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Reinvestigation of the electronic transition moment function of the BO B^2Σ^+–X^2Σ^+ band system

Laher, Russ R. and Khakoo, Murtadha A. and Kuzmanović, M. and Antic-Jovanović, A. (2014) Reinvestigation of the electronic transition moment function of the BO B^2Σ^+–X^2Σ^+ band system. Journal of Quantitative Spectroscopy and Radiative Transfer, 140 . pp. 67-74. ISSN 0022-4073. https://resolver.caltech.edu/CaltechAUTHORS:20140605-092719727

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Abstract

The relative intensities of nine emission bands associated with the v′=0v′=0 and 1 vibrational levels of the B^2Σ^+–X^2Σ^+ system of the BO molecule are measured. The integrated relative intensities of the (0, 0), (0, 1), (1, 0) and (1, 1) bands are measured for the first time in this work. The ratios of observed intensities for bands originating from the same upper vibrational level, together with the Franck–Condon factors, q_(v′v″), and r-centroids, r_(v′v″), based on Rydberg–Klein–Rees potential energy curves, derived from the best available spectroscopic data for the B^2Σ^+ and X^2Σ^+ states of ^(11)B^(16)O and ^(10)B^(16)O, are used to reinvestigate the dependence of the electronic transition moment (ETMF), R_e(r), on internuclear distance, r, for the BO B^2Σ^+–X^2Σ^+ band system. The linear expression R_e(r_(v'vv')=k(−1+1.393r_(v′v″)), where k is an arbitrary constant, is derived from our data to describe the measured r-centroid variation of the ETMF for this system over the range 1.23Å≤r≤1.40Å of internuclear distance. The form of this expression is suitable for directly comparing with previous work, and we find excellent agreement with the BO B–X relative ETMF of Robinson and Nicholls [Intensity measurements on the CO^+ comet tail, and the BO α and β molecular band systems. Proc. Phys. Soc. 1960;75:817–25]. Recent radiative-lifetime measurements of the ^(11)BO B state have allowed us to normalize our ETMF to absolute units: Re(r_(v′v″))=0.4672r_(v′v″)−0.3354 (electric dipole moment atomic units), where r_(v′v″) is in Å.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.jqsrt.2014.01.029DOIArticle
http://www.sciencedirect.com/science/article/pii/S0022407314000491PublisherArticle
Additional Information:© 2014 Elsevier Ltd. Received 30 July 2013. Received in revised form 13 January 2014. Accepted 30 January 2014. Available online 7 February 2014. R.R.L. gratefully acknowledges support from NASA's Spitzer Science Center. M.A.K. acknowledges support from the U.S. National Science Foundation. This work was also supported by the Ministry of Science of the Republic of Serbia, Project no.142065. The authors wish to thank G. Sretenović and I.Krstić from the Faculty of Physics, University of Belgrade,for assistance during the experimental work.
Funders:
Funding AgencyGrant Number
NASA Spitzer Science CenterUNSPECIFIED
NSFUNSPECIFIED
Ministry of Science of the Republic of Serbia142065
Subject Keywords: Boron monoxide; BO emission spectrum; BO B 2 Σ + – X 2 Σ + band system; Transition probability parameters; 11B16O and 10B16O Franck–Condon factors and r-centroids; Electronic transition moment function
Record Number:CaltechAUTHORS:20140605-092719727
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140605-092719727
Official Citation:Russ R. Laher, Murtadha A. Khakoo, M. Kuzmanović, A. Antic-Jovanović, Reinvestigation of the electronic transition moment function of the BO B2Σ+–X2Σ+ band system, Journal of Quantitative Spectroscopy and Radiative Transfer, Volume 140, June 2014, Pages 67-74, ISSN 0022-4073, http://dx.doi.org/10.1016/j.jqsrt.2014.01.029. (http://www.sciencedirect.com/science/article/pii/S0022407314000491)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46092
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:05 Jun 2014 17:14
Last Modified:03 Oct 2019 06:40

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