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Linewidth dependence of quasi-stationary states in large molecules

Authors
Journal
Chemical Physics Letters
0009-2614
Publisher
Elsevier
Publication Date
Volume
21
Issue
1
Identifiers
DOI: 10.1016/0009-2614(73)80020-x

Abstract

Abstract We study the quasi-stationary states, or eigenstates, of the decay matrix for a system described by one single vibronic state |s〉 coupled to a manifold { l}, both |s〉 and { l} levels being coupled to separate continua which endow them with finite linewidths γ s , γ l . When all the zero-order states have the same linewidth (not necessarily zero) the quasi-stationary states are identical to the molecular eigenstates; when the difference between the linewidths γ s − γ l is large enough, the zero-order sets (s, { l}) are completely decoupled, a result which has been established for the two-level system. We indicate some consequences of collisional broadening involving pressure effects in the gas phase.

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