Relative efficiency calibration for determining isotopic composition and age of HEU items by passive non-destructive gamma spectrometry

被引：4
作者：
Le, T. A. [1 ,2 ,3 ]
Nguyen, C. T. [1 ]
Bui, V. L. [2 ]
Lakosi, L. [1 ]
机构：
[1] Hungarian Acad Sci, Energy Res Ctr, POB 49, H-1525 Budapest, Hungary
[2] Vietnam Natl Univ, Coll Sci, Hanoi 334, Vietnam
[3] Vietnam Acad Sci & Technol, Inst Phys, Ctr Nucl Phys, Hanoi, Vietnam
来源：
APPLIED RADIATION AND ISOTOPES | 2018年 / 142卷
关键词：
U-232; HEU; Isotopic composition; Age-dating; Intrinsic calibration; Weapon grade enrichment; Shielded uranium material; Low background gamma-spectrometry; URANIUM;
D O I：
10.1016/j.apradiso.2018.09.023
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The observation of the 239 keV gamma line from U-232 decay in high-enriched uranium (HEU) samples prompted us to utilize U-232 (with main gamma energies of its daughters at 239, 583, 763, and 860 keV) as a mediator isotope for performing relative (intrinsic) efficiency calibration among U-232, U-234, U-235, U-238, and Bi-214 isotopes. By this way, the isotopic composition and age of HEU samples can be derived from activity ratios constituted between pairs of these isotopes on the basis of a common relative efficiency calibration curve. The method proved to be a useful tool for gamma-spectrometric characterization of HEU items, especially of weapon grade, shielded uranium material.
引用
收藏
页码：220 / 226
页数：7
相关论文
共 13 条
12