Experimental determination of the melting point and heat capacity for a free cluster of 139 sodium atoms

被引：348

作者：

Schmidt, M

Kusche, R

Kronmuller, W

vonIssendorff, B

Haberland, H

机构：

[1] Fakultät für Physik, Universität Freiburg, Freiburg, D-79104

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.79.99

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The heat capacity of a free cluster has been determined from the temperature dependence of its photofragmentation mass spectrum. The data for the spherical sodium cluster Na-N(+) with N = 139, show a maximum at 267 K, which is interpreted as the solid-to-liquid phase transition in this finite system. The melting point lies 104 K, or 28% lower than that of bulk sodium. The latent heat of fusion is reduced by 46%.

引用

页码：99 / 102

页数：4

共 27 条

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