Femtosecond photodissociation dynamics of I2 studied by ion imaging

被引：30

作者：

Larsen, JJ ^{[1
]}

Morkbak, NJ

Olesen, J

Bjerre, N

Machholm, M

Keiding, SR

Stapelfeldt, H

机构：

[1] Aarhus Univ, Inst Phys & Astron, DK-8000 Aarhus C, Denmark

[2] Aarhus Univ, Dept Chem, DK-8000 Aarhus C, Denmark

来源：

JOURNAL OF CHEMICAL PHYSICS | 1998年 / 109卷 / 20期

关键词：

D O I：

10.1063/1.477557

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ion imaging is employed to analyze the fragments from timed Coulomb explosion studies of femtosecond (fs) molecular dynamics. The technique provides high detection efficiency and direct recording of the two-dimensional velocity of all ionized fragments. We illustrate the approach by studying photodissociation of iodine initiated by a weak femtosecond pump pulse and probed by an intense, delayed femtosecond pulse. The ion images, recorded as a function of the pump-probe delay, reveal the evolution of the internuclear separation of the dissociating I-2 molecule. The experimental results are in good agreement with quantum mechanical wave packet simulations. We discuss the perspectives for extending the studies to photochemical reactions of small polyatomic molecules. (C) 1998 American Institute of Physics. [S0021-9606(98)01544-X].

引用

页码：8857 / 8863

页数：7

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