Development of Particle Induced Gamma-Ray Emission Methods for Nondestructive Determination of Isotopic Composition of Boron and Its Total Concentration in Natural and Enriched Samples
Development of Particle Induced Gamma-Ray Emission Methods for Nondestructive Determination of Isotopic Composition of Boron and Its Total Concentration in Natural and Enriched Samples
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DOI：
10.1021/ac5024292
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发表时间：
2014-11-18
影响因子：
7.4
通讯作者：
Pujari, Pradeep K.
中科院分区：
文献类型：
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作者：
Chhillar, Sumit;Acharya, Raghunath;Pujari, Pradeep K.
我们报告简单的粒子诱导γ射线发射（PIGE）的方法，使用4 MeV的质子束，用于同时和无损测定的同位素组成的硼（B-10/B-11原子比）和总硼浓度在各种固体样品中的天然同位素组成和富集与B-10。它涉及到分别从B-10（p，alpha gamma）Be-7、B-10（p，p 'gamma）B-10和（11）（p，p' gamma）B-11反应中测量429、718和2125 keV的瞬发γ射线。通过比较样品中B-10和B-11对应的峰面积与天然硼酸标准的比值，确定了天然和富集样品中硼的同位素组成。原位电流归一化PIGE方法，使用F或Al，被标准化用于总B浓度测定。通过分析化学计量的硼化合物和样品，如碳化硼，硼酸，碳硼烷，硼硅酸盐玻璃的方法进行了验证。硼的同位素组成在0.247-2.0范围内，对应于B-10在19.8-67.0原子%范围内，总B浓度在5-78重量%范围内。它已被证明，PIGE提供了一个简单的和替代的方法，总硼以及同位素组成的测定硼基固体样品，包括中子吸收剂，是重要的核技术。
We report simple particle induced gamma-ray emission (PIGE) methods using a 4 MeV proton beam for simultaneous and nondestructive determination of the isotopic composition of boron (B-10/B-11 atom ratio) and total boron concentrations in various solid samples with natural isotopic composition and enriched with B-10. It involves measurement of prompt gamma-rays at 429, 718, and 2125 keV from B-10(p,alpha gamma)Be-7, B-10(p, p'gamma)B-10, and (11)(p, p'gamma)B-11 reactions, respectively. The isotopic composition of boron in natural and enriched samples was determined by comparing peak area ratios corresponding to B-10 and B-11 of samples to natural boric acid standard. An in situ current normalized PIGE method, using F or Al, was standardized for total B concentration determination. The methods were validated by analyzing stoichiometric boron compounds and applied to samples such as boron carbide, boric acid, carborane, and borosilicate glass. Isotopic compositions of boron in the range of 0.247-2.0 corresponding to B-10 in the range of 19.8-67.0 atom % and total B concentrations in the range of 5-78 wt % were determined. It has been demonstrated that PIGE offers a simple and alternate method for total boron as well as isotopic composition determination in boron based solid samples, including neutron absorbers that are important in nuclear technology.