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 GondaYasuharu Takeuchi, Rio Nakazato, Hitoshi Odashima, Hideki Ueno

Research output: Contribution to journalArticle

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
Publication statusPublished - Jan 1 2019

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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    Imamura, K., Matsuo, Y., Kobayashi, W., Egami, T., Sanjo, M., Takamine, A., Fujita, T., Tominaga, D., Nakamura, Y., Furukawa, T., Wakui, T., Ichikawa, Y., Nishibata, H., Sato, T., Gladkov, A., Tao, L. C., Kawaguchi, T., Baba, Y., Iijima, M., ... Ueno, H. (2019). Absolute optical absorption cross-section measurement of Rb atoms injected into superfluid helium using energetic ion beams. Applied Physics Express, 12(1), [016502]. https://doi.org/10.7567/1882-0786/aaf0a9