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.

引用

页数：6