Geant4
11.2.2
Toolkit for the simulation of the passage of particles through matter
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G4LowEXsection.cc
Go to the documentation of this file.
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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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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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#include <cmath>
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#include "
G4Exp.hh
"
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#include "
G4Log.hh
"
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#include "
G4LowEXsection.hh
"
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#include "
G4SystemOfUnits.hh
"
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G4double
G4LowEXsection::
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CrossSection
(
G4double
aX)
const
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{
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G4double
result = 0;
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if
(aX<front().first)
return
0;
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G4LowEXsection::const_iterator i;
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G4LowEXsection::const_iterator it=end();
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for
(i=begin(); i!=end(); i++)
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{
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if
((*i).first/MeV>aX)
break
;
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it = i;
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}
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G4double
x1 =
G4Log
((*it).first);
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G4double
x2 =
G4Log
((*(it+1)).first);
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G4double
y1 =
G4Log
((*it).second);
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G4double
y2 =
G4Log
((*(it+1)).second);
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G4double
x =
G4Log
(aX);
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G4double
y = y1+(x-x1)*(y2-y1)/(x2-x1);
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result =
G4Exp
(y);
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return
result*millibarn;
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}
G4Exp.hh
G4Exp
G4double G4Exp(G4double initial_x)
Exponential Function double precision.
Definition
G4Exp.hh:180
G4Log.hh
G4Log
G4double G4Log(G4double x)
Definition
G4Log.hh:227
G4LowEXsection.hh
G4SystemOfUnits.hh
G4double
double G4double
Definition
G4Types.hh:83
G4LowEXsection::CrossSection
G4double CrossSection(G4double s) const
Definition
G4LowEXsection.cc:34
geant4-v11.2.2
source
processes
hadronic
models
im_r_matrix
src
G4LowEXsection.cc
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