Gabriele Cosmo
60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
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{
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gROOT->Reset();
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// Draw histograms fill by Geant4 TestEm11 simulation
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TFile f1("./19um-local.root");
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TH1D* h1 = (TH1D*) f1.Get("h12");
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h1->SetTitle("Angular distribution of 15.7 MeV e- after 19um Au foil");
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//h1->SetTitle("Angular distribution of 15.7 MeV e- after 9um Au foil");
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h1->GetXaxis()->SetTitle("theta (deg)");
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h1->GetYaxis()->SetTitle("dN/dOmega");
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h1->SetStats(kFALSE); // Eliminate statistics box
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h1->SetLineColor(kOrange);
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h1->Draw("HIST");
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TFile f2("./19um-opt3.root");
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TH1D* h2 = (TH1D*) f2.Get("h12");
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h2->SetStats(kFALSE); // Eliminate statistics box
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h2->SetLineColor(kBlue);
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h2->Draw("SAME HIST");
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TFile f3("./19um-opt4.root");
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TH1D* h3 = (TH1D*) f3.Get("h12");
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h3->SetStats(kFALSE); // Eliminate statistics box
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h3->SetLineColor(kGreen);
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h3->Draw("SAME HIST");
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/* data
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* angle distribution of 15.7 MeV electrons
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* transmitted through thin gold foils.
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* A.O.Hanson et al. Phys.Rev.84 (1951) page 634.
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*/
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ifstream in;
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in.open("./19um-wwols.ascii");
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//in.open("./9um-wwols.ascii");
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TMarker *pt;
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Double_t x, y;
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// First indicate number of data
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int nbdata = 0;
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in >> nbdata;
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for ( int i = 0 ; i < nbdata ; i++ ) {
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in >> x >> y ;
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if (!in.good()) break;
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pt = new TMarker(x,y,23); // 23 for triangle-down TMarker
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pt->SetMarkerColor(kMagenta);
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pt->Draw();
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}
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in.close();
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// Print the histograms legend
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TLegend* legend = new TLegend(0.6,0.5,0.8,0.68);
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legend->AddEntry(h1,"local ","l");
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legend->AddEntry(h2,"opt3 ","l");
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legend->AddEntry(h3,"opt4","l");
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legend->AddEntry(pt,"Hanson data","P");
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legend->Draw();
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}
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