A general methodology to determine natural radionuclides by well-type HPGe detectors

被引：15

作者：

Barba-Lobo, A. ^{[1
]}

Miguel, E. G. San ^{[1
]}

Lozano, R. L. ^{[1
]}

Bolivar, J. P. ^{[1
]}

机构：

[1] Univ Huelva, Ctr Nat Resources Hlth & Environm RENSMA, Dept Integrated Sci, Huelva 21071, Spain

来源：

MEASUREMENT | 2021年 / 181卷

关键词：

Gamma-Alpha-particle spectrometry; Well-type Ge detectors; Efficiency calibration; Self-absorption correction; Anti-Compton system; NORM; GAMMA-RAY SPECTROMETRY; MONTE-CARLO CALCULATION; EFFICIENCY-CALIBRATION; BUILDING-MATERIALS; SAMPLES; WATER; SW; SIMULATION; ISOTOPES; RA-226;

D O I：

10.1016/j.measurement.2021.109561

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work aims to determine natural radionuclides (210Pb, 228,226Ra, 234,228Th and 40K) in NORM samples by well-type HPGe detectors because they are of vital importance in studies on environmental samples. For this, a novel methodology has been developed, based on obtaining a general function for the full-energy peak efficiency (FEPE) versus the sample apparent density and composition, keeping the sample height constant. To obtain the general FEPE function, a calibration in efficiency has been accomplished using certified standards provided by IAEA (RGU-1 and RGTh-1), and KCl. Besides, different self-absorption correction functions were compared for cylindrical geometry, where chemical compositions need to be known. Then, a study on using an anti-Compton system was done, getting a lower detection limit and allowing to propose gamma spectrometry as an alternative technique to alpha-particle spectrometry. Finally, the followed methodology to calculate the FEPE was subjected to internal and external validations, checking its validity range.

引用

页数：12

共 55 条

[1] Agha A.R, 2011, P 8 NUCL PART PHYS C, V43, P221
[2] In-Situ object calibration software (ISOCS) technique for 235U mass verification
Ahmed, Z.
[J]. MEASUREMENT, 2019, 145 : 648 - 650
[3] [Anonymous], 2004, NIST Standard Reference Database 46
[4] NIST Critically Selected Stability Constants of Metal Complexes Database
[5] SELF-ABSORPTION CORRECTIONS FOR WELL-TYPE GERMANIUM DETECTORS
APPLEBY, PG
RICHARDSON, N
NOLAN, PJ
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1992, 71 (02) : 228 - 233
[6] A general function for determining mass attenuation coefficients to correct self-absorption effects in samples measured by gamma spectrometry
Barba-Lobo, A.
Mosqueda, F.
Bolivar, J. P.
[J]. RADIATION PHYSICS AND CHEMISTRY, 2021, 179
[7] Mobility of Po and U-isotopes under acid mine drainage conditions: an experimental approach with samples from Rio Tinto area (SW Spain)
Barbero, L.
Gazquez, M. J.
Bolivar, J. P.
Casas-Ruiz, M.
Hierro, A.
Baskaran, M.
Ketterer, M. E.
[J]. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY, 2014, 138 : 384 - 389
[8] Po-210 and Pb-210 as atmospheric tracers and global atmospheric Pb-210 fallout: a Review
Baskaran, M.
[J]. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY, 2011, 102 (05) : 500 - 513
[9] Derivation of an efficiency-calibration simulation for a well-type HPGe detector using the Monte Carlo approach and analytical techniques
Belgin, E. Eren
Aycik, G. A.
[J]. RADIATION MEASUREMENTS, 2015, 73 : 36 - 45
[10] Accounting for 222Rn loss during oven drying for the immediate laboratory gamma-ray spectroscopy of collected soil samples
Benke, RR
Kearfott, KJ
[J]. APPLIED RADIATION AND ISOTOPES, 2000, 52 (02) : 271 - 287

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