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Absolute optical absorption cross-section measurement of Rb atoms injected into superfluid helium using energetic ion beams

  • Kei Imamura
  • , Yukari Matsuo
  • , Wataru Kobayashi
  • , Tsuyoshi Egami
  • , Makoto Sanjo
  • , Aiko Takamine
  • , Tomomi Fujita
  • , Daiki Tominaga
  • , Yutaro Nakamura
  • , Takeshi Furukawa
  • , Takashi Wakui
  • , Yuichi Ichikawa
  • , Hiroki Nishibata
  • , Tomoya Sato
  • , Aleksey Gladkov
  • , Long Chun Tao
  • , Takafumi Kawaguchi
  • , Yosuke Baba
  • , Mari Iijima
  • , Haruka Gonda
  • Yasuharu Takeuchi, Rio Nakazato, Hitoshi Odashima, Hideki Ueno

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We report on a new in situ laser spectroscopy technique using superfluid helium and a highly energetic ion beam. In taking advantage of superfluid helium as a host matrix for laser spectroscopy, we were able to develop an extremely low background detection system. The first demonstration using 85 Rb 31+ ion beam (66 MeV/nucleon) accelerated at the RIKEN accelerator facility shows improvement of detection limit by two orders of magnitude. A quantitative evaluation of Rb atoms in the observation region enables an analysis of their optical absorption cross-section in superfluid helium from the fluorescence intensity dependence on ion-beam intensity and applied laser power.

Original languageEnglish
Article number016502
JournalApplied Physics Express
Volume12
Issue number1
DOIs
StatePublished - 1 Jan 2019
Externally publishedYes

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