TY - JOUR
T1 - Anisotropic Photodetachment of Positronium Negative Ions with Linearly Polarized Light
AU - Michishio, Koji
AU - Chiari, Luca
AU - Tanaka, Fumi
AU - Nagashima, Yasuyuki
N1 - Publisher Copyright:
© 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
PY - 2024/5/17
Y1 - 2024/5/17
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/85193255753
U2 - 10.1103/PhysRevLett.132.203001
DO - 10.1103/PhysRevLett.132.203001
M3 - Article
C2 - 38829062
AN - SCOPUS:85193255753
SN - 0031-9007
VL - 132
JO - Physical review letters
JF - Physical review letters
IS - 20
M1 - 203001
ER -