src/physics/MaterialProperties.hpp

Utility to register unit conversions with the framework’s unit system. More…

Namespaces

Name
allpix Helper class to hold support layers for a detector model.

Attributes

	Name
std::map< SensorMaterial, double >	ionization_energies Ionization / charge creation energy for different materials.
std::map< SensorMaterial, double >	fano_factors Fano factors for different materials.

Detailed Description

Utility to register unit conversions with the framework’s unit system.

Copyright: Copyright (c) 2022-2025 CERN and the Allpix Squared authors. This software is distributed under the terms of the MIT License, copied verbatim in the file “LICENSE.md”. In applying this license, CERN does not waive the privileges and immunities granted to it by virtue of its status as an Intergovernmental Organization or submit itself to any jurisdiction. SPDX-License-Identifier: MIT

Attributes Documentation

variable ionization_energies

static std::map< SensorMaterial, double > ionization_energies = {
        {SensorMaterial::SILICON, 3.64e-6},
        {SensorMaterial::GALLIUM_ARSENIDE, 4.2e-6},
        {SensorMaterial::GALLIUM_NITRIDE,
         8.33e-6}, 
        {SensorMaterial::GERMANIUM, 2.97e-6},         
        {SensorMaterial::CADMIUM_TELLURIDE, 4.43e-6}, 
        {SensorMaterial::CADMIUM_ZINC_TELLURIDE, 4.6e-6},
        {SensorMaterial::DIAMOND, 13.1e-6},             
        {SensorMaterial::SILICON_CARBIDE, 7.6e-6},      
        {SensorMaterial::CESIUM_LEAD_BROMIDE, 5.3e-6}};

Ionization / charge creation energy for different materials.

Warning: All values in framework-internal units, here: MeV

variable fano_factors

static std::map< SensorMaterial, double > fano_factors = {
        {SensorMaterial::SILICON, 0.115},
        {SensorMaterial::GALLIUM_ARSENIDE, 0.14},
        {SensorMaterial::GALLIUM_NITRIDE,
         0.07}, 
        {SensorMaterial::GERMANIUM, 0.112},             
        {SensorMaterial::CADMIUM_TELLURIDE, 0.24},      
        {SensorMaterial::CADMIUM_ZINC_TELLURIDE, 0.14}, 
        {SensorMaterial::DIAMOND, 0.382},               
        {SensorMaterial::SILICON_CARBIDE, 0.1},         
        {SensorMaterial::CESIUM_LEAD_BROMIDE,
         0.1}};

Fano factors for different materials.

Source code


#ifndef ALLPIX_PROPERTIES_H
#define ALLPIX_PROPERTIES_H

#include "core/geometry/DetectorModel.hpp"

namespace allpix {

    static std::map<SensorMaterial, double> ionization_energies = {
        {SensorMaterial::SILICON, 3.64e-6},
        {SensorMaterial::GALLIUM_ARSENIDE, 4.2e-6},
        {SensorMaterial::GALLIUM_NITRIDE,
         8.33e-6}, // https://etd.ohiolink.edu/apexprod/rws_etd/send_file/send?accession=osu1448405475
        {SensorMaterial::GERMANIUM, 2.97e-6},         // https://doi.org/10.1016/0883-2889(91)90002-I
        {SensorMaterial::CADMIUM_TELLURIDE, 4.43e-6}, // https://doi.org/10.1016/0029-554X(74)90662-4
        {SensorMaterial::CADMIUM_ZINC_TELLURIDE, 4.6e-6},
        {SensorMaterial::DIAMOND, 13.1e-6},             // https://doi.org/10.1002/pssa.201600195
        {SensorMaterial::SILICON_CARBIDE, 7.6e-6},      // https://doi.org/10.1109/NSSMIC.2005.1596542
        {SensorMaterial::CESIUM_LEAD_BROMIDE, 5.3e-6}}; // https://doi.org/10.1038/s41467-018-04073-3

    static std::map<SensorMaterial, double> fano_factors = {
        {SensorMaterial::SILICON, 0.115},
        {SensorMaterial::GALLIUM_ARSENIDE, 0.14},
        {SensorMaterial::GALLIUM_NITRIDE,
         0.07}, // https://etd.ohiolink.edu/apexprod/rws_etd/send_file/send?accession=osu1448405475
        {SensorMaterial::GERMANIUM, 0.112},             // https://doi.org/10.1016/0883-2889(91)90002-I
        {SensorMaterial::CADMIUM_TELLURIDE, 0.24},      // https://doi.org/10.1016/j.nima.2018.09.025
        {SensorMaterial::CADMIUM_ZINC_TELLURIDE, 0.14}, // https://doi.org/10.1109/23.322857
        {SensorMaterial::DIAMOND, 0.382},               // https://doi.org/10.1002/pssa.201600195
        {SensorMaterial::SILICON_CARBIDE, 0.1},         // https://doi.org/10.1016/j.nima.2010.08.046
        {SensorMaterial::CESIUM_LEAD_BROMIDE,
         0.1}}; // Not yet measured, but assumed by authors https://doi.org/10.1038/s41566-020-00727-1
} // namespace allpix

#endif /* ALLPIX_PROPERTIES_H */

Updated on 2025-05-10 at 19:40:39 +0000