Photoionization of vibrationally excited molecular hydrogen

Journal Article · Thu Sep 01 04:00:00 EDT 1977 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.16.1124· OSTI ID:7297811

Tai, H; Flannery, M R

Cross sections for the photoionization of H/sub 2/(X /sup 1/..sigma../sup +//sub g/,v/sub i/) in vibrational levels v/sub i/ = 0--14 are determined for a range of photon energies by a two-center treatment in which the derived electronic matrix elements are averaged over the initial and final vibrational states of the molecule and the molecular ion. Very good agreement with available measurements for v/sub i/ = 0 is obtained. Cross sections for the full Franck-Condon array of accessible transitions H/sub 2/(v/sub i/) ..-->.. H/sup +//sub 2/(v/sub f/) are also presented. In the energy range considered, when the 2psigma/sub u/ dissociative state of H/sup +//sub 2/ is inaccessible, substantial contributions (up to 50% for v/sub i/ = 6--10) to the photoionization originate from H/sup +/ atomic ions which are formed via transitions to the vibrational continuum associated with the 1ssigma/sub g/ state of H/sup +//sub 2/. Single-center and fixed-nuclei approximations which permit great simplification to the present treatment are also fully investigated.

• Research Organization: School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332
• OSTI ID: 7297811
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 16:3; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
CROSS SECTIONS
CRYOGENIC FLUIDS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
HYDROGEN
IONIZATION
NONMETALS
PHOTOIONIZATION
VIBRATIONAL STATES