Research output: Contribution to journal › Article

**Einstein A-values and oscillator strengths of the A ^{2}Π-X^{2}Σ^{+} system of CP.** / Ram, R. S.; Brooke, J. S A; Western, C. M.; Bernath, P. F.

Research output: Contribution to journal › Article

Ram, RS, Brooke, JSA, Western, CM & Bernath, PF 2014, 'Einstein A-values and oscillator strengths of the A^{2}Π-X^{2}Σ^{+} system of CP', *Journal of Quantitative Spectroscopy and Radiative Transfer*, vol. 138, pp. 107-115. https://doi.org/10.1016/j.jqsrt.2014.01.030

Ram, R. S., Brooke, J. S. A., Western, C. M., & Bernath, P. F. (2014). Einstein A-values and oscillator strengths of the A^{2}Π-X^{2}Σ^{+} system of CP. *Journal of Quantitative Spectroscopy and Radiative Transfer*, *138*, 107-115. https://doi.org/10.1016/j.jqsrt.2014.01.030

Ram RS, Brooke JSA, Western CM, Bernath PF. Einstein A-values and oscillator strengths of the A^{2}Π-X^{2}Σ^{+} system of CP. Journal of Quantitative Spectroscopy and Radiative Transfer. 2014 May 1;138:107-115. https://doi.org/10.1016/j.jqsrt.2014.01.030

@article{06c30590e7dc40a981fffc2c60dc4902,

title = "Einstein A-values and oscillator strengths of the A2Π-X2Σ+ system of CP",

abstract = "Line strengths for bands of the A2Π-X2σ+ transition of CP, including the effect of rotation on the vibrational wavefunctions (the Herman-Wallis effect), have been calculated using Western's PGOPHER program and Le Roy's LEVEL program. The potential energy functions for the A2Π and X2Σ+ state were computed using spectroscopic constants obtained from high resolution spectra. The RKR potentials of the two states, and the electronic transition dipole moments of this transition calculated in a recent ab initio study have been used in Le Roy's LEVEL program to produce transition dipole moment matrix elements. The matrix elements have been converted from Hund's case (b) to (a), and then used in PGOPHER to generate a line list containing observed and calculated wavenumbers, Einstein A coefficients and f-values for 75 bands with v=0-8 for both states. The Einstein A coefficients have been used to compute radiative lifetimes for v=0-5 in the A2Π state. The line list may be useful for computing the molecular opacities of CP needed to simulate the spectra of stellar and substellar sources.",

keywords = "Carbon stars, Einstein A coefficients, Line strengths, Oscillator strengths",

author = "Ram, {R. S.} and Brooke, {J. S A} and Western, {C. M.} and Bernath, {P. F.}",

year = "2014",

month = "5",

day = "1",

doi = "10.1016/j.jqsrt.2014.01.030",

language = "English",

volume = "138",

pages = "107--115",

journal = "Journal of Quantitative Spectroscopy and Radiative Transfer",

issn = "0022-4073",

publisher = "Pergamon Press",

}

TY - JOUR

T1 - Einstein A-values and oscillator strengths of the A2Π-X2Σ+ system of CP

AU - Ram, R. S.

AU - Brooke, J. S A

AU - Western, C. M.

AU - Bernath, P. F.

PY - 2014/5/1

Y1 - 2014/5/1

N2 - Line strengths for bands of the A2Π-X2σ+ transition of CP, including the effect of rotation on the vibrational wavefunctions (the Herman-Wallis effect), have been calculated using Western's PGOPHER program and Le Roy's LEVEL program. The potential energy functions for the A2Π and X2Σ+ state were computed using spectroscopic constants obtained from high resolution spectra. The RKR potentials of the two states, and the electronic transition dipole moments of this transition calculated in a recent ab initio study have been used in Le Roy's LEVEL program to produce transition dipole moment matrix elements. The matrix elements have been converted from Hund's case (b) to (a), and then used in PGOPHER to generate a line list containing observed and calculated wavenumbers, Einstein A coefficients and f-values for 75 bands with v=0-8 for both states. The Einstein A coefficients have been used to compute radiative lifetimes for v=0-5 in the A2Π state. The line list may be useful for computing the molecular opacities of CP needed to simulate the spectra of stellar and substellar sources.

AB - Line strengths for bands of the A2Π-X2σ+ transition of CP, including the effect of rotation on the vibrational wavefunctions (the Herman-Wallis effect), have been calculated using Western's PGOPHER program and Le Roy's LEVEL program. The potential energy functions for the A2Π and X2Σ+ state were computed using spectroscopic constants obtained from high resolution spectra. The RKR potentials of the two states, and the electronic transition dipole moments of this transition calculated in a recent ab initio study have been used in Le Roy's LEVEL program to produce transition dipole moment matrix elements. The matrix elements have been converted from Hund's case (b) to (a), and then used in PGOPHER to generate a line list containing observed and calculated wavenumbers, Einstein A coefficients and f-values for 75 bands with v=0-8 for both states. The Einstein A coefficients have been used to compute radiative lifetimes for v=0-5 in the A2Π state. The line list may be useful for computing the molecular opacities of CP needed to simulate the spectra of stellar and substellar sources.

KW - Carbon stars

KW - Einstein A coefficients

KW - Line strengths

KW - Oscillator strengths

UR - http://www.scopus.com/inward/record.url?scp=84896769761&partnerID=8YFLogxK

U2 - 10.1016/j.jqsrt.2014.01.030

DO - 10.1016/j.jqsrt.2014.01.030

M3 - Article

AN - SCOPUS:84896769761

VL - 138

SP - 107

EP - 115

JO - Journal of Quantitative Spectroscopy and Radiative Transfer

JF - Journal of Quantitative Spectroscopy and Radiative Transfer

SN - 0022-4073

ER -