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Anisotropic Photodetachment of Positronium Negative Ions with Linearly Polarized Light
Physical Review Letters ( IF 8.1 ) Pub Date : 2024-05-14 , DOI: 10.1103/physrevlett.132.203001
Koji Michishio 1, 2 , Luca Chiari 2, 3 , Fumi Tanaka 2 , Yasuyuki Nagashima 2
Affiliation  

We report on the anisotropic photodetachment of positronium negative ions, followed by the dissociation into p-wave electrons and positronium atoms, with a linearly polarized laser beam. We have observed a strong recoil effect of the photoelectrons on the translation momentum of the dissociated positronium atoms. With polarization angle-resolved measurements, the asymmetry parameter of the photoemission angular distribution of the ions at a photon energy of 1.165 eV was determined to be 1.97±0.04(stat)±0.07(syst), in agreement with a theoretical prediction. The present method can be applied to explore the unrevealed dissociation dynamics of exotic particle systems and their manipulation with polarized light.

中文翻译:


线性偏振光正电子负离子的各向异性光脱离



p 正电子负离子的各向异性光脱离,然后用线性偏振激光束解离成 p 波电子和正电子原子。我们观察到光电子对离解正电子原子的平移动量有强烈的反冲效应。通过偏振角分辨测量,光子能量为 1.165 eV 时离子的光电发射角分布的不对称参数确定为 1.97±0.04(stat)±0.07(syst) ,与理论预测一致。本方法可用于探索奇异粒子系统的未揭示的解离动力学及其用偏振光的操纵。
更新日期:2024-05-15
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