Direct observation of ClO from chlorine nitrate photolysis

Chlorine nitrate photolysis has been investigated with the use of a molecular beam technique. Excitation at both 248 and 193 nanometers led to photodissociation by two pathways, ClONO2 yields ClO + NO2 and ClONO2 yields Cl + NO3, with comparable yields. This experiment provides a direct measurement...

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Bibliographic Details
Published in:	Science (American Association for the Advancement of Science) Vol. 258; no. 5086; pp. 1342 - 1345
Main Authors:	Minton, Timothy K., Nelson, Christine M., Moore, Teresa A., Okumura, Mitchio
Format:	Journal Article
Language:	English
Published:	Legacy CDMS American Association for the Advancement of Science 20-11-1992
Subjects:	Chlorine oxides Inorganic And Physical Chemistry Molecular beams
Online Access:	Get full text
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Summary:	Chlorine nitrate photolysis has been investigated with the use of a molecular beam technique. Excitation at both 248 and 193 nanometers led to photodissociation by two pathways, ClONO2 yields ClO + NO2 and ClONO2 yields Cl + NO3, with comparable yields. This experiment provides a direct measurement of the ClO product channel and consequently raises the possibility of an analogous channel in ClO dimer photolysis. Photodissociation of the ClO dimer is a critical step in the catalytic cycle that is presumed to dominate polar stratospheric ozone destruction. A substantial yield of ClO would reduce the efficiency of this cycle.
Bibliography:	CDMS Legacy CDMS ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0036-8075 1095-9203
DOI:	10.1126/science.258.5086.1342