using a Fourier transform spectrometer. The CrD molecules were formed in a chromium hollow cathode lamp operated with neon gas and a trace of deuterium. Compared with the previous work on this molecule the present spectra provide greatly improved measurements of line positions and allow the analysis of several new bands. The rotational analysis of the 0-1, 0-0, 1-0, and 1-2 bands has been performed providing the following principal molecular constants for the ground X(6) Sigma(+) state: omega e = 1183.1958(21) cm(-1), omega(e)x(e) = 15.6006(9) cm(-1), B-e = 3.175443(21) cm(-1), and r(e) = 1.654730(5) Angstrom. The excited A(6) Sigma(+) state, with principal constants T-00 = 11559.7206(6) cm(-1), Delta G(1/2) = 1066.4202(10) cm(-1), B-e = 2.762705(13) cm(-1), and r(e) = 1.774034(4) Angstrom, is involved in several perturbations. The observed perturbations in the upsilon = 0 and upsilon = 1 vibrational levels are similar to those observed previously in the upsilon = 0 vibrational level of the A(6) Sigma(+) state of CrH. These perturbations arise from interactions with a nearby a(4) Sigma(+) state with preliminary molecular constants: T-00 = 11 176 cm(-1), B-e = 3.19 cm(-1). This state located below the A(6) Sigma(+) state and is the lowest excited state of this molecule, supporting the conclusions of our previous work on CrH. (C) 1995 Academic Press, Inc.
|Number of pages||11|
|Journal||JOURNAL OF MOLECULAR SPECTROSCOPY|
|Publication status||Published - Jul 1995|
- TRANSITION-METAL HYDRIDES