Real-time observation of radiative cooling of isolated molecular ions in RICE

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K13859
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: Rikkyo University (2017); Institute of Physical and Chemical Research (2016)
• Principal Investigator: NAKANO Yuji 立教大学, 理学部, 准教授 (20586036)
• Co-Investigator(Renkei-kenkyūsha): KUMA Susumu 理化学研究所, 東原子分子物理研究室, 研究員 (50600045)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: イオン蓄積リング / 輻射冷却 / 回転分光 / 前期解離

Outline of Final Research Achievements

An in-ring predissociation spectroscopy of N2O+ molecular ions, A2Σ+←X2Π2/3 (000)-(200), has been carried out in the RIKEN Cryogenic Electrostatic ring (RICE). With the use of a dedicated detection system, rotational spectra of N2O+ were observed at different storage periods of from 250 microseconds to about 1 second. The real-time observation of rotational population distribution was successfully attained, and the change of rotational temperature was measured by comparing the experimental result to numerical simulations using the pgopher code.

Free Research Field

原子分子物理