Cascade summing in gamma-ray spectrometry in marinelli-beaker geometries: the third efficiency curve

Blaauw, M.; Gelsema, S.J.

doi:10.1016/s0168-9002(03)01075-1

Cited by 31 publications

(4 citation statements)

References 11 publications

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“…However such analysis is difficult to achieve for the close geometry measurements and large volume samples because in volumetric sources the contribution of the scattered γ-rays to the total efficiency cannot be neglected [11]. Many authors proposed an approach of point sources positioned in the matrix of the extended source for the calculation of peak, total efficiencies and CSF [4, [12][13][14][15]. Tk Wang,et al [4] include the effects of volume factor in the CSF values and observed a good agreement between calculated and experimental results.…”

Section: Introductionmentioning

confidence: 99%

Coincidence Summing Correction for Cylinder and Marinelli Beaker Sources by Monte Carlo Simulation

Waseem¹,

Chaohui²,

Yu³

2019

Int J At Nucl Phys

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Coincidence summing effects arises when two or more γ-rays are emitted in a cascade from an excited nucleus and are detected within the resolving time of the detector. Without correction of such effects, the activity of radionuclides cannot be accurately determined. For the correction of summing effects, a new simulation method in GEANT4 was established to simulate the coincidence summing correction factors (CSF simu ) for an HPGe detector. In the simulation, a cylindrical and Marinelli beaker source containing several radionuclides were used with different volumes, covering the energy range from 59.50 keV to 1836.01 keV. In the case of volumetric sources, the coincidence summing correction factors for two nuclides ( 60Co and 88 Y) were calculated from the efficiencies at different points throughout the source volume. The dependence of the coincidence correction factor on the sample density was also carried out for some particular nuclide and photon energy. The same methodology of coincidence summing correction factor was applied for the complex decay scheme of 133 Ba and 152 Eu obtained a good agreement with the experimental results.

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Section: Introductionmentioning

confidence: 99%

Coincidence Summing Correction for Cylinder and Marinelli Beaker Sources by Monte Carlo Simulation

Waseem¹,

Chaohui²,

Yu³

2019

Int J At Nucl Phys

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“…The type of these measurements needs the geometry of source-to-detector to be closer to each other, especially in the case of bulk radioactive samples in the form of a disk, cylinder, Marinelli beakers, and any other irregular sample in shape. These conditions of measurement give a chance to increase the coincidence summing effects (COI), mostly for the radionuclide's decay scheme in the complicated structure [7][8][9]. The coincidence summing phenomenon can simply change the precision in 𝛾-ray spectroscopy and give un-estimated results.…”

Section: Introductionmentioning

confidence: 99%

Measurements correlated to efficiency studies of NaI(Tl) scintillator with vertical hexagonal radioactive source

Badawi

Thabet

2021

J. Inst.

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Nowadays, many scientists work on the geometry change between source-to-detector arrangement to calibrate the 3”× 3” γ-ray NaI(Tl) detector based on the available sample shape in the laboratory. The calculated full-energy peak efficiency is more sensitive in radiation activity determination and can be estimated build on complex analytical and numerical techniques. In the present study, the full-energy peak and total efficiencies beside the peak-to-total ratio (P/T) for γ-ray NaI(Tl) detector concerning vertical hexagonal ^152Eu radioactive source is calculated for all γ-rays involved in the cascade and estimate the suitable correction for coincidence summing effects (COI) by mean of the numerical simulation method (NSM). The extra factors which cause the γ-ray attenuation taken into consideration as well, such as, source composition materials, “self-attenuation within the source itself”, the detector end cap with the other supporting materials around the detector crystal, the source container material, and the holder used during the measurement process. The theory of this methodology depends on the efficiency transfer technique; calculate the effective solid angle, that be positioned in between the source-to-detector system, besides estimating the path lengths of the γ-rays inside the hexagonal ^152Eu radioactive sources and the active medium inside the detector itself as well. The results gained in the present work gave an agreement between simulation and measured data. The results show that to improve the accuracy of the γ-rays detector efficiency, many technical and methodological aspects of the present method are fitting and possible for applications inside the radiation laboratory, industrial, and medical sectors.

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“…Thus, for added accuracy in gamma-ray spectroscopy, the corrections for the coincidence summing effects are highly desirable. Several algorithms and empirical equations have been developed in the literature to take into account these effects (Arnold & Sima, 2004;Blaauw & Gelsema, 2003;Dias, Koskinas, & Takeda, 2002;Tomarchio & Rizzo, 2011;Vidmar, Kanisch, & Vidmar, 2011) The peak-to-total ratio (P/ T) is an established method for coincidence summing effects corrections in the gamma-ray spectrometry field (ANSI, 1999). However, the method is not used in routine measurements due to the elaborate work involved in its implementation, especially for close geometry measurements (Lee, Park, & Woo, 2008).…”

Section: Introductionmentioning

confidence: 99%

Coincidence summing corrections in HPGe gamma-ray spectrometry for Marinelli-beakers geometry using peak to total (P/T) calibration

Ababneh

Eyadeh

2015

Journal of Radiation Research and Applied Sciences

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Peak-to-total (P/T) calibration Gamma ray spectrometry Gennie 2000 a b s t r a c tThe coincidence summing corrections for an HPGe spectrometer with Marinelli-beaker geometry were calculated using the peak-to-total (P/T) calibration method in combination with the algorithms implemented in the Genie 2000 software. The P/T ratios were calculated for different energies and three types of beaker contents: air, powder milk and soil. The validity of the correction was tested against a standard sample and showed excellent agreement with the certified data. The corrections were also in good agreement with published data in the literature.

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Cascade summing in gamma-ray spectrometry in marinelli-beaker geometries: the third efficiency curve

Cited by 31 publications

References 11 publications

Coincidence Summing Correction for Cylinder and Marinelli Beaker Sources by Monte Carlo Simulation

Coincidence Summing Correction for Cylinder and Marinelli Beaker Sources by Monte Carlo Simulation

Measurements correlated to efficiency studies of NaI(Tl) scintillator with vertical hexagonal radioactive source

Coincidence summing corrections in HPGe gamma-ray spectrometry for Marinelli-beakers geometry using peak to total (P/T) calibration

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