CALCULATION OF (CO)-C-12-O-16 AND (CO)-C-13-O-16 X(1)SIGMA+ ROVIBRATIONAL INTENSITIES FOR UPSILON-LESS-THAN-OR-EQUAL-TO-20 AND J-LESS-THAN-OR-EQUAL-TO-150

Improved electric dipole transition matrix elements for rovibrational transitions in the ground state X1SIGMA+ of (CO)-C-12-O-16 and (CO)-C-13-O-16 are calculated for all the DELTAv = +1, +2, and +3 transitions for which v less-than-or-equal-to 20 and J less-than-or-equal-to 150. We have fitted polynomials to these matrix elements as a function of the parameter m which is defined in terms of the lower state angular momentum quantum number J. These convenient to use polynomial representations are given in Tables 1-4 for (CO)-C-12-O-16 and in Tables 5-8 for (CO)-C-13-O-16. We observe that there is intensity enhancement due to vibration-rotation interaction for the P-branch transitions at the expense of the R-branch transitions for DELTAv = +1. This enhancement can be as large as 40% at the highest J, For the DELTAv = +2 and +3 transitions, the R-branch transitions are enhanced by as much as a factor of 2.75 and 10 at the highest J, respectively. The P-branch transitions exhibit only minor decreases. Comparisons with previous calculations show good agreement for the DELTAv = +1 transitions. The comparison for DELTAv = +2 and +3 transitions show differences as large as a factor of 5.