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Effect of laser intensity on (3+1)-photon resonant enhanced multiphoton ionization of a H/sub 2/ molecule via the /ital B//sup /prime// /sup 1//Sigma//sub u/ state

Journal Article · · Phys. Rev. A; (United States)
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The effect of laser intensity on the branching ratios for the vibrational distribution of a H/sub 2//sup +/ ion and the corresponding photoelectron angular distribution for the (3+1)-photon ionization of a H/sub 2/ molecule via the /ital B//prime/ /sup 1//Sigma//sub u/ state have been studied. The branching ratios at the electron scattering angle /theta/=0/degree/ and the asymmetry parameters for photoelectron angular distribution have been calculated in the range of 10/sup 8/--10/sup 12/-W/cm/sup 2/ laser intensity. For ionization via different vibrational levels (/ital v//sub /ital i//=0,1,2) of the /ital B//prime/ /sup 1//Sigma//sub u/ state, the laser-intensity dependence of the branching ratios is prominent in the range 10/sup 10/--10/sup 12/ W/cm/sup 2/, although the peak of the distribution remains always at /Delta//ital v/=0, i.e., /ital v//sub /ital i//=v/sub I/ (/ital v//sub /ital I// is the vibrational level of the ion). Our results have been compared with experimental data of Pratt, Dehmer, and Dehmer (J. Chem. Phys. 85, 3379 (1986); 86, 1727 (1987)).

Research Organization:
Indian Association for the Cultivation of Science, Calcutta 700 032, India (IN)
OSTI ID:
5961772
Journal Information:
Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 40:2; ISSN PLRAA
Country of Publication:
United States
Language:
English

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Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
CATIONS
CHARGED PARTICLES
COLLISIONS
CORRELATIONS
DISTRIBUTION
ELECTRON EMISSION
ELEMENTS
EMISSION
ENERGY LEVELS
EXCITED STATES
FLUX DENSITY
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 2 PLUS
IONIZATION
IONS
MOLECULAR IONS
MOLECULE COLLISIONS
NONMETALS
PHOTOIONIZATION
PHOTON COLLISIONS
PHOTON-MOLECULE COLLISIONS
VIBRATIONAL STATES