@article{a228dbd689ec4bdca35ba363d7e000df, title = "Einstein A coefficients and oscillator strengths for the A 2Π-X2Σ+ (red) and B 2Σ+-X2Σ+ (violet) systems and rovibrational transitions in the X2Σ+ state of CN", abstract = "Line strengths have been calculated in the form of Einstein A coefficients and f-values for a large number of bands of the A 2Π-X 2Σ+ and B 2Σ+-X 2Σ+ systems and rovibrational transitions within the X 2Σ+ 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 2Π, B 2Σ+ , and X 2Σ+ states were computed using spectroscopic constants from the A 2Π-X 2Σ+ and B 2Σ+-X 2Σ+ transitions. New electronic transition dipole moment functions for these systems and a dipole moment function for the X 2Σ+ 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 2Π-X 2Σ + transition with v′ = 0-22, v″ = 0-15, 250 bands of the B 2Σ+-X 2Σ+ transition with v′ = 0-15, v″ = 0-15 and 120 bands of the rovibrational transitions within the X 2Σ+ state with v = 0-15. The Einstein A coefficients have been used to compute radiative lifetimes of several vibrational levels of the A 2Π and B 2Σ + states and the values compared with those available from previous experimental and theoretical studies.", keywords = "astronomical databases: miscellaneous, methods: laboratory: molecular, molecular data, opacity, stars: abundances, techniques: spectroscopic", author = "Brooke, {James S A} and Ram, {Ram S.} and Western, {Colin M.} and Gang Li and Schwenke, {David W.} and Bernath, {Peter F.}", year = "2014", month = "2", day = "1", doi = "10.1088/0067-0049/210/2/23", language = "English", volume = "210", journal = "Astrophysical Journal Supplement Series", issn = "0067-0049", publisher = "American Astronomical Society", number = "2", }