---

ReactorXC.hh File Reference

ReactorXC defines several useful functions for ReactorFsim. More...

#include "ReactorConstants.hh"
#include <math.h>
#include <iostream.h>
#include <string>

Go to the source code of this file.

Functions
double	U235flux (double)
double	RMPflux (double)
double	InverseBeta (double, double, int order=1)
void	PositronRange (double, double &, double &)
double	GammaComptonRange (std::string, double)
	Returns the mean free path of photons through a given material. More...
void	GammaCompton (double *)
void	MyGdDecayModel (double, int &, double *)
void	NeutronPropagator (double R0, double R2, double &ke, double &A, double &pass, double *pn, double *rn, double &tn, double Temperature, double *a, double *z, double *nn)

---

Detailed Description

ReactorXC defines several useful functions for ReactorFsim.

The individual functions are implimented in their respective cpp files.

Author: Tim Bolton

Definition in file ReactorXC.hh.

---

Function Documentation

double GammaComptonRange (  std::string   , double    )

Returns the mean free path of photons through a given material. The function GammaComptonRange is implimented in GammaComptonRange.cpp. The first input is a string defining the material through which the photon propogates. The supported materials are "scintillator" and "oil" which are defined by ReactorConstants.hh. The second input is the energy of the photon entering the material. The function returns a double equal to the mean free path calculated with the Klein-Nishina cross section. Definition at line 13 of file GammaComptonRange.cpp. { //cout << "gamma propogating through " << material << endl; // // Compute the mean free path for Compton scattering. // static double m = MELECTRON; static double alpha = 1/ALPHAINV; static double Units = XcMeVtoCmsqrd; // // Overall cross section scale // static double Thomson = 8*PI*alpha*alpha/3/m/m*Units; double w = egamma/m; // // Klein-Nishina cross section // double XC = 3*Thomson/4* ((1+w)/w/w/w*(2*w*(1+w)/(1+2*w)-log(1+2*w)) +log(1+2*w)/2/w-(1+3*w)/(1+2*w)/(1+2*w)); // // Need electron density to get mfp. Get H and C contributions. // static double Na = NAVOGADRO; static double A[2] = {A0,A1}; static double Z[2] = {Z0,Z1}; static double f[2]; if(material == "scintillator"){ f[0] = f0; f[1] = f1; } else if(material == "oil"){ f[0] = f4; f[1] = f5; } else{ cout << "GammaComptonRange: " << material << " is an unknown material! Assuming scintillator." << endl; f[0] = f0; f[1] = f1; } //for(int i=0;i<2;i++) cout << "f["<<i<<"] " << f[i] << endl; static double nel[2]; static bool first = 1; for(int i=0;i<2;i++){ nel[i]=Na*density*f[i]*Z[i]/A[i]; first = 0; } // // Compute mean free path. // return 1/((nel[0]+nel[1])*XC); }

---