Kinetics of propagation of the lattice excitation in a swift heavy ion track

被引：16

作者：

Lipp, V. P. ^{[1
,2
]}

Volkov, A. E. ^{[3
]}

Sorokin, M. V. ^{[3
]}

Rethfeld, B. ^{[1
,2
]}

机构：

[1] Tech Univ Kaiserslautern, D-67663 Kaiserslautern, Germany

[2] OPTIMAS Res Ctr, D-67663 Kaiserslautern, Germany

[3] RRC Kurchatov Inst, Moscow 123182, Russia

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2011年 / 269卷 / 09期

基金：

俄罗斯基础研究基金会;

关键词：

Swift heavy ions; Swift heavy ion tracks; Molecular dynamics; Thermal spike model; Thermalization; Heat diffusion; LASER-PULSES; METALS; IRRADIATION; SLAB;

D O I：

10.1016/j.nimb.2010.11.070

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In this research we verify the applicability of the temperature and heat diffusion conceptions for the description of subpicosecond lattice excitations in nanometric tracks of swift heavy ions (SHI) decelerated in solids in the electronic stopping regime. The method is based on the molecular dynamics (MD) analysis of temporal evolutions of the local kinetic and configurational temperatures of a lattice. We used solid argon as the model system. MD simulations demonstrated that in a SHI track (a) thermalization of lattice excitations takes time of several picoseconds, and (b) application of the parabolic heat diffusion equations for the description of spatial and temporal propagation of lattice excitations is questionable at least up to 10 ps after the ion passage. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：865 / 868

页数：4

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