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https://github.com/gwm17/catima.git
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80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
/*
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* Author: Andrej Prochazka
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* Copyright(C) 2017
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef REACTIONS_H
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#define REACTIONS_H
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#include "catima/build_config.h"
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#ifdef NUREX
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#include "catima/structures.h"
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#include "catima/config.h"
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#include "catima/integrator.h"
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#include <cmath>
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#endif
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namespace catima{
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/**
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* return reaction probability
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* @param sigma - cross section in mb
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* @param t - number of targets per cm2 in 10^23 unit
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*/
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inline double reaction_rate(double sigma, double t){
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return 1.0 - std::exp(-sigma*t*0.0001);
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}
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/**
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* return nonreaction rate
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* @param sigma - cross section in mb
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* @param t - number of targets per cm2 in 10^23 unit
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*/
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inline double nonreaction_rate(double sigma, double t){
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return std::exp(-sigma*t*0.0001);
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}
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template<typename F>
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double reaction_rate(F& f, double t){
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GaussLegendreIntegration<8> ii;
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double i = ii.integrate(f,0,t);
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return 1.0 - std::exp(-i*0.0001);
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}
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double nonreaction_rate(Projectile &projectile, const Material &target, const Config &c=default_config);
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double production_rate(double cs, double rcs_projectile, double rcs_product, const Material &target, const Config &c=default_config);
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#ifndef NUREX
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double SigmaR_Kox(int Ap, int Zp, double E, int At, int Zt);
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inline double p_from_T(double T, double M=1.0){
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return M*sqrt(T*T + 2*T*atomic_mass_unit);
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}
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/*
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inline double Ecm_from_T_relativistic(double T, double Ap, double At){
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double mp = Ap*atomic_mass_unit;
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double mt = At*atomic_mass_unit;
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double plab= p_from_T(T,Ap);
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double elab = sqrt(plab*plab + mp*mp);
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double ecm = sqrt(mp*mp + mt*mt + 2*elab*mt);
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double pcm = plab * mt / ecm;
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return sqrt(pcm*pcm+mp*mp)-mp;
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}
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*/
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/// calculates Ecm fom T, return in MeV units
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inline double Ecm_from_T(double T, double Ap, double At){
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return T*Ap*At/(Ap+At);
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}
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#endif //NUREX
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#endif
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} // end of catime namespace
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