The influence of energy density inside the nuclear track on the secondary-ion emission

被引：6
作者：
Neugebauer, R
Jalowy, T
Pereira, JAM
da Silveira, EF
Rothard, H
Toulemonde, M
Groeneveld, KO
机构：
[1] Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany
[2] Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany
[3] UFRJ, Inst Phys, LaCAM, BR-21945970 Rio De Janeiro, RJ, Brazil
[4] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22952970 Rio De Janeiro, Brazil
[5] CEA, CNRS, UMR 6637,ISMRA, Ctr Interdisciplinaire Rech Ions Lasers CIRIL, F-14070 Caen 05, France
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2003年 / 209卷
关键词：
ion-solid interaction; secondary ion mass spectrometry; time of flight technique; secondary ion desorption;
D O I：
10.1016/S0168-583X(02)01970-5
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Secondary ion emission yields from polycrystalline LiF and deuterated amorphous carbon a-C:D, bombarded by isotachic projectiles at 1.4 MeV/u, were studied as a function of the projectile atomic number (C, N, Ar, Kr, Sn) and consequently, as a function of the electronic stopping power. The emitted, positively charged secondary ions were analysed by a time of flight mass spectrometer. The H+ ions originate on the top surface near the track core, while heavier secondary ions (e.g. hydrocarbons) originate from the region of the track halo. Emission of Li+ from LiF was observed for all projectiles. On the other hand, only Sn projectiles were able to produce D+ emission from a-C:D. The results are discussed considering the deposited energy density. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：62 / 67
页数：6
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