長江 大輔 国立研究開発法人理化学研究所, 仁科加速器研究センター, 協力研究員 (60455285)
• Co-Investigator(Renkei-kenkyūsha): WAKASUGI Masanori 理化学研究所, 仁科加速器研究センター, 室長 (70250107)
• Research Collaborator: SUZUKI Takeshi 埼玉大学, 理工学研究科, 教授 (10196842) ; SUZAKI Fumi 埼玉大学, 理工学研究科, 大学院生 ; OMIKA Syunichiro 埼玉大学, 理工学研究科, 大学院生 ; WAKAYAMA Kiyoshi 埼玉大学, 理工学研究科, 大学院生
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 多価イオン / 蓄積リング / ベータ崩壊 / 元素合成

Outline of Final Research Achievements

The present study aims at the beta-decay observation of highly charged radioactive ions stored at the storage ring, towards a deep understanding of nucleosynthesis. A high-resolution resonant Schottky pickup coupled with particle detectors enables the measurements of in-ring decays of stored ions, which would be similar to those in a stellar environment. We have precisely measured in-ring electron capture decays of hydrogen-like 142Pm, produced and separated by the in-flight fragment separator FRS, stored at the storage ring ESR for an extended period of time. In parallel, we have developed the particle detectors such as a resonant Schottky pickup, a velocity-selective Cherenkov detector, fiber scintillation detectors, and a beam monitor using delta-ray emission for the Rare-RI Ring facility at RIBF.

Free Research Field

原子核物理学（実験）