how to change the cross section data

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how to change the cross section data

Hello ,everyone!
  I'm sorry for my poor English first!
  I'm studying neutron interract with Si in a small geometry,the cross section of hadronic
interaction are too small.It cost me too much time .
  I want to change the cross section of haronic interation, Is there anybody who has enhanced the cross section of  hadronic interaction ?
   I'm appreciated for your help!
  A part of my codes are showed bellow:
 G4ProcessManager* pmanager = G4Neutron::Neutron()->GetProcessManager();

   // add process 
  G4HadronElasticProcess* thenElasticProcess                               
                         = new G4HadronElasticProcess(); 
   thenElasticProcess->AddDataSet(new G4HadronElasticDataSet);

   G4LElastic* thenElasticModel = new G4LElastic(); 
   thenElasticModel->SetMinEnergy(20.*MeV); 
   G4NeutronHPElastic* theNeutronHPElasticModel= new G4NeutronHPElastic(); 
   theNeutronHPElasticModel ->SetMaxEnergy(20.*MeV); 
   thenElasticProcess->RegisterMe(thenElasticModel); 
   thenElasticProcess->RegisterMe(theNeutronHPElasticModel);

   pmanager->AddDiscreteProcess(thenElasticProcess);

Re: how to change the cross section data by Vladimir Ivanchenko <Vladimir Ivanchenko>, Jun 03, 10:32 Re: how to change the cross section data (keyuan) Hello, If one brutally change cross section than the number of interactions in the target will increased but one has to be very careful, because results may be totally wrong. I would instead propose to use G4 user actions and kill unwanted primary particles and/or events. VI

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