Mean excitation energies extracted from stopping power measurements of protons in polymers by using the modified Bethe-Bloch formula

被引：3
作者：
Ammi, H
Zemih, R
Mammeri, S
Allab, M
机构：
[1] Ctr Rech Nucl Alger, Algiers, Algeria
[2] USTHB, Fac Phys, Algiers, Algeria
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2005年 / 230卷
关键词：
stopping power; mean excitation energy; modified Bethe-Bloch theory;
D O I：
10.1016/j.nimb.2004.12.019
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Recent stopping power measurements in thin polymeric films have been performed for protons of 0.4-3.5 MeV energies using the indirect transmission technique [H. Ammi, S. Mammeri, M. Chekirine, B. Bouzid, M. Allab, Nucl. Instr. and Meth. B 198 (2002) 5]. Experimental stopping data have been analyzed with the modified Bethe-Bloch formula and the mean excitation energies I have been then extracted from the data. Resulting values for each thin film are 76 +/- 1eV in Mylar, 70.8 +/- 1 eV in Makrofol, 82.2 +/- 1.2 eV in LR-1 15 and 55.4 +/- 1 eV in Polypropylene. The I-extracted values are compared to those I-B calculated by using the Bragg's rule. (c) 2004 Elsevier B.V. All rights reserved.
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页码：68 / 72
页数：5
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