Journal
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Volume 39, Issue 6, Pages L119-L126Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-4075/39/6/L03
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Predissociation of the (N2+C2)Sigma(+)(u)(nu ') vibrational levels with v ' >= 3 was observed via dispersed C-2 Sigma(+)(u) -> X-2 Sigma(+)(g) fluorescence in the spectral range of 165-208 nm after resonant 1s(-1)pi*(nu(r)) excitation of N-2 and its subsequent autoionization into the N-2(+) C state. This range is dominated by lines in atomic nitrogen, by overlapped C (2)Sigma(+)(u)(nu ') -> X (2)Sigma(+)(g)(nu '') vibrational band sequences with Delta nu = const and broad unresolved band systems (D, (2)) (2)Pi(g)(nu ') -> A (2)Pi(u)(nu '') in the N-2(+) molecular ion. With very high fluorescence resolution of about 0.1 nm FWHM individual C 2 Sigma(+)(u)(nu ') -> X (2)Sigma(+)(g)(nu '') vibrational bands have been resolved. Calculation of the observed fluorescence spectra by taking into account predissociation and molecular rotation describes well the shape of both individual vibrational bands C (2)Sigma(+)(u)(nu ') -> X (2)Sigma(+)(g)(nu '') and the wholeband system.
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