First observation of o-Ps to p-Ps transition and first direct measurement of positronium hyperfine splitting with sub-THz light
First observation of o-Ps to p-Ps transition and first direct measurement of positronium hyperfine splitting with sub-THz light
复制标题
首次观察到 o-Ps 到 p-Ps 的跃迁，并首次用亚太赫兹光直接测量正电子素超精细分裂
DOI：
10.1007/s10751-011-0399-0
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
S.Sabchevski
中科院分区：
文献类型：
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作者：
T.Yamazaki;A.Miyazaki;T.Suehara;T.Namba;S.Asai;T.Kobayashi;H.Saito;Y.Urushizaki;I.Ogawa;T.Idehara;S.Sabchevski
电子偶素是研究束缚态QED的理想体系。正电子素的超精细分裂（Ps-HFS，约203 GHz）是一个重要的观测，但所有以前的测量Ps-HFS已间接测量塞曼分裂。磁场均匀性可能存在未知的系统误差。我们正在尝试使用亚太赫兹辐射直接测量Ps-HFS。我们研制了一套在法布里-珀罗谐振腔中积累高功率（约10 kW）辐射的光学系统，并首次观测到了正电子素超精细跃迁。
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.