High resolution near-infrared electronic spectroscopy of HCBr
- Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)
The rotationally resolved spectrum of the HCBr {tilde {ital A}}{sup 1}{ital A}{double_prime}(0,2,0){l_arrow}{tilde {ital X}}{sup 1}{ital A}{prime}(0,0,0) {ital K}{sub {ital a}}=0{l_arrow}1 transition between 12760 and 12850 cm{sup {minus}1} was obtained for the first time at Doppler-limited resolution using a transient frequency-modulation absorption technique. Rotational structure of HC{sup 79}Br and HC{sup 81}Br was identified and analyzed. The analysis shows {ital R}{double_prime}(C{endash}Br)=1.85{sub 2} A and {ital R}{prime}(C{endash}Br)=1.74{sub 9} A. The observed band indicates a linear{endash}bent transition. This yields an upper limit of approximately 1600 cm{sup {minus}1} for the barrier to linearity above the zero-point energy for the {tilde {ital A}}{sup 1}{ital A}{double_prime} state. Perturbations caused by singlet{endash}triplet interactions were also found in the observed spectrum. The analysis of these perturbations indicates a very low-lying {tilde {ital a}}{sup 3}{ital A}{double_prime} state. {copyright} {ital 1996 American Institute of Physics.}
- Research Organization:
- Brookhaven National Laboratory
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 286320
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 6 Vol. 105; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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