First millimeter-wave spectroscopy of ground-state positronium
First millimeter-wave spectroscopy of ground-state positronium
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DOI：
10.1093/ptep/ptu181
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发表时间：
2015-01-01
影响因子：
3.5
通讯作者：
Idehara, T.
中科院分区：
文献类型：
--
作者：
Miyazaki, A.;Yamazaki, T.;Idehara, T.
我们报道了从正正电子到准正电子跃迁的bret - wigner共振的首次测量。我们已经开发了一种光学系统，使用频率可调回旋管和法布里-珀罗腔来积累超过20千瓦的功率。该系统开辟了毫米波光谱的新时代，使我们能够直接确定para-Ps的超精细间隔和衰减宽度。
We report on the first measurement of the Breit-Wigner resonance of the transition from ortho-positronium to para-positronium. We have developed an optical system to accumulate a power of over 20kW using a frequency-tunable gyrotron and a Fabry-Perot cavity. This system opens a new era of millimeter-wave spectroscopy, and enables us to directly determine both the hyperfine interval and the decay width of para-Ps.