Measurement of the deactivation of Br* by atomic iodine

Autor:	Gordon D. Hager, Harold C. Miller, J. K. McIver, Robert L. Pastel
Rok vydání:	1994
Předmět:	Quenching (fluorescence) Bromine Chemistry Photodissociation Relaxation (NMR) Analytical chemistry General Physics and Astronomy chemistry.chemical_element Reaction rate constant Excited state Atom Physical and Theoretical Chemistry Atomic physics Ground state
Zdroj:	The Journal of Chemical Physics. 100:3624-3630
ISSN:	1089-7690 0021-9606
Popis:	Laser photodissociation of IBr is used to observe the deactivation of spin–orbit excited Br(4 2P1/2) (Br*) by ground state atomic I(5 2P3/2). The measured quenching rate constant is kI=1.9±0.2×10−11 cm3/s. A total Br* quenching rate due to both ground state Br(4 2P3/2) and self‐quenching by Br* is observed following photodissociation of Br2. The effective rate constant is more than 20 times smaller than kI. The results are compared with Landau, Zener, Stueckelberg (LZS) calculations and other experiments. The consequence of the fast I atom quenching on photodissociation‐pumped Br* lasers is discussed.
Databáze:	OpenAIRE
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