Rotational branching ratios in N2+: Observation of photon energy dependence by photoelectron spectroscopy

Journal Article · Fri Sep 03 00:00:00 EDT 2004 · Physical Review Letters

OSTI ID:838057

Ohrwall, G ^[1]; Baltzer, P; Bozek, J

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1. LBNL Library

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 1 Sigma +g ( nu = 0)-->X 2 Sigma +g (nu = 0) transition of N2 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 g-->k sigma u ionization channel.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director. Office of Science. Office of Basic Energy Sciences (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 838057
• Report Number(s): LBNL--43470
• 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

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
74 ATOMIC AND MOLECULAR PHYSICS
BRANCHING RATIO
ENERGY DEPENDENCE
IONIZATION
MATRIX ELEMENTS
MULTIPOLES
PHOTOELECTRON SPECTROSCOPY
PHOTOELECTRON SPECTROSCOPY SYNCHROTRON RADIATION NITROGEN HIGH RESOLUTION ROTATIONAL
PHOTONS
RESONANCE
SHAPE