Time-resolved photoelectron spectroscopy on small tungsten cluster anions

被引：2
|
作者：
Stanzel, J. [2 ]
Burmeister, F. [3 ]
Neeb, M. [1 ]
机构：
[1] Helmholtz Zentrum Berlin Mat & Energie, Elektronenspeicherring BESSY 2, D-12489 Berlin, Germany
[2] Inventux Technol AG, Berlin, Germany
[3] Uppsala Univ, Dept Engn Sci, Uppsala, Sweden
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2010年 / 100卷 / 01期
关键词：
HOT-ELECTRON DYNAMICS; ENERGY RELAXATION; EXCITED ELECTRONS; METAL-CLUSTERS; EXCITATION; CU-N(-); COPPER; HOLES;
D O I：
10.1007/s00339-010-5611-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have studied the dynamics of photoexcited tungsten cluster anions W-n(-) (n = 3,4, ..., 14) by means of time-resolved two-photon photodetachment spectroscopy. At an excitation energy of h nu (pump)=1.56 eV the photoinduced dynamics is mainly dominated by fast electronic relaxation processes. For the smallest clusters, i.c., W-3(-), W-4(-), and W-5(-), individual relaxation channels have been identified and resolved on a timescale well below 100 fs. The time constants for the decay of nascent and secondary electrons have been deduced from a Bloch model. Complete thermalization takes place for all clusters on a timescale of similar to 1 ps.
引用
收藏
页码：21 / 29
页数：9
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