Resonant two-photon dissociation of HD/sup +/ via Fano formalism

Journal Article · Tue Dec 01 04:00:00 EST 1987 · J. Chem. Phys.; (United States)

OSTI ID:6057856

Chakrabarti, M K; Bhattacharyya, S S; Saha, S

We have studied the resonant two-photon dissociation (TPD) of vibrationally excited HD/sup +/ by both 1ssigma/sub g/..-->..1ssigma/sub g/ vibrational and 1ssigma/sub g/..-->..2psigma/sub u/ electronic transitions. Following Armstrong et al., a quantum mechanical description of the laser field enabled us to define the intermediate resonant state as a ''pseudodissociating state'' of the molecule--radiation system. This makes our theory formally similar to that of single-transition (photon) autoionization problem as formulated by Fano. This similarity has been exploited to obtain the intensity dependent line shapes of the resonant TPD of HD/sup +/. Resonant TPD cross sections from the v/sub i/ = 6, J/sub i/ = 0 level of the ground 1ssigma/sub g/ state of HD/sup +/ are calculated with a linearly polarized infrared laser radiation in the wavelength range 16 530--16 565 A and at different intensities ranging from 1.53 x 10/sup 8/--3.83 x 10/sup 13/ W/cm/sup 2/. Effects of laser intensity on the linewidth, line shift, and cross sections are found to be very different for the two types of transitions. Our previous results of nonresonant TPD cross sections are reproduced via this model.

• Research Organization: Atomic and Molecular Physics Section, Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Calcutta-700 032, India
• OSTI ID: 6057856
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 87:11; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
CATIONS
CHARGED PARTICLES
DEUTERIDES
DEUTERIUM COMPOUNDS
DISSOCIATION
HYDROGEN COMPOUNDS
HYDROGEN DEUTERIDE
IONS
MOLECULAR IONS
MULTI-PHOTON PROCESSES
RESONANCE