Radiative lifetimes of the CN (A 2 Pi i) electronic state

Details Radiative lifetimes of the CN (A 2 Pi i) electronic state Radiative lifetimes of the CN (A 2 Pi i) electronic state

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...395..710l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 395, no. 2, Aug. 20, 1992, p. 710-714. Research supported by Howard Univers

Physics

Atomic Physics

10

Cn Emission, Electron States, Photolysis, Radiative Lifetime, Red Giant Stars, Vibrational Spectra, Astronomical Spectroscopy, Ground State, Quenching (Atomic Physics)

Scientific paper

Radiative lifetimes have been measured for CN (A 2 Pi i v-prime = 2...7). Ground-state radicals formed in the 193 nm photolysis of C2N2 and ClCN were excited to A 2 Pi i v-prime = 2...7 vibrational levels. The decay was monitored by following the fluorescence. Cascading effects were eliminated by working at low pressures and monitoring emission from a single vibrational band. Quenching rates and zero-pressure radiative lifetimes were obtained from Stern-Volmer plots. The lifetimes are significantly lower than previous measurements and theoretical calculations for vibrational states v-prime over 2.

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