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

页码：220 / 226

页数：7

共 13 条

[1]

Dudder G. B, 2003, P INT C ADV DESTR NO

[2]

DUDDER GB, 2002, 7 M INT TECHN WORK G

[3]

Gunnink R., 1994, UCRLJC114713

[4]

Hanlen R, 2011, ROUND ROB 3 DAT REV

[5]

Lemley J. R., 1999, BNL66293

[6] Gamma-spectrometric uranium age-dating using intrinsic efficiency calibration [J].

Nguyen, CT ;

Zsigrai, J .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2006, 243 (01) :187-192

[7] Age-dating of highly enriched Uranium by γ-spectrometry [J].

Nguyen, CT .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2005, 229 (01) :103-110

[8]

Nucleonica Web Portal, 2010, NUCLEONICA

[9]

Peurrung A.J., 1998, PNNL12075

[10]

Tryshyn V. V., 2001, IAEASM3671405P

← 1 2 →