Journal
PHYSICAL REVIEW A
Volume 80, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.80.011403
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Funding
- U. S. Department of Energy
- U. S. National Science Foundation
- National Science Council of Taiwan [97-2112-M-002-003MY3]
- National Taiwan University [97R0066]
- Direct For Mathematical & Physical Scien
- Division Of Physics [0757194] Funding Source: National Science Foundation
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We perform an ab initio study of multiphoton ionization (MPI) of carbon dioxide in intense linearly polarized laser pulses with arbitrary molecular orientation by means of a time-dependent density-functional theory (TDDFT) with proper long-range potential. We develop a time-dependent Voronoi-cell finite difference method with highly adaptive molecular grids for accurate solution of the TDDFT equations. Our results demonstrate that the orientation dependence of MPI is determined by multiple orbital contributions and that the electron correlation effects are significant. The maximum peak of MPI is predicted to be at 40 in good agreement with recent experimental data. Photoelectron angular distribution reveals the delicate relation between the orientation dependence and the molecular orbital symmetry.
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