Formation of metastable atomic hydrogen in the 2s state from symmetry-resolved doubly excited states of molecular hydrogen

Journal Article · Tue Nov 15 04:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.053401· OSTI ID:22093551

Odagiri, Takeshi; Kumagai, Yoshiaki; Nakano, Motoyoshi; Tanabe, Takehiko; Kitajima, Masashi; Kouchi, Noriyuki ^[1]; Suzuki, Isao H. ^[2]

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1. Department of Chemistry, Tokyo Institute of Technology, Tokyo 152-8551 (Japan)
2. National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8568 (Japan)

The cross sections for the formation of the metastable atomic hydrogen in the 2s state in photoexcitation of H{sub 2} and D{sub 2} were measured as a function of the incident photon energy in the range of the doubly excited states with their symmetries of the electronic states, {sup 1}{Sigma}{sub u}{sup +} or {sup 1}{Pi}{sub u}, being resolved. It has turned out from the comparison with the cross-section curves for other dissociation processes and the theoretical calculation [J. D. Bozek et al., J. Phys. B 39, 4871 (2006)] that the Q{sub 2}{sup 1}{Pi}{sub u}(1) doubly excited state of H{sub 2} dissociates into both H(2s) + H(2p) and H(2p) + H(2p). The dissociation dynamics of this state has been discussed in terms of the nonadiabatic transition during neutral dissociations.

• OSTI ID: 22093551
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 84; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
COMPARATIVE EVALUATIONS
CROSS SECTIONS
DEUTERIUM
DISSOCIATION
ELECTRONIC STRUCTURE
EXCITED STATES
HYDROGEN
METASTABLE STATES
PHOTON-MOLECULE COLLISIONS
PHOTONS
SYMMETRY