Matrix effects on radiative and radiationless rates of NBr b1Σ+ and a1Δ trapped in solid argon

Article abstract of DOI:10.1063/1.453455

NBr in solid argon has been excited to the b¹Σ⁺ state with a pulsed tunable dye laser.In addition to the well-known fluorescence spectrum of the b state, infrared emission from the vibrationally relaxed a ¹Δ state was detected at 1086 nm.Three major trapping sites were resolved in absorption and fluorescence excitation spectra of the b-X system.Additional sites could be identified in the excitation spectrum of the a state, which is populated via the b state by internal conversion.There is a weak site elfect on the lifetime of the vibrationally relaxed b state, which varies between 40 and 30 μs.Vibrational relaxation rates in the b state show a stronger site dependence.Internal conversion from b ¹Σ⁺ to a ¹Δ accounts for < 0.1percent to at least 17percent of the decay rate of NBr b ¹Σ⁺, v = 0.Orbitally forbidden transitions to the X₁0₊ component of the ground state were identified 23.0 to 25.5 cm^-1 on the high-energy side of the more intense a ¹Δ <*> X₂1<*> transition of several sites.The lifetime of the a state varies between 152 <*> 12 ms in the least perturbed site and 121 <*> 15 ms in the site with the strongest a ¹Δ <*>X₁0⁺ forbidden component.NBr trapped in double vacancies of pure fcc argon, of single stacking faults, and of multiple stacking faults ( hcp pockets ) in argon, can account for the sites.

Full text of DOI:10.1063/1.453455

Matrix effects on radiative and radiationless rates of NBr b 1Σ+ and a 1Δ trapped in
solid argon
A. C. Becker, K.P. Lodemann, and Ulrich Schurath
Citation: The Journal of Chemical Physics 87, 6266 (1987); doi: 10.1063/1.453455
View online: http://dx.doi.org/10.1063/1.453455
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/87/11?ver=pdfcov
Published by the AIP Publishing
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132.206.205.6 On: Fri, 19 Dec 2014 22:22:33

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
132.206.205.6 On: Fri, 19 Dec 2014 22:22:33

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
132.206.205.6 On: Fri, 19 Dec 2014 22:22:33

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
132.206.205.6 On: Fri, 19 Dec 2014 22:22:33

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
132.206.205.6 On: Fri, 19 Dec 2014 22:22:33

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
132.206.205.6 On: Fri, 19 Dec 2014 22:22:33

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
132.206.205.6 On: Fri, 19 Dec 2014 22:22:33

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
132.206.205.6 On: Fri, 19 Dec 2014 22:22:33

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
132.206.205.6 On: Fri, 19 Dec 2014 22:22:33