Journal Article10.1016/S0301-0104(99)00003-8
The `approach-induced' transition
M.E. Akopyan,N.K. Bibinov,Daria B. Kokh,Anatoly Pravilov,M.B. Stepanov,Oleg S. Vasyutinskii +5 more
- 01 Apr 1999
- Vol. 242, Iss: 2, pp 263-272
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TL;DR: In this paper, the dependences of the I 2 (E, v E ↔ I 2( X ) D, v D ) collision-induced transition rate constant on the vibrational vE, vD, rotational JD numbers, energy gaps, and Franck-Condon factors of the combined levels have been studied.
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Abstract: The dependences of the I 2 ( E , v E ↔ I 2 ( X ) D , v D ) collision-induced transition rate constant on the vibrational vE, vD, rotational JD numbers, energy gaps, and Franck–Condon factors (FCF) of the combined levels have been studied. Selected rovibrational levels of the E state have been produced by optical–optical double resonance (OODR) excitation via the B0u+ state. Rovibronic levels of the D state populated in collision-induced intramolecular transitions (CIIT) in the nearly single-collision conditions have been identified. Rate constants of CIIT derived from the E→B and D→X emission spectra simulation have been determined. It has been shown that the u↔g, ΔΩ=0 and ΔJ≤3 propensity rules are valid in the I2(E)+I2(X) → I2(ion-pair states)+I2(X) process. Its cross-sections are giant ((1.1–3.3)×103 A2), and there is distinct correlation between them and energy gaps ΔE=f(Δv, ΔJ) of the combined rovibronic levels. The transitions between isoenergetic rovibronic levels are the most probable. There is no correlation between the cross-sections of transitions and FCF of the levels. An applicability of some models of CIIT to the processes under study has been discussed. It has been shown that they cannot explain the observed experimental data. It would be better to call the processes similar to the observed one as `approach-induced' to emphasize their extremely long-range character.
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Citations
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Collision-induced non-adiabatic transitions between the ion-pair states of molecular iodine: A challenge for experiment and theory
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TL;DR: In this paper, the authors investigated the collision-induced electronic energy transfer that occurs when I2 in the E(0g+) ion-pair electronic state collides with ground electronic state I2.
The “approach-induced” and collision-induced transitions from low, vE=8–23, vibronic levels of the I2(E) state
TL;DR: The dependences of the I 2 (E0 g +,v E,J E → I 2( X ) D0 u +, v D,J D ) transition rate constants on the vibrational v E, vD, rotational J E, J D quantum numbers, energy gaps, and Franck-Condon factors of the combined levels have been studied in the range v E =8-23 as discussed by the authors.
28
The approach-induced I2() transitions, M=He, Ar, I2, N2, CF4
TL;DR: In this article, the authors studied the dependence of rate constant of the intramolecular I 2 (E0 g + → M D0 u + ) approach-induced transition, M=He, Ar, I 2, N 2, CF 4, on the vibrational v E, v D, rotational J E, J D numbers, energy gaps, and Franck-Condon factors of the combined levels of the OODR method.
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