Absolute hydrogen depth profiling using the resonant 1H(15N,αγ)12C nuclear reaction

被引：9

作者：

Reinhardt, Tobias P. ^{[1
]}

Akhmadaliev, Shavkat ^{[2
]}

Bemmerer, Daniel ^{[2
]}

Stoeckel, Klaus ^{[1
,2
]}

Wagner, Louis ^{[1
,2
]}

机构：

[1] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany

[2] HZDR, D-01328 Dresden, Germany

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2016年 / 381卷

关键词：

Hydrogen storage; Hydrogen depth profiling; Nuclear resonant reaction analysis; STOPPING POWERS; CROSS-SECTION; HEAVY-IONS; N-15; SYSTEM;

D O I：

10.1016/j.nimb.2016.05.009

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Resonant nuclear reactions are a powerful tool for the determination of the amount and profile of hydrogen in thin layers of material. Usually, this tool requires the use of a standard of well-known composition. The present work, by contrast, deals with standard-less hydrogen depth profiling. This approach requires precise nuclear data, e.g. on the widely used H-1(N-15,alpha gamma)C-12 reaction, resonant at 6.4 MeV N-15 beam energy. Here, the strongly anisotropic angular distribution of the emitted gamma-rays from thiS resonance has been re-measured, resolving a previous discrepancy. Coefficients of (0.38 +/- 0.04) and (0.80 +/- 0.04) have been deduced for the second and fourth order Legendre polynomials, respectively. In addition, the resonance strength has been re-evaluated to (25.0 +/- 1.5) eV, 10% higher than previously reported. A simple working formula for the hydrogen concentration is given for cases with known gamma-ray detection efficiency. Finally, the absolute approach is illustrated using two examples. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：58 / 66

页数：9

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