The role of micro-NRA and micro-PIXE in carbon mapping of organic tissues

被引：2
|
作者：
Niekraszewicz, L. A. B. [1 ,2 ]
de Souza, C. T. [1 ]
Stori, E. M. [1 ]
Jobim, P. F. C. [1 ]
Amaral, L. [1 ,2 ]
Dias, J. F. [1 ,2 ]
机构：
[1] Univ Fed Rio Grande do Sul, Inst Phys, Ion Implantat Lab, BR-91501970 Porto Alegre, RS, Brazil
[2] Univ Fed Rio Grande do Sul, Grad Program Mat Sci, BR-91540000 Porto Alegre, RS, Brazil
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2015年 / 348卷
关键词：
Micro-PIXE; Micro-NRA; Light elements; SDD detector; CROSS-SECTIONS; ELASTIC-SCATTERING; NUCLEAR MICROPROBE; LIGHT-ELEMENTS; NITROGEN; SILICON; RANGE; IONS;
D O I：
10.1016/j.nimb.2015.01.023
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
This study repots the work developed in the Ion Implantation Laboratory (Porto Alegre, RS, Brazil) in order to implement the micro-NRA technique for the study of light elements in organic tissues. In particular, the work was focused on nuclear reactions employing protons and alphas with carbon. The (p,p) resonances at 0.475 and 1.734 were investigated. The (alpha,alpha) resonance at 4.265 MeV was studied as well. The results indicate that the yields for the 0.475 and 1.734 MeV resonances are similar. Elemental maps of different structures obtained with the micro-NRA technique using the 1.734 MeV resonance were compared with those obtained with micro-PIXE employing a SDD detector equipped with an ultra-thin window. The results show that the use of micro-NRA for carbon at 1.734 MeV resonance provides good results in some cases at the expense of longer beam times. On the other hand, micro-PIXE provides enhanced yields but is limited to surface analysis since soft X-rays are greatly attenuated by matter. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：160 / 164
页数：5
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