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Quenching ofO( 1 D 2)by Cl2CO: kinetics andO( 3 P J )yield

Authors
Journal
Chemical Physics Letters
0009-2614
Publisher
Elsevier
Publication Date
Volume
330
Identifiers
DOI: 10.1016/s0009-2614(00)01105-2
Disciplines
  • Chemistry

Abstract

Abstract Absolute rate coefficients ( k 1) for the deactivation of electronically excited oxygen atoms, O( 1 D 2) , by phosgene (Cl 2CO) have been measured as a function of temperature over the range 194– 425 K. The results are well described by the Arrhenius expression k 1(T)=2.04×10 −10 exp(+27/T) cm 3 molecule −1 s −1 . The reported values for k 1( T) are considerably lower than the values currently recommended for use in modeling stratospheric chemistry. The yield of ground state oxygen atoms, O( 3 P J ) , is found to be 0.20±0.04.

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