ULTRAFAST FRAGMENTATION OF SMALL ALKALI ATOM-AMMONIA CLUSTERS

被引：22

作者：

SCHULZ, CP ^{[1
]}

HOHNDORF, J ^{[1
]}

BROCKHAUS, P ^{[1
]}

NOACK, F ^{[1
]}

HERTEL, IV ^{[1
]}

机构：

[1] FREE UNIV BERLIN,FACHBEREICH PHYS,D-14195 BERLIN,GERMANY

来源：

CHEMICAL PHYSICS LETTERS | 1995年 / 239卷 / 1-3期

关键词：

D O I：

10.1016/0009-2614(95)00426-5

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：

Ultrafast dynamics of small, free alkali atom-ammonia clusters Na(NH3)(n) studied using amplified 150 fs Ti:sapphire laser radiation (red: 770-820 nm). Pump-probe experiments using the red photon to excite and the second harmonics (blue: 385-410 nm) to ionize the clusters show that the first electronically excited state of NaNH3(($) over bar A(2)E) is Stable for times tau > 1 ns. Larger cluster ions can only be observed for short delay times, indicating life times of the excited states of typically tau similar to 30 Ps for Na(NH3)(2). In addition, a significant Na+ ion signal rises on the same time scale, indicating fragmentation of the clusters and demonstrating a genuine 'pump-control' experiment.

引用

页码：18 / 24

页数：7

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