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Titolo:
EXPERIMENTAL AND THEORETICAL KINETICS FOR THE REACTION OF AL WITH O-2AT TEMPERATURES BETWEEN 23 AND 295 K
Autore:
LEPICARD SD; CANOSA A; TRAVERS D; CHASTAING D; ROWE BR; STOECKLIN T;
Indirizzi:
UNIV RENNES 1,UMR 6627 CNRS,CAMPUS BEAULIEU F-35042 RENNES FRANCE UNIV RENNES 1,UMR 6627 CNRS F-35042 RENNES FRANCE LAB PHYSICOCHIM THEOR F-33400 TALENCE FRANCE
Titolo Testata:
The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory
fascicolo: 51, volume: 101, anno: 1997,
pagine: 9988 - 9992
SICI:
1089-5639(1997)101:51<9988:EATKFT>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEUTRAL-NEUTRAL REACTIONS; RATE CONSTANTS; CHEMICAL-REACTIONS; ZETA-OPHIUCHI; RHO-OPHIUCHI; CHEMISTRY; MOLECULES; FLUORESCENCE; ABUNDANCES; ELEMENTS;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
54
Recensione:
Indirizzi per estratti:
Citazione:
S.D. Lepicard et al., "EXPERIMENTAL AND THEORETICAL KINETICS FOR THE REACTION OF AL WITH O-2AT TEMPERATURES BETWEEN 23 AND 295 K", The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory, 101(51), 1997, pp. 9988-9992

Abstract

The first study of the kinetics of Al atoms with O-2 at low and ultralow temperatures is reported. Rate constants have been measured from 295 to 23 K using the pulsed laser photolysis-laser-induced fluorescence (PLP-LIF) technique in a CRESU (Cinetique de Reaction en Ecoulement Supersonique Uniforme) apparatus. Rate constants were found to increase monotonically with decreasing temperature: k(T) = (1.75 +/- 0.10) x 10(-10)(T/298)(-0.25+/-0.02) exp[(7.3 +/- 3.0)/T] cm(3) s(-1). The rate constant for the reaction Al with O-2 has also been calculated as a function of temperature using a theoretical approach based on the adiabatic capture centrifugal sudden approximation (ACCSA) method, These calculations were found to be in good agreement with experimental results and were able to explain the observed temperature dependence by theopen-shell nature of the reactants, Possible astrophysical implications are also discussed concerning the chemistry of aluminum atoms in the interstellar medium.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/11/20 alle ore 21:44:07