Anisotropic Photodetachment of Positronium Negative Ions with Linearly Polarized Light

被引：2
作者：
Michishio, Koji [1 ,2 ]
Chiari, Luca [2 ,3 ]
Tanaka, Fumi [2 ]
Nagashima, Yasuyuki [2 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, 1-1-1 Umezono, Tsukuba, Ibaraki 3058568, Japan
[2] Tokyo Univ Sci, Dept Phys, 1-3 Kagurazaka,Shinjuku Ku, Tokyo 1628601, Japan
[3] Chiba Univ, Fac Engn, Dept Appl Chem & Biotechnol, 1-33 Yayoi, Inage, Chiba 2638522, Japan
来源：
PHYSICAL REVIEW LETTERS | 2024年 / 132卷 / 20期
关键词：
SCATTERING; ASYMMETRY; DYNAMICS; BEAM;
D O I：
10.1103/PhysRevLett.132.203001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
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页数：6
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