skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Linear- and circular-polarization photoionization angular distributions in H{sub 2} and H{sub 2}{sup +} by attosecond xuv laser pulses

Abstract

Numerical solutions of the time-dependent Schroedinger equation, using a new unitary numerical method, are used to obtain gauge-independent photoionization angular distributions for two-dimensional (planar) models of aligned H{sub 2} and H{sub 2}{sup +} molecules in different electronic states. Simulations are performed with few-cycle attosecond (as) extreme-ultraviolet (xuv) laser pulses at wavelengths {lambda}= 10 nm [{omega}= 4.56 a.u. (atomic units), {tau}=2{pi}/{omega}= 1.38 a.u. = 33.4 as], and {lambda}= 5 nm ({omega}= 9.11 a.u., {tau}= 16.7 as) for linear and circular polarization ionizations at R{sub e}=1.675 a.u., where molecular orbital configurations dominate for which the electron wavelengths {lambda}{sub e{>=}}R{sub e} and at large internuclear distance R=10 a.u. ({lambda}{sub e}<R) where Heitler-London atomic configurations including ionic states H{sup +}H{sup -} are more appropriate. The simulations allow one to investigate the effects of electron correlation and entanglement in H{sub 2} at different R due to electron spin exchange as compared to the delocalized one-electron H{sub 2}{sup +} system. An ultrashort (delta function) pulse model is used to interpret interferences in momentum distributions.

Authors:
; ;  [1]
  1. Laboratoire de Chimie Theorique, Faculte des Sciences, Universite de Sherbrooke, Sherbrooke, Quebec, J1K 2R1 (Canada)
Publication Date:
OSTI Identifier:
21544660
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 83; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevA.83.043418; (c) 2011 American Institute of Physics; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANGULAR DISTRIBUTION; DELTA FUNCTION; ELECTRON CORRELATION; EXTREME ULTRAVIOLET RADIATION; HYDROGEN IONS 1 MINUS; HYDROGEN IONS 1 PLUS; HYDROGEN IONS 2 PLUS; INTERATOMIC DISTANCES; LASER RADIATION; MOLECULAR ORBITAL METHOD; NUMERICAL SOLUTION; PHOTOIONIZATION; QUANTUM ENTANGLEMENT; SCHROEDINGER EQUATION; SIMULATION; SPIN EXCHANGE; TWO-DIMENSIONAL CALCULATIONS; WAVELENGTHS; ANIONS; CALCULATION METHODS; CATIONS; CHARGED PARTICLES; CORRELATIONS; DIFFERENTIAL EQUATIONS; DISTANCE; DISTRIBUTION; ELECTROMAGNETIC RADIATION; EQUATIONS; FUNCTIONS; HYDROGEN IONS; IONIZATION; IONS; MATHEMATICAL SOLUTIONS; MOLECULAR IONS; PARTIAL DIFFERENTIAL EQUATIONS; RADIATIONS; ULTRAVIOLET RADIATION; WAVE EQUATIONS

Citation Formats

Yuan, Kai-Jun, Huizhong, Lu, and Bandrauk, Andre D. Linear- and circular-polarization photoionization angular distributions in H{sub 2} and H{sub 2}{sup +} by attosecond xuv laser pulses. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.83.043418.
Yuan, Kai-Jun, Huizhong, Lu, & Bandrauk, Andre D. Linear- and circular-polarization photoionization angular distributions in H{sub 2} and H{sub 2}{sup +} by attosecond xuv laser pulses. United States. doi:10.1103/PHYSREVA.83.043418.
Yuan, Kai-Jun, Huizhong, Lu, and Bandrauk, Andre D. Fri . "Linear- and circular-polarization photoionization angular distributions in H{sub 2} and H{sub 2}{sup +} by attosecond xuv laser pulses". United States. doi:10.1103/PHYSREVA.83.043418.
@article{osti_21544660,
title = {Linear- and circular-polarization photoionization angular distributions in H{sub 2} and H{sub 2}{sup +} by attosecond xuv laser pulses},
author = {Yuan, Kai-Jun and Huizhong, Lu and Bandrauk, Andre D},
abstractNote = {Numerical solutions of the time-dependent Schroedinger equation, using a new unitary numerical method, are used to obtain gauge-independent photoionization angular distributions for two-dimensional (planar) models of aligned H{sub 2} and H{sub 2}{sup +} molecules in different electronic states. Simulations are performed with few-cycle attosecond (as) extreme-ultraviolet (xuv) laser pulses at wavelengths {lambda}= 10 nm [{omega}= 4.56 a.u. (atomic units), {tau}=2{pi}/{omega}= 1.38 a.u. = 33.4 as], and {lambda}= 5 nm ({omega}= 9.11 a.u., {tau}= 16.7 as) for linear and circular polarization ionizations at R{sub e}=1.675 a.u., where molecular orbital configurations dominate for which the electron wavelengths {lambda}{sub e{>=}}R{sub e} and at large internuclear distance R=10 a.u. ({lambda}{sub e}<R) where Heitler-London atomic configurations including ionic states H{sup +}H{sup -} are more appropriate. The simulations allow one to investigate the effects of electron correlation and entanglement in H{sub 2} at different R due to electron spin exchange as compared to the delocalized one-electron H{sub 2}{sup +} system. An ultrashort (delta function) pulse model is used to interpret interferences in momentum distributions.},
doi = {10.1103/PHYSREVA.83.043418},
journal = {Physical Review. A},
issn = {1050-2947},
number = 4,
volume = 83,
place = {United States},
year = {2011},
month = {4}
}