Research output: Contribution to journal › Article

**Einstein A coefficients and oscillator strengths for the A ^{2}Π-X^{2}Σ^{+} (red) and B ^{2}Σ^{+}-X^{2}Σ^{+} (violet) systems and rovibrational transitions in the X^{2}Σ^{+} state of CN.** / Brooke, James S A; Ram, Ram S.; Western, Colin M.; Li, Gang; Schwenke, David W.; Bernath, Peter F.

Research output: Contribution to journal › Article

Brooke, JSA, Ram, RS, Western, CM, Li, G, Schwenke, DW & Bernath, PF 2014, 'Einstein A coefficients and oscillator strengths for the A ^{2}Π-X^{2}Σ^{+} (red) and B ^{2}Σ^{+}-X^{2}Σ^{+} (violet) systems and rovibrational transitions in the X^{2}Σ^{+} state of CN', *Astrophysical Journal Supplement Series*, vol. 210, no. 2, 23. https://doi.org/10.1088/0067-0049/210/2/23

Brooke, J. S. A., Ram, R. S., Western, C. M., Li, G., Schwenke, D. W., & Bernath, P. F. (2014). Einstein A coefficients and oscillator strengths for the A ^{2}Π-X^{2}Σ^{+} (red) and B ^{2}Σ^{+}-X^{2}Σ^{+} (violet) systems and rovibrational transitions in the X^{2}Σ^{+} state of CN. *Astrophysical Journal Supplement Series*, *210*(2), [23]. https://doi.org/10.1088/0067-0049/210/2/23

Brooke JSA, Ram RS, Western CM, Li G, Schwenke DW, Bernath PF. Einstein A coefficients and oscillator strengths for the A ^{2}Π-X^{2}Σ^{+} (red) and B ^{2}Σ^{+}-X^{2}Σ^{+} (violet) systems and rovibrational transitions in the X^{2}Σ^{+} state of CN. Astrophysical Journal Supplement Series. 2014 Feb 1;210(2). 23. https://doi.org/10.1088/0067-0049/210/2/23

@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",

}

TY - JOUR

T1 - 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

AU - Brooke, James S A

AU - Ram, Ram S.

AU - Western, Colin M.

AU - Li, Gang

AU - Schwenke, David W.

AU - Bernath, Peter F.

PY - 2014/2/1

Y1 - 2014/2/1

N2 - 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.

AB - 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.

KW - astronomical databases: miscellaneous

KW - methods: laboratory: molecular

KW - molecular data

KW - opacity

KW - stars: abundances

KW - techniques: spectroscopic

UR - http://www.scopus.com/inward/record.url?scp=84893204118&partnerID=8YFLogxK

U2 - 10.1088/0067-0049/210/2/23

DO - 10.1088/0067-0049/210/2/23

M3 - Article

AN - SCOPUS:84893204118

VL - 210

JO - Astrophysical Journal Supplement Series

JF - Astrophysical Journal Supplement Series

SN - 0067-0049

IS - 2

M1 - 23

ER -