TRUE-COINCIDENCE CORRECTION FOR FIELD GAMMA-RAY SPECTROMETRY IN AUGER HOLE COUNTING GEOMETRY

被引：4

作者：

DECORTE, F ^{[1
]}

DEWISPELAERE, A ^{[1
]}

VANCRAEYNEST, L ^{[1
]}

DENEVE, P ^{[1
]}

VANDENHAUTE, P ^{[1
]}

机构：

[1] STATE UNIV GHENT,INST GEOL,MINERAL PETROG & MICROPEDOL LAB,B-9000 GHENT,BELGIUM

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1994年 / 353卷 / 1-3期

关键词：

D O I：

10.1016/0168-9002(94)91717-5

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

When absolute calibration of gamma-ray spectrometry in auger hole counting geometry is aimed at, true-coincidence effects of the measured gamma-rays should be corrected for. The calculational method developed in the present work starts from modelling the auger hole counting geometry as an ''infinite'' Marinelli beaker, the finite dimensions of which are found by determining where ($) over bar Omega V versus H reaches a plateau (($) over bar Omega is the effective solid angle; V is the volume of the Marinelli beaker; H is the thickness of the cylindric mantle of the Marinelli beaker). Then, for the thus defined Marinelli beaker a coincidence correction factor (COI) is calculated - via a numerical integration procedure - as the weighted mean of COIs for infinitesimally thin source layers parallel to the detector surface, with the peak efficiency as the weighing factor. The effect on COI caused by the special geometric position of the material extending below the back of the detector was taken into account. The method turned out to yield quite acceptably accurate results, as checked for the 1368.6 and 2754.0 keV lines of Na-24 measured as an aqueous solution in a 23-1 Marinelli beaker on a 3 in. X 3 in. NaI(Tl) detector.

引用

页码：539 / 541

页数：3

共 6 条

[1]

BELLEMANS F, 1992, P INT K0 USERS WORKS, P69

[2]

Debertin K., 1988, GAMMA XRAY SPECTROME

[3] THE CORRECTION FOR GAMMA-GAMMA,GAMMA-KX AND GAMMA-LX TRUE-COINCIDENCES IN K(0)-STANDARDIZED NAA WITH COUNTING IN A LEPD [J].

DECORTE, F ;

FREITAS, MC .

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES, 1992, 160 (01) :253-267

[4]

Jovanovic S., 1992, P INT K0 USERS WORKS, P59

[5] CALCULATION OF THE ABSOLUTE PEAK EFFICIENCY OF GAMMA-RAY DETECTORS FOR DIFFERENT COUNTING GEOMETRIES [J].

MOENS, L ;

DEDONDER, J ;

LIN, X ;

DECORTE, F ;

DEWISPELAERE, A ;

SIMONITS, A ;

HOSTE, J .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH, 1981, 187 (2-3) :451-472

[6]

VANSLUIJS R, 1992, P INT K0 USERS WORKS, P11

← 1 →