NeutronAnalysis.C

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int NeutronAnalysis()
{

  // -----  Load libraries   ------------------------------------------------
//``gSystem->Load("fstream.h");
   gROOT->Macro("$VMCWORKDIR/gconfig/rootlogon.C");


   gSystem->Load("libHypGe");

  // -----   Timer   --------------------------------------------------------
  TStopwatch timer;
  timer.Start();
  // ------------------------------------------------------------------------

        TString Filename = "$SIMDATADIR/TripleBall40Offset10_urqmd_pbarC_1_5000Evts.root";


//Output Files
        //TString Path = getenv("SIMDATADIR");
        TString outfile= "$SIMDATADIR/Data_Marcell/TripleBall40Offset10_urqmd_pbarC_1_5000Evts_spectrum.root";//"$SIMDATADIR/Data_Marcell/TripleBall40Offset10_urqmd_pbarC_1_5000Evts_spectrum.root";
        TFile* g = new TFile(Filename);
        TFile* fi = new TFile(outfile,"RECREATE");



   //photons from hyp electromag. decay
  TTree *b=(TTree *) g->Get("pndsim") ;
  TClonesArray* hit_bar=new TClonesArray("PndHypGePoint");
  b->SetBranchAddress("HypGePoint",&hit_bar);//Branch names
  TClonesArray* mc_bar=new TClonesArray("PndMCTrack");
  b->SetBranchAddress("MCTrack",&mc_bar);//Branch names




  //****photons from hyp elect. decay

        string Name = "Neutrons hitting the germaniums";
        TH1D* gamTde = new TH1D("gamTde",Name.c_str(),150, 150,180);
        TH1D* hCrystalHit = new TH1D("hCrystalHit","Crystals hit by neutrons",1700,1,1700);


        bool verbose = false;
        Int_t MotherId,Motherpdg;

        TH1D *hNoHits = new TH1D("Number of Hits", "Number of Hits", 16,0,15);

        TVector3 vecs,pos;
        int mcpdg = -1,ev;
        Double_t mult,En,Eng,Enth;

        //vector<int> event;
        int count;
        Int_t nEvents = b->GetEntriesFast();
        cout<< "Number of Simulated Events: "<<nEvents<<endl;


        Double_t Resolution = 2.;       //keV
        for (Int_t k=0; k<nEvents; k++)
        {
                        //cout << k << endl;
                Eng=0.;
                b->GetEntry(k);
                if (!((k*100)% nEvents))
                {
                        cout << k << endl;
                }
            //if(verbose) cout<<"Event No "<<j<<endl;
                for (Int_t i=0; i<hit_bar->GetEntriesFast(); i++)
                {
                        //cout << hit_bar->GetEntriesFast()<<endl;
                        PndHypGePoint *hitgam=(PndHypGePoint*)hit_bar->At(i);

                        //PndMCTrack *mcgam = (PndMCTrack*)mc_bar->At(hitgam->GetTrackID());


                        //rande= gRandom->Gaus(hitgam->GetEnergyLoss(),0.000003);
                        if (hitgam->GetpdgCode()==2112)
                        {
                                gamTde->Fill(180/TMath::Pi()*TMath::ACos(hitgam->GetPz()/TMath::Sqrt(hitgam->GetPx()*hitgam->GetPx()+hitgam->GetPy()*hitgam->GetPy()+hitgam->GetPz()* hitgam->GetPz())));               //Fill spectrum
                                hCrystalHit->Fill(hitgam->GetDetectorID());
                        }
                }


          }// end for j (events)

  gamTde->Write();
        hCrystalHit->Write();

  gamTde->Draw();
  TCanvas* c2 = new TCanvas("c2","c2",800,600);
  c2->cd();
  hCrystalHit->Draw();
  //Analysis of spectrum

        fi->Close();




        // -----   Finish   -------------------------------------------------------
        timer.Stop();
        Double_t rtime = timer.RealTime();
        Double_t ctime = timer.CpuTime();
        cout << endl << endl;
        cout << "Macro finished succesfully." << endl;

        cout << "Real time " << rtime << " s, CPU time " << ctime << " s" << endl;
        cout << endl;
        // ------------------------------------------------------------------------

  return 0;
}