The first direct observation of positronium hyperfine splitting

Taikan Suehara, Takayuki Yamazaki, Akira Miyazaki, Ginga Akimoto, Akira Ishida, Toshio Namba, Shoji Asai, Tomio Kobayashi, Haruo Saito, Toshitaka Idehara, Isamu Ogawa, Svilen Sabchevski

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

The direct transition from ortho-positronium to para-positronium with high-power sub-THz radiation has been observed with 5.1 σ significance. The observed transition rate is consistent with the theoretical calculation. A sub-THz gyrotron is used as the light source, and a quasi-optical Fabry-Perot cavity is utilized to accumulate the radiation. This is the first observation of the positronium hyperfine splitting (Ps-HFS), which leads to the first direct measurement of Ps-HFS with a target accuracy of 100 ppm in several years.

本文言語英語
ホスト出版物のタイトル19th Particles and Nuclei International Conference, PANIC11
ページ549-551
ページ数3
DOI
出版ステータス出版済み - 2012
外部発表はい
イベント19th Particles and Nuclei International Conference, PANIC11 - Cambridge, MA, 米国
継続期間: 7 24 20117 29 2011

出版物シリーズ

名前AIP Conference Proceedings
1441
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

その他

その他19th Particles and Nuclei International Conference, PANIC11
国/地域米国
CityCambridge, MA
Period7/24/117/29/11

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)

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