Time- and energy-resolved luminescence of the KrAr exciplex: from the dilute to the condensed phase

Laporte, P.; Subtil, J. L.; Reininger, R.; Gürtler, P.

doi:10.1016/0009-2614(90)85326-8

Cited by 11 publications

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“…The decay lifetime of the combined state to the ground state is 230 ns. 7 As in the case of the excimers 9,23-25 and XeKr* exciplexes, 5 the emission from the 0 ϩ ( 3 P 1 ) and ͓1,0 Ϫ ͔( 3 P 2 ) states to the ground state almost coincide in energy. 7 Evidently, only time resolved techniques combined with selective excitation ͑as described below͒ allow to separate the two emissions.…”

Section: Introductionmentioning

confidence: 79%

“…7 As in the case of the excimers 9,23-25 and XeKr* exciplexes, 5 the emission from the 0 ϩ ( 3 P 1 ) and ͓1,0 Ϫ ͔( 3 P 2 ) states to the ground state almost coincide in energy. 7 Evidently, only time resolved techniques combined with selective excitation ͑as described below͒ allow to separate the two emissions. In what follows, the decay of the 0 ϩ ( 3 P 1 ) and ͓1,0 Ϫ ͔( 3 P 2 ) states to the ground will be referred as the fast and slow components, respectively.…”

Section: Introductionmentioning

confidence: 79%

“…In order to avoid excimer formation, the Kr concentration in the samples was in the ppm range. 7 Under these conditions, the absorption coefficient at the perturbed Kr 3 P 1 resonance line is of the order of 1 cm Ϫ1 . The focused synchrotron radiation beam draws a thin excitation volume in the cell with a submillimeter cross section which serves as the entrance slit for the secondary monochromator.…”

Section: Experimental System and Methodsmentioning

confidence: 97%

“…Under such conditions, spectra can be obtained with almost no contamination from the excimer. 5,7 In the experimental part of this study ͑Sec. III͒ we report on the temperature dependence of the emissions from the Kr*Ar exciplexes.…”

Section: Introductionmentioning

confidence: 99%

“…6 As for the lifetimes associated with these states, the higher lying 0 ϩ has a highly permitted decay to the 0 ϩ ground state with a lifetime in the range of a few ns. 4,7 The energy separation between the 1 and 0 Ϫ is such that they maybe considered as mixed. Therefore, they will be referred as the ͓1,0 Ϫ ͔( 3 P 2 ) state.…”

Section: Introductionmentioning

confidence: 99%

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Exciplex vacuum ultraviolet emission spectra of KrAr: Temperature dependence and potentials

Subtil

Jonin

Laporte

et al. 1996

The Journal of Chemical Physics

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The temperature dependence of the emissions from the 0 ϩ ( 3 P 1 )and 1( 3 P 2 ) Kr*Ar exciplex states in the range 85-350 K was studied using time resolved techniques, vacuum ultraviolet synchrotron radiation, and argon samples doped with minimal amounts of krypton. As the temperature is increased, the emission shifts to the blue, its width increases by almost a factor of 2, and the line shape becomes asymmetrical. The experimental line shapes have been simulated by means of Franck-Condon density calculations using the available ground state potential of Aziz and Slaman ͓Mol. Phys. 58, 679 ͑1986͔͒ and by modeling the exciplex potentials as Morse curves. The potential parameters for the 0 ϩ and 1 states are r e ϭ 5.05 Ϯ 0.01 and 5.07Ϯ0.01 a 0 , respectively; D e ϭ 1150 Ϯ 200 cm Ϫ1 and ␤ϭ1.4Ϯ0.1 a 0Ϫ1 for both states. The latter two values yield e ϭ 140 cm Ϫ1 and e x e ϭ 4.3 cm Ϫ1 . The energy positions of the exciplexes's wells and their depths are compared with published results.

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Section: Introductionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 79%

Section: Experimental System and Methodsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations