Global Franck-Condon breakdown resulting from Cooper minima

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.76.2666· OSTI ID:284485

Rao, R M; Poliakoff, E D ^[1]; Wang, K; McKoy, V ^[2]

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1. Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803 (United States)
2. Arthur Amos Noyes Laboratory of Chemical Physics, Californian Institute of Technology, Pasadena, California 91125 (United States)

Using N{sub 2} 2{sigma}{sub {ital u}}{sup {minus}1} photoionization as an example, we present the first measurements and calculations of photoion vibrational distributions for an extended energy range (5{le}{ital E}{sub {ital k}}{le}230 eV). The results show a striking breakdown of the Franck-Condon approximation over a 100 eV range. We show that this coupling between vibrational and electronic motion arises from a dependence of Cooper minima on molecular bond length. Based on this mechanism, the effect is expected to be common for molecular systems. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 284485
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 76; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BOND LENGTHS
BREAKDOWN
COOPER PAIRS
COUPLING
ENERGY DEPENDENCE
FRANCK-CONDON PRINCIPLE
MOLECULES
NITROGEN
NITROGEN MOLECULES
PHOTOIONIZATION
VIBRATIONAL STATES