Efficiency calibration of a coaxial HPGe detector-Marinelli beaker geometry using an 152Eu source prepared in epoxy matrix and its validation by efficiency transfer method

Yücel, Haluk; Zümrüt, Senem; Narttürk, Recep Bora; Gedik, Gizem

doi:10.1016/j.net.2018.09.024

Cited by 13 publications

(2 citation statements)

References 8 publications

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“…To identify radionuclides and to find their amount in a sample, the efficiency of the detector must be calibrated in advance for an energy range of interest. A reliable method for this kind of calibration is to use standard sources in exact one-to-one geometry, position, and matrix of the sample, but it is time-and resource-consuming [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effect of copper contact pin on efficiency in HPGe detectors using Monte Carlo method

Uyar¹,

Aksoy²,

Ünlü³

et al. 2021

J. Inst.

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The full energy peak efficiency (FEPE) determined by experimental or Monte Carlo (MC) simulation methods is a very important parameter in HPGe detectors. Since FEPE depends on the detector's geometric parameters, the parameters provided by the manufacturer are of great importance in modeling the detector with the MC method. The most important reason for the discrepancy between MC and experimental calculations is the lack of accurate information about the detector's geometric properties. The thickness of the copper contact pin in the middle of the detector hole is not given by the manufacturer. In this study, the effect of copper contact pin thickness on detector efficiency was investigated by using the PHITS 3.24 MC simulation program both at different copper contact pin radii and at different detector-source distances. The efficiency values were calculated for photons in the energy range of 59.5 keV-1408 keV, at 4 different distances, namely 5 cm, 13.25 cm, 15 cm, and 20 cm and for the radii of copper contact pins increased from 1 mm to 3.5 mm at 0.5 mm intervals. According to the results, it has been determined that the presence of copper contact pins causes a change in detector efficiency up to 1.9%, especially in the high energy region, and has no effect on the detector efficiency in the low energy region. In addition, it has been observed that the effect of copper contact pin thickness on detector efficiency is almost independent of the source-detector distance.

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Section: Introductionmentioning

confidence: 99%

Investigation of the effect of copper contact pin on efficiency in HPGe detectors using Monte Carlo method

Uyar¹,

Aksoy²,

Ünlü³

et al. 2021

J. Inst.

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“…In recent years, the use of the Monte Carlo technique to simulate the efficiency of a detector in x-and γ-ray spectroscopy has become extensively popular [1][2][3][4][5][6][7][8][9]. However, some inconsistencies between the simulated and the experimental efficiencies have been reported in the literature [10][11][12][13][14], for many types of detectors.…”

Section: Introductionmentioning

confidence: 99%

Determination of Si(Li) detector efficiency by experimental and Monte Carlo simulation methods

Zadehrafi¹,

Luca²,

Ioan³

2021

Phys. Scr.

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In this study, a Si(Li) detector was modeled by MCNP (Monte Carlo n-particle) code and its efficiency was estimated by Monte Carlo simulation in the photon energy range of 5.9–59.54 keV. Experimental measurements using 55Fe, 57Co, and 241Am radioactive standard sources were performed for validation of the applied simulation code. The primary results of the simulation were compared with the experimental ones and considerable discrepancies were observed, especially in the low energy region. Since the dead layers’ thicknesses are not always precisely provided by the manufacturer and even can change during detector aging, they were assumed as the cause of these discrepancies (front dead layer’s thickness being a critical parameter for low energy photons). After adjusting the thicknesses of the front and rear dead layers in a step-by-step procedure, a reasonable agreement was achieved between the simulated and experimental results. The results of this study indicate that if performing an experiment by the detector is difficult for any reason in some energies, one can rely on the MCNP code as an operational tool by interpolation or extrapolation of the available experimental efficiency data (in low energy region).

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Investigating the practicality of a minimally defined co-axial HPGe detector model using MCNP

Goodell

Roberts

2019

J Radioanal Nucl Chem

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Efficiency calibration of a coaxial HPGe detector-Marinelli beaker geometry using an 152Eu source prepared in epoxy matrix and its validation by efficiency transfer method

Cited by 13 publications

References 8 publications

Investigation of the effect of copper contact pin on efficiency in HPGe detectors using Monte Carlo method

Investigation of the effect of copper contact pin on efficiency in HPGe detectors using Monte Carlo method

Determination of Si(Li) detector efficiency by experimental and Monte Carlo simulation methods

Investigating the practicality of a minimally defined co-axial HPGe detector model using MCNP

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