EINSTEIN A COEFFICIENTS AND OSCILLATOR STRENGTHS FOR THE A2Π-X2Σ+ (RED) AND B2Σ+-X2Σ+ (VIOLET) SYSTEMS AND ROVIBRATIONAL TRANSITIONS IN THE X2Σ+ STATE OF CN

Line strengths have been calculated in the form of Einstein A coefficients and f-values for a large number of bands of the A(2)Pi-X-2 Sigma(+) and B-2 Sigma(+)-X-2 Sigma(+) systems and rovibrational transitions within the X-2 Sigma(+) state of CN using Western's pgopher program. The J dependence of the transition dipole moment matrix elements (the Herman-Wallis effect) has been taken into account. Rydberg-Klein-Rees potential energy functions for the A(2)Pi, B-2 Sigma(+), and X-2 Sigma(+) states were computed using spectroscopic constants from the A(2)Pi-X-2 Sigma(+) and B-2 Sigma(+)-X-2 Sigma(+) transitions. New electronic transition dipole moment functions for these systems and a dipole moment function for the X-2 Sigma(+) state were generated from high level ab initio calculations and have been used in Le Roy's level program to produce transition dipole moment matrix elements (including their J dependence) for a large number of vibrational bands. The program pgopher was used to calculate Einstein A coefficients, and a line list was generated containing the observed and calculated wavenumbers, Einstein A coefficients and f-values for 290 bands of the A(2)Pi-X-2 Sigma(+) transition with v' = 0-22, v '' = 0-15, 250 bands of the B-2 Sigma(+)-X-2 Sigma(+) transition with v' = 0-15, v '' = 0-15 and 120 bands of the rovibrational transitions within the X-2 Sigma(+) state with v = 0-15. The Einstein A coefficients have been used to compute radiative lifetimes of several vibrational levels of the A(2)Pi and B-2 Sigma(+) states and the values compared with those available from previous experimental and theoretical studies.