Gabriele Cosmo
84 lines
4.1 KiB
C++
84 lines
4.1 KiB
C++
//
|
|
// ********************************************************************
|
|
// * License and Disclaimer *
|
|
// * *
|
|
// * The Geant4 software is copyright of the Copyright Holders of *
|
|
// * the Geant4 Collaboration. It is provided under the terms and *
|
|
// * conditions of the Geant4 Software License, included in the file *
|
|
// * LICENSE and available at http://cern.ch/geant4/license . These *
|
|
// * include a list of copyright holders. *
|
|
// * *
|
|
// * Neither the authors of this software system, nor their employing *
|
|
// * institutes,nor the agencies providing financial support for this *
|
|
// * work make any representation or warranty, express or implied, *
|
|
// * regarding this software system or assume any liability for its *
|
|
// * use. Please see the license in the file LICENSE and URL above *
|
|
// * for the full disclaimer and the limitation of liability. *
|
|
// * *
|
|
// * This code implementation is the result of the scientific and *
|
|
// * technical work of the GEANT4 collaboration. *
|
|
// * By using, copying, modifying or distributing the software (or *
|
|
// * any work based on the software) you agree to acknowledge its *
|
|
// * use in resulting scientific publications, and indicate your *
|
|
// * acceptance of all terms of the Geant4 Software license. *
|
|
// ********************************************************************
|
|
//
|
|
#include <cmath>
|
|
#include "G4Exp.hh"
|
|
#include "G4Log.hh"
|
|
#include "G4XpipNTotal.hh"
|
|
#include "G4SystemOfUnits.hh"
|
|
|
|
G4XpipNTotal::
|
|
G4XpipNTotal()
|
|
{
|
|
std::pair<double,double> it;
|
|
it.first=1105.46; it.second= 6.4; theLowEData.push_back(it);
|
|
it.first=1133.28; it.second= 18.0; theLowEData.push_back(it);
|
|
it.first=1165.12; it.second= 66.0; theLowEData.push_back(it);
|
|
it.first=1198.8; it.second= 160.; theLowEData.push_back(it);
|
|
it.first=1212.51; it.second= 199.; theLowEData.push_back(it);
|
|
it.first=1233.18; it.second= 195.; theLowEData.push_back(it);
|
|
it.first=1301.86; it.second= 73.8; theLowEData.push_back(it);
|
|
it.first=1368.93; it.second= 35.0; theLowEData.push_back(it);
|
|
it.first=1433.81; it.second= 22.0; theLowEData.push_back(it);
|
|
it.first=1496.42; it.second= 15.0; theLowEData.push_back(it);
|
|
it.first=1556.84; it.second= 15.2; theLowEData.push_back(it);
|
|
it.first=1615.21; it.second= 19.4; theLowEData.push_back(it);
|
|
it.first=1671.7; it.second= 25.; theLowEData.push_back(it);
|
|
it.first=1726.44; it.second= 26.; theLowEData.push_back(it);
|
|
it.first=1779.57; it.second= 30.; theLowEData.push_back(it);
|
|
it.first=1881.49; it.second= 40.; theLowEData.push_back(it);
|
|
it.first=1930.49; it.second= 40.; theLowEData.push_back(it);
|
|
it.first=2070.69; it.second= 30.; theLowEData.push_back(it);
|
|
it.first=2202.11; it.second= 29.; theLowEData.push_back(it);
|
|
it.first=2326.19; it.second= 30.7; theLowEData.push_back(it);
|
|
it.first=2405.38; it.second= 30.7; theLowEData.push_back(it);
|
|
it.first=2733.67; it.second= 28.3; theLowEData.push_back(it);
|
|
it.first=3207.21; it.second= 26.5; theLowEData.push_back(it);
|
|
it.first=4434.76; it.second= 25.0; theLowEData.push_back(it);
|
|
}
|
|
|
|
G4double G4XpipNTotal::
|
|
CrossSection(const G4KineticTrack& trk1, const G4KineticTrack& trk2) const
|
|
{
|
|
G4double sqrts = (trk1.Get4Momentum() + trk2.Get4Momentum()).mag();
|
|
if(sqrts > theLowEData.back().first/MeV) return thePDGData.CrossSection(trk1, trk2);
|
|
G4double result = 0;
|
|
size_t i(0), it(0);
|
|
if(sqrts<theLowEData[0].first) return 0;
|
|
for(i=0; i<theLowEData.size(); i++)
|
|
{
|
|
if(theLowEData[i].first/MeV>sqrts) break;
|
|
it = i;
|
|
}
|
|
G4double x1 = G4Log(theLowEData[it].first);
|
|
G4double x2 = G4Log(theLowEData[it+1].first);
|
|
G4double y1 = G4Log(theLowEData[it].second);
|
|
G4double y2 = G4Log(theLowEData[it+1].second);
|
|
G4double x = G4Log(sqrts);
|
|
G4double y = y1+(x-x1)*(y2-y1)/(x2-x1);
|
|
result = G4Exp(y);
|
|
return result*millibarn;
|
|
}
|