Precision lifetime measurement of metastable ions using an electrostatic linear ion trap

2015 Fiscal Year Final Research Report

• Project/Area Number: 25400537
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Plasma science
• Research Institution: Kyoto University (2014-2015); Kyoto Prefectural University (2013)
• Principal Investigator: manabu saito 京都大学, 工学(系)研究科(研究院), 准教授 (60235075)
• Co-Investigator(Kenkyū-buntansha): HARUYAMA Yoichi 京都府立大学, 生命環境科学研究科, 教授 (00173097)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: イオントラップ / 多価イオン / 準安定状態 / 寿命 / 電子捕獲

Outline of Final Research Achievements

We performed precision measurement of the lifetime of the metastable state in doubly charged Kr ions. In general lifetimes of metastable states of ions have been determined by measuring the photons emitted during the transition using ion traps. However, for commonly used ion traps, it is difficult to estimate the destruction of the trapped ions by collisions (neutralization or scattering) with residual gases. This estimation significantly influences to the accuracy of the lifetime measurement. In this study, we precisely monitored the variation in the number of stored ions over time using an electrostatic linear ion trap. This enabled to improve the measurement accuracy of the lifetime of the metastable state.

Free Research Field

原子・分子物理学