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59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
/*
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EnergyLoss.h
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Code for calculating the energy loss of a charged, massive particle through an arbitrary medium.
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Based on code written by D.W. Visser at Yale for the original SPANC. Uses energy loss calulations
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described by Ziegler in various SRIM textbooks.
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Written by G.W. McCann Aug. 2020
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*/
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#ifndef ENERGYLOSS_H
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#define ENERGYLOSS_H
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#include <iostream>
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#include <string>
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#include <vector>
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#include <fstream>
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#include <cmath>
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#include "MassLookup.h"
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namespace Mask {
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class EnergyLoss {
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public:
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EnergyLoss();
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~EnergyLoss();
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double GetEnergyLoss(int zp, int ap, double e_initial, double thickness);
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double GetReverseEnergyLoss(int zp, int ap, double e_final, double thickness);
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double GetRange(double energy);
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void SetTargetComponents(std::vector<int>& Zt, std::vector<int>& At, std::vector<int>& Stoich);
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private:
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double GetElectronicStoppingPower(double energy);
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double GetNuclearStoppingPower(double energy);
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double GetTotalStoppingPower(double energy);
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double Hydrogen_dEdx_Low(double e_per_u, int z);
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double Hydrogen_dEdx_Med(double e_per_u, int z);
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double Hydrogen_dEdx_High(double e_per_u, double energy, int z);
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double CalculateEffectiveChargeRatio(double e_per_u, int z);
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int ZP, AP;
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double MP; //units of u, isotopic
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double comp_denom;
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std::vector<int> ZT, AT;
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std::vector<double> targ_composition;
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//constants for calculations
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static constexpr double MAX_FRACTIONAL_STEP = 0.001;
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static constexpr double MAX_DEPTH = 50;
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static constexpr double MAX_H_E_PER_U = 100000.0;
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static constexpr double AVOGADRO = 0.60221367; //N_A times 10^(-24) for converting
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static constexpr double MEV2U = 1.0/931.4940954;
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static constexpr double H_RESTMASS = 938.27231; //MeV, for beta calc
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};
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}
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#endif
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