DIRECT OBSERVATION OF CLO FROM CHLORINE NITRATE PHOTOLYSIS

被引：41

作者：

MINTON, TK ^{[1
]}

NELSON, CM ^{[1
]}

MOORE, TA ^{[1
]}

OKUMURA, M ^{[1
]}

机构：

[1] CALTECH,ARTHUR AMOS NOYES LAB CHEM PHYS,PASADENA,CA 91125

来源：

SCIENCE | 1992年 / 258卷 / 5086期

关键词：

D O I：

10.1126/science.258.5086.1342

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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 --> ClO + NO2 and ClONO2 --> 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.

引用

页码：1342 / 1345

页数：4

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