Observation of electron gas cooling in free sodium clusters.
Observation of electron gas cooling in free sodium clusters.
复制标题
游离钠簇中电子气冷却的观察。
DOI：
10.1103/physrevlett.96.117405
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发表时间：
2006
影响因子：
8.6
通讯作者：
B. von Issendorff
中科院分区：
文献类型：
--
作者：
M. Maier;G. Wrigge;M. A. Hoffmann;P. Didier;B. von Issendorff
利用飞秒抽运-探测光电子谱和光碎裂谱研究了自由尺寸选择的Na+（n）（n = 16-250）团簇。从热电子气体的热电子发射被用来监测从电子系统的晶格振动的能量转移。在不同尺寸下测得的电子-声子耦合常数可用半径相关函数g（R）=（2.3 + 114 A ~ 2/R ~ 2）× 10 ~（16）W/m ~ 3 K来描述。即使对于最小的团簇尺寸，也没有观察到强的量子尺寸效应。
Free size-selected Na+(n) (n = 16-250) clusters have been studied by femtosecond pump-probe photoelectron and photofragmentation spectroscopy. Thermal electron emission from the hot electron gas was used to monitor the energy transfer from the electronic system to lattice vibrations. The electron-phonon coupling constants determined for the different sizes can be described by the radius dependent function g(R) = (2.3 + 114 A2/R2) X 10(16) W/m3K. No strong quantum size effect was observed even for the smallest cluster size.