Bubble formation and decay in 3He and 4He clusters -: art. no. 233401

被引：47
|
作者：
von Haeften, K [1 ]
Laarmann, T [1 ]
Wabnitz, H [1 ]
Möller, T [1 ]
机构：
[1] DESY, Hamburger Synchrontronstschlungslab HASYLAB, D-22603 Hamburg, Germany
来源：
PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 23期
关键词：
D O I：
10.1103/PhysRevLett.88.233401
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The energy transfer in He-3 and He-4 clusters electronically excited by monochromatic synchrotron radiation is investigated by luminescence spectroscopy. Depending on the cluster size and the isotopic constitution, either sharp, broadened, or shifted emission bands of single He molecules are observed. The spectral features show that He molecules emit light either within a bubble inside the cluster or in the vacuum after desorption from the cluster. From the luminescence intensity, the cluster diameter, and the radiative lifetime, an average velocity of similar to7 m/s of bubbles in He-4 clusters could be deduced. In the nonsuperfluid He-3 clusters this velocity was observed to be significantly lower.
引用
收藏
页码：233401 / 233401
页数：4
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