Thumbnail
Access Restriction
Open

Author Chang, B. ♦ Sears, T. J.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ BROMINE ♦ INFRARED SPECTRA ♦ METHYLENE RADICALS ♦ SODIUM CHLORIDES ♦ NEAR INFRARED RADIATION ♦ FREQUENCY MODULATION ♦ ROTATIONAL STATES ♦ ELECTRONIC STRUCTURE ♦ LINE SHAPE ♦ MOLECULAR ORIENTATION ♦ PHONON SPECTRA ♦ OPTICAL PHONONS ♦ HIGH-RESOLUTION METHODS ♦ ZERO-POINT ENERGY
Abstract 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.}
ISSN 00219606
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-08-01
Publisher Department Brookhaven National Lab. (BNL), Upton, NY (United States)
Publisher Place United States
Journal Journal of Chemical Physics
Volume Number 105
Issue Number 6
Organization Brookhaven National Lab. (BNL), Upton, NY (United States)


Open content in new tab

   Open content in new tab