{
c1 = new TCanvas("c1","c1 title",200,100,400,300);
h1 = new TH1F("h1","h1 title",100,0., 500.); 
//
for (int i = 0; i<50000; i++){
   double x = gRandom.Gaus(0.,3.);
   h1->Fill(gRandom->Landau(72., 11.8));
}
//
h1->SetXTitle("numder of eh pairs / #mum in Silicon");
h1->Draw();
c1->Print("Landau.png");
}