First observation of o-Ps to p-Ps transition and first direct measurement of positronium hyperfine splitting with sub-THz light

Takayuki Yamazaki; Akira Miyazaki; Taikan Suehara; Toshio Namba; Shoji Asai; Tomio Kobayashi; Haruo Saito; Yuichi Urushizaki; Isamu Ogawa; Toshitaka Idehara; Svilen Sabchevski

doi:10.1007/s10751-011-0399-0

First observation of o-Ps to p-Ps transition and first direct measurement of positronium hyperfine splitting with sub-THz light

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

SCI - Physics

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Positronium is an ideal system for the research of the bound state QED. The hyperfine splitting of positronium (Ps-HFS, about 203 GHz) is an important observable but all previous measurements of Ps-HFS had been measured indirectly using Zeeman splitting. There might be the unknown systematic errors on the uniformity of magnetic field. We are trying to measure Ps-HFS directly using sub-THz radiation. We developed an optical system to accumulate high power (about 10 kW) radiation in a Fabry-Pérot resonant cavity and observed the positronium hyperfine transition for the first time.

Original language	English
Pages (from-to)	141-147
Number of pages	7
Journal	Hyperfine Interactions
Volume	212
Issue number	1-3
DOIs	https://doi.org/10.1007/s10751-011-0399-0
Publication status	Published - 2012 Dec

Keywords

Hyperfine splitting
Positronium

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics
Condensed Matter Physics
Physical and Theoretical Chemistry

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10.1007/s10751-011-0399-0

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First observation of o-Ps to p-Ps transition and first direct measurement of positronium hyperfine splitting with sub-THz light. / Yamazaki, Takayuki; Miyazaki, Akira; Suehara, Taikan; Namba, Toshio; Asai, Shoji; Kobayashi, Tomio; Saito, Haruo; Urushizaki, Yuichi; Ogawa, Isamu; Idehara, Toshitaka; Sabchevski, Svilen.

In: Hyperfine Interactions, Vol. 212, No. 1-3, 12.2012, p. 141-147.

Research output: Contribution to journal › Article › peer-review

Yamazaki, Takayuki ; Miyazaki, Akira ; Suehara, Taikan ; Namba, Toshio ; Asai, Shoji ; Kobayashi, Tomio ; Saito, Haruo ; Urushizaki, Yuichi ; Ogawa, Isamu ; Idehara, Toshitaka ; Sabchevski, Svilen. / First observation of o-Ps to p-Ps transition and first direct measurement of positronium hyperfine splitting with sub-THz light. In: Hyperfine Interactions. 2012 ; Vol. 212, No. 1-3. pp. 141-147.

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AU - Suehara, Taikan

AU - Namba, Toshio

AU - Asai, Shoji

AU - Kobayashi, Tomio

AU - Saito, Haruo

AU - Urushizaki, Yuichi

AU - Ogawa, Isamu

AU - Idehara, Toshitaka

AU - Sabchevski, Svilen

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First observation of o-Ps to p-Ps transition and first direct measurement of positronium hyperfine splitting with sub-THz light

Abstract

Keywords

ASJC Scopus subject areas

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