COHERENT LASER CONTROL OF THE PRODUCT DISTRIBUTION OBTAINED IN THE PHOTOEXCITATION OF HI

被引：282

作者：

ZHU, LC ^{[1
]}

KLEIMAN, V ^{[1
]}

LI, XN ^{[1
]}

LU, SP ^{[1
]}

TRENTELMAN, K ^{[1
]}

GORDON, RJ ^{[1
]}

机构：

[1] UNIV ILLINOIS, DEPT CHEM, CHICAGO, IL 60607 USA

来源：

SCIENCE | 1995年 / 270卷 / 5233期

关键词：

D O I：

10.1126/science.270.5233.77

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：

Active control of the distribution of products of a chemical reaction was demonstrated by using a method based on the principle of quantum mechanical interference. Hydrogen iodide (HI) molecules were simultaneously excited above their ionization threshold by two competing pathways. These paths were absorption of three ultraviolet photons of frequency omega(1) and one vacuum ultraviolet photon of frequency omega 3 = 3 omega(1). The HI+ and I+ signals were modulated as the phase between the lasers was varied, with the HI+ signal lagging by 150 degrees +/- 15 degrees. A mechanism consisting of autoionization acid predissociation is proposed.

引用

页码：77 / 80

页数：4

共 32 条

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