Einstein A coefficients and absolute line intensities have been calculated for the E-2 Pi-X-2 Sigma(+) transition of CaH. Using wavefunctions derived from the Rydberg-Klein-Rees (RKR) method and electronic transition dipole moment functions obtained from high-level ab initio calculations. rotationless transition dipole moment matrix elements have been calculated for all 10 bands involving v' = 0,1 of the E-2 Pi state and v '' = 0,1,2,3,4 of the X-2 Sigma state. The rotational line strength factors (Honl-London factors) are derived for the intermediate coupling case between Hund's case (a) and (b) for the E-2 Pi-X-2 Sigma(+) transition. The computed transition dipole moments and the spectroscopic constants from a recent study [Ram et al., Journal of Molecular Spectroscopy 2011:266:86-91] have been combined to generate line lists containing Einstein A coefficients and absolute line intensities for 10 bands of the E-2 Pi-X-2 Sigma(+) transition of CaH for J-values up to 50.5. The absolute line intensities have been used to determine a rotational temperature of 778 +/- 3 degrees C for the CaH sample in the recent study. (C) 2011 Elsevier Ltd. All rights reserved.
|Number of pages||8|
|Journal||Journal of Quantitative Spectroscopy and Radiative Transfer|
|Publication status||Published - Jan 2012|