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G4CollisionNN.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file G4CollisionNN.cc
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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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// * use in resulting scientific publications, and indicate your *
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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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//
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#include "
globals.hh
"
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#include "
G4CollisionNN.hh
"
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#include "
G4CollisionComposite.hh
"
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#include "
G4VCollision.hh
"
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#include "
G4CollisionVector.hh
"
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#include "
G4KineticTrack.hh
"
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#include "
G4VCrossSectionSource.hh
"
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#include "
G4XNNTotal.hh
"
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#include "
G4Proton.hh
"
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#include "
G4Neutron.hh
"
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#include "
G4CollisionNNElastic.hh
"
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#include "
G4CollisionnpElastic.hh
"
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#include "
G4CollisionNNToNDelta.hh
"
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#include "
G4CollisionNNToDeltaDelta.hh
"
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#include "
G4CollisionNNToNDeltastar.hh
"
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#include "
G4CollisionNNToDeltaDeltastar.hh
"
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#include "
G4CollisionNNToNNstar.hh
"
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#include "
G4CollisionNNToDeltaNstar.hh
"
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#include "
G4Pair.hh
"
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typedef
GROUP8
(
G4CollisionnpElastic
,
G4CollisionNNElastic
,
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G4CollisionNNToNDelta
,
G4CollisionNNToDeltaDelta
,
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G4CollisionNNToNDeltastar
,
G4CollisionNNToDeltaDeltastar
,
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G4CollisionNNToNNstar
,
G4CollisionNNToDeltaNstar
) theChannels;
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G4CollisionNN
::
G4CollisionNN
()
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{
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components
=0;
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crossSectionSource =
new
G4XNNTotal
();
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G4CollisionComposite::Register
aR;
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G4ForEach<theChannels>::Apply
(&aR,
this
);
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}
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G4CollisionNN::~G4CollisionNN
()
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{
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if
(
components
) {
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delete
components
;
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components
=0;
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}
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delete
crossSectionSource
;
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crossSectionSource
= 0;
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}
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const
std::vector<G4String>&
G4CollisionNN::GetListOfColliders
(
G4int
)
const
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{
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throw
G4HadronicException
(__FILE__, __LINE__,
"G4CollisionNN::GetListOfColliders - Argument outside valid range"
);
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return
colliders1
;
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}
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G4double
G4CollisionNN::CrossSection
(
const
G4KineticTrack
& aTrk1,
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const
G4KineticTrack
& aTrk2)
const
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{
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G4double
sigma = 0.;
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// nucleon-nucleon cross-sections made for on-shell particles.
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// here we take the kinetic energy as the quantity relevant
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// for calculating the scattering cross-sections for off-shell hadrons
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const
G4VCrossSectionSource
* xSource =
GetCrossSectionSource
();
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G4LorentzVector
p1 = aTrk1.
Get4Momentum
();
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G4LorentzVector
p2 = aTrk2.
Get4Momentum
();
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G4double
t1
= p1.
e
()-aTrk1.
GetActualMass
();
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G4double
t2
= p2.
e
()-aTrk2.
GetActualMass
();
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p1.
setE
(t1+aTrk1.
GetDefinition
()->
GetPDGMass
());
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p2.
setE
(t2+aTrk2.
GetDefinition
()->
GetPDGMass
());
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G4KineticTrack
trk1(aTrk1);
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trk1.
Set4Momentum
(p1);
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G4KineticTrack
trk2(aTrk2);
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trk2.
Set4Momentum
(p2);
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if
( (p1+p2).mag()<aTrk1.
GetDefinition
()->
GetPDGMass
()+aTrk2.
GetDefinition
()->
GetPDGMass
())
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{
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return
0.;
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}
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if
(xSource != 0)
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{
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// There is a cross section for this Collision
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sigma = xSource->
CrossSection
(trk1,trk2);
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}
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return
sigma;
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}
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geant4
tree
geant4-10.6-release
source
processes
hadronic
models
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src
G4CollisionNN.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:43
using
1.8.2 with
ECCE GitHub integration