Spectroscopic study of the second sup 3. Pi. sub g state of H sub 2 : A bound triplet state perturbed by a doubly excited state

Journal Article · Wed Feb 14 23:00:00 EST 1990 · Journal of Chemical Physics; (USA)

DOI:https://doi.org/10.1063/1.458014· OSTI ID:6904103

Lembo, L J; Bjerre, N; Huestis, D L; Helm, H ^[1]

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1. Molecular Physics Laboratory, SRI International, Menlo Park, California 94025 (US)

A double-resonance technique is employed to measure the positions of energy levels of the second {sup 3}{Pi}{sub {ital g}} state of H{sub 2}. Vibrational levels of this state with {ital v}{gt}3 lie above the ionization threshold of H{sup +}{sub 2}, and are observed both to autoionize and dissociate. This state, 2{sup 3}{Pi}{sub {ital g}}, arises from the homogeneous interaction between the singly excited 1{ital s}{sigma}{sub {ital g}}3{ital d}{pi}{sub {ital g}} and 1{ital s}{sigma}{sub {ital g}}4{ital d}{pi}{sub {ital g}} diabatic Rydberg states with the core-excited 2{ital p}{sigma}{sub {ital u}}2{ital p}{pi}{sub {ital u}} state. The energy-level spacings are in good agreement with a simple model calculation for the interacting potentials. We also include a listing of autoionizing levels lying in the same energy range.

• OSTI ID: 6904103
• Journal Information: Journal of Chemical Physics; (USA), Journal Name: Journal of Chemical Physics; (USA) Vol. 92:4; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
AUTOIONIZATION
DISSOCIATION
DOUBLE RESONANCE METHODS
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY LEVELS
EXCITED STATES
HYDROGEN
IONIZATION
NONMETALS
PHOTOIONIZATION
RYDBERG STATES