Import Geant4 10.0.0 source tree
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Gabriele Cosmo
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//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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/*
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* File: G4WattFissionSpectrumValues.hh
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* Author: B. Wendt (wendbryc@isu.edu)
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*
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* Created on July 11, 2011, 11:32 AM
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*/
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/* * * * * * * * * * * * * * * * References * * * * * * * * * * * * * * * *
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* *
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* 1. MCNP - A General Monte carlo N-Particle Transport Code, Version 5, *
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* X-5 Monte Carlo Team, Volume I: Overview and Theory, April, 2005 *
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* *
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* * * * * * * * * * * * * * * * References * * * * * * * * * * * * * * * */
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#ifndef G4WATTFISSIONSPECTRUMVALUES_HH
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#define G4WATTFISSIONSPECTRUMVALUES_HH
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#include "globals.hh"
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#include "G4FFGDefaultValues.hh"
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#include "G4FFGEnumerations.hh"
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// TODO Migrate to existing neutron_hp watt constants in G4NeutronHPWattSpectrum.hh
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// and then remove this file from the repo and sources.cmake
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/** WattSpectrumConstants contains constants and other variables for use in
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* sampling the Watt fission spectrum.
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*/
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struct WattSpectrumConstants
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{
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/** Isotope code in ZZZAAA format for which the Watt fission
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* spectrum is being sampled
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*/
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G4int Product;
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/** Fission cause for which the Watt fission spectrum is being
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* sampled
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*/
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G4FFGEnumerations::FissionCause Cause;
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/** Energy, if any, of the incident particle that cause the fission */
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G4double Energy;
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/** Sampling constant. Calculated as:
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* \f[
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* L = \frac{[K + (K^2 - 1)^\frac{1}{2}]}{a}
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* \f]
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* \f[
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* K = 1 + \frac{b}{8a}
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* \f]
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*/
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G4double L;
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/** Sampling constant. Calculated as:
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* \f[
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* M = a*L-1
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* \f]
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*/
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G4double M;
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/** Sampling constant taken from the data tables. */
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G4double B;
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};
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/** These are the energy values in MeV for the neutron induced Watt fission
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* spectrum constants.
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*/
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static const G4double IncidentEnergyBins[] =
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{
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G4FFGDefaultValues::ThermalNeutronEnergy,
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1.0 * MeV,
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14.0 * MeV,
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-1 // End of array
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};
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/** Watt fission spectrum constants for neutron induced fission.
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* \n <b> Constants </b>
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* \n Column 1: 'a' value
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* \n Column 2: 'b' value
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*
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* \n <b> Incident Neutron Energies </b>
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* \n Row 1: Thermal (~0.025 eV)
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* \n Row 2: 1 MeV
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* \n Row 3: 14 MeV
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*/
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static const G4double NeutronInducedWattConstants[][3][2] =
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{
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// Default
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{ {0.95, 2.7},
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{1.0, 2.5},
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{1.05, 2.4}, },
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// Thorium
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// 90232
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{ {1.0888, 1.6871},
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{1.1096, 1.6316},
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{1.1700, 1.4610}, },
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// Uranium
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// 92233
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{ {0.977, 2.546},
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{0.977, 2.249},
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{1.0036, 2.6377}, },
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// 92235
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{ {0.988, 2.249},
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{0.988, 2.249},
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{1.028, 2.084}, },
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// 92238
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{ {0.88111, 3.4005},
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{0.89506, 3.2953},
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{0.96534, 2.8330}, },
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// Plutonium
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// 94239
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{ {0.966, 2.842},
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{0.966, 2.842},
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{1.055, 2.383}, }
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};
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/** This table provides the indexing for NeutronInducedWattConstants_. The
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* index of an isotope in this table is the index for the Watt fission spectrum
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* constants in NeutronInducedWattConstants_. The isotopes are listed in ZZZAAA
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* format.
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*/
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static const G4int NeutronInducedWattIsotopesIndex[] =
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{
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// Default
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0,
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// Thorium
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90232,
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// Uranium
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92233,
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92235,
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92238,
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// Plutonium
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94239,
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// End of array
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-1
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};
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/** Watt fission spectrum constants for spontaneous fission.
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* \n Column 1: 'a' value
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* \n Column 2: 'b' value
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*/
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static const G4double SpontaneousWattConstants[][2] =
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{
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// Default
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{0.8, 4.0},
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// Plutonium
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// 94240
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{0.799, 4.903},
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// 94242
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{0.833668, 4.431658},
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// Curium
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// 96242
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{0.891, 4.046},
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// 96244
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{0.906, 3.848},
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// Californium
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// 98252
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{1.025, 2.926}
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};
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/** This table provides the indexing for SpontaneousWattConstants_. The index of
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* an isotope in this table is the index for the Watt fission spectrum constants
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* in SpontaneousWattConstants_. The isotopes are listed in ZZZAAA format.
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*/
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static const G4int SpontaneousWattIsotopesIndex[] =
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{
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// Default
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0,
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// Plutonium
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94240,
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94242,
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// Curium
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96242,
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96244,
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// Californium
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98252,
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// End of array
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-1
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};
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#endif /* G4WATTFISSIONSPECTRUMVALUES_HH */
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