EVIDENCE FOR RESONANCE-ENHANCED MULTIPHOTON IONIZATION OF LIQUID WATER USING 2-EV LASER-LIGHT - VARIATION OF HYDRATED ELECTRON ABSORBENCY WITH FEMTOSECOND PULSE INTENSITY

被引：21

作者：

PEPIN, C

HOUDE, D

REMITA, H

GOULET, T

JAYGERIN, JP

机构：

[1] Département de Médecine Nucléaire et de Radiobiologie, Faculté de Médecine, Université de Sherbrooke, Sherbrooke

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.69.3389

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The multiphoton ionization of liquid water that occurs in femtosecond laser photolysis is investigated with an experimental setup in which 2-eV photons are sent into the sample. Hydrated electrons are identified as the generated absorbing species and their absorbance A is measured as a function of the laser irradiance E. The power law A is-proportional-to E1.8 which is found differs markedly from that expected from energetic considerations. This is explained in terms of a resonant four-photon absorption involving the A1B1 electronic state of water which, in the liquid phase, is partly autoionizing.

引用

页码：3389 / 3392

页数：4

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