Effect of interaction of atomic electrons on ionization of an insulator in swift heavy ion tracks

被引：11

作者：

Baranov, A. A. ^{[2
]}

Medvedev, N. A. ^{[3
]}

Volkov, A. E. ^{[1
]}

Scheblanov, N. S. ^{[4
]}

机构：

[1] Kurchatov Inst, Natl Res Ctr, Moscow 123182, Russia

[2] Univ Savoie 9, LAPTH, F-74941 Annecy Le Vieux, France

[3] DESY, CFEL, D-22607 Hamburg, Germany

[4] Univ Lyon, CNRS, UMR 5516, Lab Hubert Curien, F-42000 St Etienne, France

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2012年 / 286卷

关键词：

Multiionization; Swift heavy ion; Track; Electronic excitations; Monte-Carlo; binary collisions approximation; statistical energy deposition; MULTIPLE IONIZATION; CONVOLUTION APPROXIMATION; COLLISIONS; WATER; SIMULATION; MOLECULES; TARGETS; MATTER; RANGE;

D O I：

10.1016/j.nimb.2012.01.011

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Effects of applications of two different models of atomic ionizations in MC simulations describing excitation of the electronic subsystem of an insulator in tracks of swift heavy ions decelerated in the electronic stopping regime are investigated. The first mechanism is based on binary collisions of a fast projectile with atomic electrons considered as independent. The second one assumes redistribution of the energy transferred to an atom from an ion between the atomic electrons before autoionization of the excited atom. It is demonstrated that an appreciable difference occurs only in the kinetics of the most energetic electrons appeared during the ionization. This difference affects only a small fraction of the excess electronic energy in the far periphery of a track. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：51 / 55

页数：5

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