Study on the increase of inactive germanium layer in a high-purity germanium detector after a long time operation applying MCNP code

Huy, Ngo Quang; Binh, Do Quang; Ân, Võ Xuân

doi:10.1016/j.nima.2006.12.048

Cited by 80 publications

(34 citation statements)

References 11 publications

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“…[5]. In that paper, the authors verified the length of their detector with X-ray radiography and determined a value very close to that stated by the manufacturer.…”

Section: 3supporting

confidence: 58%

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Monte Carlo modelling of a N-type coaxial high purity germanium detector

Berndt¹,

Mortreau²

2012

Nuclear Instruments and Methods in Physics Research Section A:

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“…[5]. In that paper, the authors verified the length of their detector with X-ray radiography and determined a value very close to that stated by the manufacturer.…”

Section: 3supporting

confidence: 58%

“…By way of examples, a few studies on this topic are listed in Refs. [1][2][3][4][5][6][7][8][9][10][11][12][13][14], except [12] concern P-type detectors. In most of these studies, substantial discrepancies between calculated and experimental data are observed.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo modelling of a N-type coaxial high purity germanium detector

Berndt¹,

Mortreau²

2012

Nuclear Instruments and Methods in Physics Research Section A:

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“…This kind of disagreement, especially overestimation by the simulation, has been seen in other studies that model the γ-ray efficiencies of HPGe detectors using the geometry provided by the manufacturer (e.g., Refs. [37][38][39][40]). Typically, the discrepancies have been attributed to physical characteristics of the detector (crystal location, Li-diffused-contact thickness, etc.)…”

Section: Photopeak Efficienciesmentioning

confidence: 99%

Cosmogenic-neutron activation ofTeO2and implications for neutrinoless double-βdecay experiments

et al. 2015

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Flux-averaged cross sections for cosmogenic-neutron activation of natural tellurium were measured using a neutron beam containing neutrons of kinetic energies up to ∼800 MeV, and having an energy spectrum similar to that of cosmic-ray neutrons at sea-level. Analysis of the radioisotopes produced reveals that 110m Ag will be a dominant contributor to the cosmogenic-activation background in experiments searching for neutrinoless double-beta decay of 130 Te, such as CUORE and SNO+. An estimate of the cosmogenic-activation background in the CUORE experiment has been obtained using the results of this measurement and cross-section measurements of proton activation of tellurium. Additionally, the measured cross sections in this work are also compared with results from semi-empirical cross-section calculations.

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“…Manufacturers provide usually detailed information about geometry and resolution, including sometimes features related to dead layer and electric contacts. However, in aged detectors, detector efficiency is deteriorated partially due to the dead layer thickness increasing and consequently the decreasing of the active detection volume (Huy et al, 2007). Thus, some significant discrepancies between simulated and experimental efficiencies have been reported in the literature (Ródenas et al, 2007;Huy, 2010).…”

Section: Introductionmentioning

confidence: 99%

Using lattice tools and unfolding methods for hpge detector efficiency simulation with the Monte Carlo code MCNP5

Querol

Gallardo

Ródenas

et al. 2015

Radiation Physics and Chemistry

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ElsevierQuerol Vives, A.; Gallardo Bermell, S.; Ródenas Diago, J.; Verdú Martín, GJ. (2015). Using lattice tools and unfolding methods for hpge detector efficiency simulation with the Monte Carlo code MCNP5. Radiation Physics and Chemistry. 116:219-225. doi:10.1016/j.radphyschem.2015.01.027. USING LATTICE TOOLS AND UNFOLDING METHODS FOR HPGE DETECTOR EFFICIENCY SIMULATION WITH THE MONTE CARLO CODE MCNP5A. Querol 1 , S. Gallardo, J. Ródenas and G. Verdú Instituto de Seguridad Industrial, Radiofísica y Medioambiental (ISIRYM)Universitat Politècnica de València, Valencia, Spain. AbstractIn environmental radioactivity measurements, High Purity Germanium (HPGe) detectors are commonly used due to their excellent resolution. Efficiency calibration of detectors is essential to determine activity of radionuclides. The Monte Carlo method has been proved to be a powerful tool to complement efficiency calculations. In aged detectors, efficiency is partially deteriorated due to the dead layer increasing and consequently, the active volume decreasing. The characterization of the radiation transport in the dead layer is essential for a realistic HPGe simulation. In this work, the MCNP5 code is used to calculate the detector efficiency. The F4MESH tally is used to determine the photon and electron fluence in the dead layer and the active volume. The energy deposited in the Ge has been analyzed using the *F8 tally. The F8 tally is used to obtain spectra and to calculate the detector efficiency. When the photon fluence and the energy deposition in the crystal are known, some unfolding methods can be used to estimate the activity of a given source. In this way, the efficiency is obtained and serves to verify the value obtained by other methods.

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Study on the increase of inactive germanium layer in a high-purity germanium detector after a long time operation applying MCNP code

Cited by 80 publications

References 11 publications

Monte Carlo modelling of a N-type coaxial high purity germanium detector

Monte Carlo modelling of a N-type coaxial high purity germanium detector

Cosmogenic-neutron activation ofTeO2and implications for neutrinoless double-βdecay experiments

Using lattice tools and unfolding methods for hpge detector efficiency simulation with the Monte Carlo code MCNP5

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