ISSN:
0377-0486
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
We have recorded high-resolution resonance Raman spectra of the bromine molecule in its natural abundance and as pure isotopic molecules 79Br2 and 81Br2 with excitation by light which is in resonance with the continuum of the B(3Πou+)-state. The observed spectra are characterized by a progression of vibrational lines up to the tenth harmonic. These lines display complex structure which can be explained in terms of Q branches, S band heads, unresolved O branches and vibrational ‘hot’ bands. The assignment of all observed lines is based on Fortrat diagrams which have been calculated by using spectroscopic constants derived from high resolution absorption spectra and on depolarization measurements. The vibrational constants ωe, ωexe and ωeye and the rotational constants Be and αe for the X (1Σg+)-state of bromine were determined independently from the Raman spectra. Variations of the spectral band shape of the fundamental and the overtones were observed using five different exciting lines of the argon ion laser. The band shapes were also studied while changing the laser power which affects the spectroscopic temperature. A qualitative discussion of the observed changes is given.
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jrs.1250030406
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