Efficiency calibration and coincidence summing correction for a large volume (946 cm3) LaBr3(Ce) detector: GEANT4 simulations and experimental measurements

Dhibar, M.; Mankad, Dvij; Mazumdar, I.; Kumar, G. Anil

doi:10.1016/j.apradiso.2016.08.013

Cited by 7 publications

(3 citation statements)

References 25 publications

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“…Uncertainty also originates from the photo peak detection efficiency, estimated using GEANT4 simulations. We have worked extensively in characterisation and simulations of various inorganic scintillators over a wide range of energies [34,38,39]. The photo peak detection efficiency uncertainty was determined to be ∼1%.…”

Section: Protonmentioning

confidence: 99%

Measurement of proton induced absolute production cross-section of 6.13, 6.92 and 7.12 MeV γ-rays from ¹⁶O(p,p ′γ )¹⁶O reaction

Ranga,

Mazumdar,

Weppner

et al. 2024

J. Phys. G: Nucl. Part. Phys.

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In this article, we report the absolute production cross-section of 6.13, 6.92 and 7.12 MeV γ-rays from the 16O(p,p′γ)16O reaction for incident proton energy range of 8-16 MeV. Angular distributions of the three γ-rays have been measured for seven angles at 9 MeV proton energy. A detailed phenomenological optical model potential (OMP) was set up to analyse the cross-section data. The OMP parameters were optimised using elastic, polarization and total reaction data available in the literature for protons and neutrons. Low-lying states of 16O were coupled, the optical potential was deformed using deformation parameters, and several resonances were included in the calculations to account for the nuclear structure effects. The potentials so generated have been used to calculate the differential and total cross sections for both 16O(p,p′)16O and 16O(p,p′γ)16O reactions.Our calculated cross-sections are in fairly good agreement with our measured data for 6.13, 6.92 and 7.12 MeV γ-rays. However, there still exist discrepancies in reproduction of the finer details of the cross sections. The comparisons of the calculations with the data bring forth the rather complex roles of channel couplings, resonances in the p+16O system and target deformation in the variation of the cross sections with projectile energy. The increased contribution of nuclear structure effects in light mass nuclei, leads to an apparent loss of predictive power of the theoretical calculation, as we approach the low-energy region of less than 10 MeV projectile energy.

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Section: Protonmentioning

confidence: 99%

Measurement of proton induced absolute production cross-section of 6.13, 6.92 and 7.12 MeV γ-rays from ¹⁶O(p,p ′γ )¹⁶O reaction

Ranga,

Mazumdar,

Weppner

et al. 2024

J. Phys. G: Nucl. Part. Phys.

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“…Nowadays, mathematical efficiency calibration is gaining popularity, owing to its broad applications [ 5 ]. Some other major benefits over empirical efficiency calibration are the ability to optimize the surveying conditions, for example, by adjusting various geometrical parameters such as dimensions, locations of sample and detector, and other modifications in the composition and proportions of samples analyzed [ 6 , 7 ]. However, physically altering these parameters each time, which may affect the detector’s performance, generates situations that may be costly and time-consuming for users [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

A closer look at the efficiency calibration of LaBr3(Ce) and NaI(Tl) scintillation detectors using MCNPX for various types of nuclear investigations

ALMisned

Zakaly

Ali

et al. 2022

Heliyon

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“…For close geometries, this effect is dominant, while it decreases with an increase of source-to-detector distance [1]. The determination of coincidence summing correction factors in gamma spectrometry was the subject of many publications [2,3,4,5], while in the past two decades, the solving of this problem gained a new dimension by introducing the Monte-Carlo method [6,7,8]. For the purpose of this research, a 22 Na point source was axially positioned at nine different distances from the detector end-cap.…”

Section: Introductionmentioning

confidence: 99%

DETERMINATION OF COINCIDENCE SUMMING CORRECTION FACTORS FOR ²²Na POINT SOURCE

Jevremović¹,

Kandić²,

Djurašević³

et al. 2019

RAD Conference Proceedings

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The coincidence summing effect plays an important role in HPGe spectrometry, especially at low sourcedetector distances, due to a large solid angle; therefore, the calculation of correction factors is necessary. The aim of the research described in this paper was to compare values of correction factors for a 22 Na point source obtained using the GESPECOR software package (Monte-Carlo method) and experimentally obtained values. Measurements were performed using a semiconductor HPGe spectrometer and the point source axially positioned at nine different distances from the detector end-cap. For the purpose of determining correction factors, a system of equations was formed, which, besides nuclear data as the input parameters, uses the experimentally obtained values of the total count in the entire spectrum, as well as the counts in the full energy peaks. The system of equations was solved for each particular case and correction factors were determined. By comparing the results obtained using the experimental and Monte-Carlo method, it was found that the correction factors for the 22 Na point source have discrepancies less than 3%. The significance of these discrepancies was also verified from a statistical point of view using a Student's t-test.

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Efficiency calibration and coincidence summing correction for a large volume (946 cm3) LaBr3(Ce) detector: GEANT4 simulations and experimental measurements

Cited by 7 publications

References 25 publications

Measurement of proton induced absolute production cross-section of 6.13, 6.92 and 7.12 MeV γ-rays from ¹⁶O(p,p ′γ )¹⁶O reaction

Measurement of proton induced absolute production cross-section of 6.13, 6.92 and 7.12 MeV γ-rays from ¹⁶O(p,p ′γ )¹⁶O reaction

A closer look at the efficiency calibration of LaBr3(Ce) and NaI(Tl) scintillation detectors using MCNPX for various types of nuclear investigations

DETERMINATION OF COINCIDENCE SUMMING CORRECTION FACTORS FOR ²²Na POINT SOURCE

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Efficiency calibration and coincidence summing correction for a large volume (946 cm3) LaBr3(Ce) detector: GEANT4 simulations and experimental measurements

Cited by 7 publications

References 25 publications

Measurement of proton induced absolute production cross-section of 6.13, 6.92 and 7.12 MeV γ-rays from 16O(p,p ′γ )16O reaction

Measurement of proton induced absolute production cross-section of 6.13, 6.92 and 7.12 MeV γ-rays from 16O(p,p ′γ )16O reaction

A closer look at the efficiency calibration of LaBr3(Ce) and NaI(Tl) scintillation detectors using MCNPX for various types of nuclear investigations

DETERMINATION OF COINCIDENCE SUMMING CORRECTION FACTORS FOR 22Na POINT SOURCE

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Measurement of proton induced absolute production cross-section of 6.13, 6.92 and 7.12 MeV γ-rays from ¹⁶O(p,p ′γ )¹⁶O reaction

Measurement of proton induced absolute production cross-section of 6.13, 6.92 and 7.12 MeV γ-rays from ¹⁶O(p,p ′γ )¹⁶O reaction

DETERMINATION OF COINCIDENCE SUMMING CORRECTION FACTORS FOR ²²Na POINT SOURCE