Estimating thickness of the inner dead-layer of n-type HPGe detector

Chương, Huỳnh Đình; Thanh, Tran Thien; Trang, Le Thi Ngoc; Nguyen, Vo Hoang; Tạo, Châu Văn

doi:10.1016/j.apradiso.2016.08.010

Cited by 23 publications

(9 citation statements)

References 12 publications

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“…This especially applies to HPGe detectors, where the manufacturer often only provides the most basic information, e.g., crystal size and weight. X-ray imaging is a non-destructive method to obtain excellent geometry data for the crystal [28], however not the full volume of the crystal might be active volume, see Section 4.…”

Section: Methodsmentioning

confidence: 99%

“…We have previously used direct γ-ray emissions from the proton capture resonance of 27 Al(p,γ) 28 Si at E p = 3674.4 keV [5]. As the measurements take about a day, the intensity uncertainties are high, and angular distributions must be corrected for, we no longer perform these regularly.…”

Section: Experimental Efficiency Calibrationmentioning

confidence: 99%

“…The implementation was tested with 226 Ra, 56 Co, and 27 Al(p,γ) 28 Si calibration data [12]. In addition, a calibration data set with 226 Ra, 56 Co, 66 Ga, and 24 Al was used from an experiment with the SONIC-V3-∆EE target chamber.…”

Section: Detector Geometrymentioning

confidence: 99%

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Efficient determination of HPGe γ-ray efficiencies at high energies with ready-to-use simulation software

Mayer

Hoemann

Müllenmeister

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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The full-energy-peak efficiency of HPGe detectors at γ-ray energies around 10 MeV is not easily accessible with experimental methods. Monte-Carlo simulations with Geant4 can provide these efficiencies. G4Horus is a ready-to-use Geant4 application for the HORUS HPGe-detector array. Users can configure the modular parts to match their experiment with minimal knowledge of the simulation software and limited time commitment. In our case, knowing and implementing the geometry with high precision is the biggest challenge. To implement the different target chambers, we transform the existing CAD models to Geant4 geometry with CADMesh. We also found a large discrepancy between experimental and simulated efficiency for some older HPGe detectors, which could be remedied by introducing a large dead region around the inner core. This project is open source and available from https://github.com/janmayer/G4Horus [1]. We invite everyone to adapt the project or adopt parts of the code for other projects.

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Section: Methodsmentioning

confidence: 99%

Section: Experimental Efficiency Calibrationmentioning

confidence: 99%

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Efficient determination of HPGe γ-ray efficiencies at high energies with ready-to-use simulation software

Mayer

Hoemann

Müllenmeister

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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show abstract

“…En estos casos, las fuentes gamma de baja energía no serían adecuadas para caracterizar esta capa muerta, pues serían atenuadas antes de alcanzarla. Empleando energías altas (generalmente por encima de 500 keV) sí que sería posible, aunque el efecto de este parámetro podría verse enmascarado por otros focos de incertidumbre como el del volumen del cristal de germanio (Chuong et al 2016).…”

Section: Calibración En Eficiencia Y Caracterización Del Detector Medunclassified

“…Cada caso tiene en cuenta las capas inactivas externas óptimas logradas en el apartado anterior. (Blank et al 2015;Chuong et al 2016;García-Talavera et al 2000), obteniéndose resultados que, aunque todavía no están completamente ajustados, mejoran notablemente el modelo. En consecuencia, para alcanzar resultados aceptables para las tres geometrías, es necesario estudiar un parámetro adicional que afecte a altas energías, pero no a bajas en la medida de lo posible.…”

Section: Capa Inactiva Internaunclassified