Kinetic study of the 308 and 345 nm emissions of the molecule XeCl

Autor:	J. Galy, A. Birot, P. Rives, H. Asselman, H. Brunet, J. L. Teyssier
Rok vydání:	1995
Předmět:	Coupling constant Reaction rate Reaction rate constant Xenon Band gap Chemistry General Physics and Astronomy chemistry.chemical_element Molecule Emission spectrum Physical and Theoretical Chemistry Atomic physics Kinetic energy
Zdroj:	The Journal of Chemical Physics. 102:1217-1224
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.468908
Popis:	The light pulses of two emissions of the molecule XeCl, centered at 308 and 345 nm, both have decay time constants that behave in a very similar way with respect to variations in the partial pressures of xenon and HCl; this is explained by collisional coupling between the states B and C of XeCl which are at the origin of the two emissions. The identification of the different collision processes and the determination of the reaction rate constants particularly underline the occurrence of a three‐body collision process between XeCl (B,C), Xe, and HCl; the rate constant is kM=(5.85±2.70)×10−5 Torr−2 ns−1. Measurements were also made of the coupling constants B→C and C→B which were found to be kBC=(2.56±1.05)×10−4 Torr−1 ns−1 and kCB=(1.45±1.05)×10−4 Torr−1 ns−1. The deduced energy gap between the two states (EB−EC=119 cm−1) is in very good agreement with the values in the literature.
Databáze:	OpenAIRE
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