Rotational Branching Ratios in N{sup +}{sub 2} : Observation of Photon Energy Dependence by Photoelectron Spectroscopy
- Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala (Sweden)
- Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)
Rotational line profiles have been studied as a function of photon energy by use of photoelectron spectroscopy. The relative squared multipole moment matrix elements of the X {sup 1}{Sigma}{sup +}{sub g} ({nu}=0){r_arrow}X {sup 2}{Sigma}{sup +}{sub g} ({nu}=0) transition of N{sub 2} have been determined from the relative intensities of rotational branches for photon energies between 23 and 65 eV. The relative intensities, and hence the multipole moment matrix elements of the rotational branches, are clearly dependent on photon energy. This non-Franck-Condon-like behavior can be explained by a shape resonance in the 3{sigma}{sub g}{r_arrow}k{sigma}{sub u} ionization channel. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 643557
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 81; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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