On the molecular effect in hydrogen molecular ions penetration through thin films

被引：3
|
作者：
Marenkov, E. [1 ]
Kurnaev, V. [1 ]
Lasa, A. [2 ]
Nordlund, K. [2 ]
机构：
[1] Natl Res Nucl Univ MEPhI, Moscow 115409, Russia
[2] Univ Helsinki, Dept Phys, Assoc Euratom TEKES, FI-00014 Helsinki, Finland
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2012年 / 287卷
关键词：
Molecular ions; Carbon films; Stopping power; Electronic straggling; COLLISION CASCADES; DAMAGE; BOMBARDMENT; DENSITY;
D O I：
10.1016/j.nimb.2012.07.003
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Penetration of low energy (2-12 key) hydrogen molecular ions (H-2(+)) and single protons through thin (40 angstrom) carbon films is simulated using molecular dynamic approach. It is shown that the width of energy loss spectra for the case of H-2(+) penetration is larger than that for H+ spectra (a "molecular effect") as it was previously observed in experiments [1]. This is explained by the molecular ions dissociation in the first few monolayers of the target. A simple semi-analytical model accounting for the molecular effect is provided. Results of simulations are compared with experiments. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：46 / 50
页数：5
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