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 · Sat Jul 15 00:00:00 EDT 1989 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.40.735· OSTI ID:5961772

Sen, N; Rai Dastidar, K; Rai Dastidar, T K

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), Vol. 40:2
• Country of Publication: United States
• Language: English

Related Subjects

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