Absolute separation energies for Na clusters

被引：21

作者：

Borggreen, J

Hansen, K

Chandezon, F

Dossing, T

Elhajal, M

Echt, O

机构：

[1] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark

[2] Aarhus Univ, Inst Phys & Astron, DK-8000 Aarhus C, Denmark

[3] CEA Grenoble, SI2A, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, France

[4] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA

[5] CNRS, Lab Louis Neel, F-38042 Grenoble 9, France

来源：

PHYSICAL REVIEW A | 2000年 / 62卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.62.013202

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Na clusters in the size range of 50-400 atoms are led to evaporate in a heat bath with controlled temperature. For cluster sizes around closed shells, decay rates are determined as a function of temperature. For temperatures below 357 K they all agree with an Arrhenius law and allow absolute separation energies to be extracted. Separation energies are presented and compared to previously determined (relative) values. Enhanced shell effects are observed in the heat bath experiments. Deviations from the Arrhenius law at intermediate temperatures are discussed.

引用

页数：7

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