PROMPT GAMMA-RAY ANALYSIS OF BORON WITH COLD AND THERMAL-NEUTRON GUIDED BEAMS
PROMPT GAMMA-RAY ANALYSIS OF BORON WITH COLD AND THERMAL-NEUTRON GUIDED BEAMS
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DOI：
10.1021/ac00120a006
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发表时间：
1995-12-15
影响因子：
7.4
通讯作者：
WOOD, AKH
中科院分区：
文献类型：
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作者：
YONEZAWA, C;WOOD, AKH
使用中子诱导瞬发伽马射线分析对各种材料中的痕量硼进行无损测定。用 JRR-3M 的冷或热引导中子照射 100-250 mg 样品，测量多普勒展宽的 478 keV 瞬发伽马射线。为了准确测定 B 含量，检查了分析条件，例如样品大小、样品的氢含量以及其他元素造成的干扰。在岩石、植物样品、煤和煤飞灰、各类沉积物、动物组织、环境样品和反应堆材料等参考材料中测定了纳克至微克/克的硼含量，准确度和精密度优于 20%。检测限因样品类型而异：石墨和铍为 12-22 ng/g；海洋环保材料、粉煤灰、胡椒灌木120-260 ng/g；其他材料为 57-98 ng/g。
Nondestructive determination of trace amounts of boron in various materials was carried out using neutron induced prompt gamma-ray analysis. A 100-250 mg sample was irradiated with cold or thermal guided neutrons of JRR-3M, and the Doppler-broadened 478 keV prompt gamma-rays were measured. To determine the B content accurately, analytical conditions such as the sample size, the hydrogen content of the sample, and any interferences due to other elements were examined. Nanogram to microgram per gram levels of B were determined in reference materials, including rocks, botanical samples, coal and coal fly ash, various types of sediments, animal tissue, environmental samples, and reactor materials, with accuracy and precision of better than 20%. The detection limits varied depending on the type of sample: 12-22 ng/g for graphite and Be; 120-260 ng/g for marine environmental materials, coal fly ash, and pepperbush; and 57-98 ng/g for the other materials.