Absolute 1* quantum yields for the ICN A state by diode laser gain versus absorption spectroscopy. Semiannual status report
Absolute I* quantum yields were measured as a function of wavelength for room temperature photodissociation of the ICN A state continuum. The temperature yields are obtained by the technique of time-resolved diode laser gain-versus-absorption spectroscopy. Quantum yields are evaluated at seven wavelengths from 248 to 284 nm. The yield at 266 nm is 66.0 +/- 2% and it falls off to 53.4 +/- 2% and 44.0 +/- 4% at 284 and 248 respectively. The latter values are significantly higher than those obtained by previous workers using infrared fluorescence. Estimates of I* quantum yields obtained from analysis of CN photofragment rotational distributions, as discussed by other workers, are in good agreement with the I* yields. The results are considered in conjunction with recent theoretical and experimental work on the CN rotational distributions and with previous I* yield results.
- Research Organization:
- Joint Inst. for Lab. Astrophysics, Boulder, CO (USA)
- OSTI ID:
- 6036047
- Report Number(s):
- N-87-27166; NASA-CR-180344; NAS-1.26:180344
- Country of Publication:
- United States
- Language:
- English
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420300* - Engineering- Lasers- (-1989)