Matrix effects in the activity measurement of environmental samples—implementation of specific corrections in a gamma-ray spectrometry analysis program

1997 ◽  
Vol 48 (1) ◽  
pp. 59-69 ◽  
Author(s):  
O. Sima ◽  
C. Dovlete
Keyword(s):  
Environmental Samples ◽  
Gamma Ray ◽  
Matrix Effects ◽  
Gamma Ray Spectrometry ◽  
Activity Measurement ◽  
Analysis Program ◽  
Spectrometry Analysis

scholarly journals A gamma-ray spectrometry analysis software environment

2018 ◽  
Vol 134 ◽  
pp. 200-204 ◽  
Author(s):  
G. Lutter ◽  
M. Hult ◽  
G. Marissens ◽  
H. Stroh ◽  
F. Tzika
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Spectrometry ◽  
Analysis Software ◽  
Software Environment ◽  
Spectrometry Analysis

scholarly journals Study of the minimum detectable activity in gamma-ray spectrometry with various shielding configurations

2017 ◽  
Vol 1 (T4) ◽  
pp. 56-62
Author(s):  
Vuong Quang Le ◽  
Nguyen Hoang Vo ◽  
Chuong Dinh Huynh ◽  
Phuc Minh Lau ◽  
Thanh Thien Tran ◽  
...  
Keyword(s):  
Environmental Samples ◽  
Gamma Ray ◽  
Background Radiation ◽  
Environmental Radioactivity ◽  
Minimum Detectable Activity ◽  
The Other ◽  
Gamma Ray Spectrometry ◽  
Gamma Spectrometer ◽  
Detectable Activity ◽  
Gamma Ray Spectrometer

In the environmental radioactivity analyzing methods using gamma-ray spectrometry, the natural activities of radionuclides were required to be higher than the minimum detectable activity (MDA). To reduce MDA, one of the popular methods is to improve the ability of reducing the background radiation of the gamma-ray spectrometry. In this work, we designed the shielding configuration with 5 cm lead and 2 mm copper (thickness of walls and top). The MDAs of gamma-ray spectrometer were 2.6–4.24 times times for 40K (1460.8 keV), 232Th (208Tl- 2614.5 keV) and 238U (214Pb- 352 keV; 214Bi- 609.3 keV, 214Bi- 1764.5 keV). In the other hand, MDA for 238U with this shielding configuration is smaller than the activity of 238U inside surface soils in Vietnam. These results showed that the gamma spectrometer with NaI(Tl) detector and this shielding configuration was suitable for measurements activity of 238U in the environmental samples.

Correction by self-attenuation in gamma-ray spectrometry for environmental samples

2006 ◽  
Vol 270 (2) ◽  
pp. 339-343 ◽  
Author(s):  
L. S. Quindós ◽  
C. Sainz ◽  
I. Fuente ◽  
J. Nicolás ◽  
L. Quindós ◽  
...  
Keyword(s):  
Environmental Samples ◽  
Gamma Ray ◽  
Gamma Ray Spectrometry

scholarly journals The dependence of Ge detectors efficiency on the density of the samples in gamma-ray spectrometry

2007 ◽  
Vol 22 (2) ◽  
pp. 58-63 ◽  
Author(s):  
Ivana Vukasinovic ◽  
Dragana Todorovic ◽  
Dragana Popovic
Keyword(s):  
Energy Range ◽  
Gamma Spectrometry ◽  
Environmental Samples ◽  
Gamma Ray ◽  
Milk Powder ◽  
Counting Efficiency ◽  
Standard Reference Materials ◽  
Gamma Ray Spectrometry ◽  
Regression Parameters ◽  
Hpge Detectors

The effect of the density of environmental samples on the counting efficiency of Ge detectors used in gamma-spectrometry was studied. The dependence ?ff(?) was determined for two HPGe detectors (relative efficiencies 18% and 20%) using five radioactive standard reference materials (silicone resins, epoxy resin, milk powder, soil) with different matrix densities (0.45-1.22 g/cm3) in Marinelli beakers (V = 500 cm3). The dependence of efficiency vs. density was found to be linear and the regression parameters for energies in the range of 60-2000 keV were determined, too. The effect of variation in density on the counting efficiency of Ge detectors is dominant in the range of lower energies (60-600 keV) and de creases with energies in the higher energy range.

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