Modelling the mobility of positive ion clusters in normal liquid helium over large pressure ranges

被引：14

作者：

Aitken, Frederic ^{[1
]}

Bonifaci, Nelly ^{[1
]}

Mendoza-Luna, Luis Guillermo ^{[2
]}

von Haefte, Klaus ^{[2
]}

机构：

[1] CNRS, G2ELab, F-38042 Grenoble 9, France

[2] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2015年 / 17卷 / 28期

基金：

芬兰科学院;

关键词：

IMPURITY IONS; TRANSPORT; CHARGE; COMPRESSIBILITY; IONIZATION; VISCOSITY; CHEMISTRY; HE-4; HE4I;

D O I：

10.1039/c5cp02539g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Positively charged helium clusters, also called 'snowballs', have been investigated within normal liquid helium. Thermodynamic state equations for ionic helium clusters in liquid helium have been developed, allowing us to discern the 'hydrodynamic' radius for a wide range of hydrostatic pressures and temperatures. The mobilities derived from the cluster sizes using stokes law match experimental data with unsurpassed accuracy. For low pressures the compressibility of the cluster ions was found to be distinctly larger than the compressibility of solid helium suggesting that in this pressure range clusters are fully or partially liquid.

引用

页码：18535 / 18540

页数：6

共 53 条

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