--- /dev/null
+void Fragment(Int_t nev=0, Int_t debug=0)
+{
+ gROOT->Reset();
+ gStyle->SetPalette(1);
+ gStyle->SetCanvasColor(33);
+ gStyle->SetFrameFillColor(38);
+
+ Float_t b;
+ Int_t nspectp, nspectn, nspectpfree, nspectnfree;
+ Int_t zz[100], nn[100], nalpha, ztot, ntot;
+ void spectator(Float_t, Int_t*, Int_t*);
+
+ TH2F *hsp = new TH2F("hsp","Spectator protons vs b",100,0.,20.,100,0.,150.);
+ hsp -> SetXTitle("b (fm)");
+ hsp -> SetYTitle("Num. of spectator protons");
+
+ TH2F *hsn = new TH2F("hsn","Spectator neutrons vs b",100,0.,20.,100,0.,150.);
+ hsn -> SetXTitle("b (fm)");
+ hsn -> SetYTitle("Num. of spectator neutrons");
+
+ TH2F *hFragp = new TH2F("hFragp","Free spectator protons vs b",100,0.,20.,100,0.,150.);
+ hFragp -> SetXTitle("b (fm)");
+ hFragp -> SetYTitle("Num. of free spectator protons");
+
+ TH2F *hFragn = new TH2F("hFragn","Free spectator neutrons vs b",100,0.,20.,100,0.,150.);
+ hFragn -> SetXTitle("b (fm)");
+ hFragn -> SetYTitle("Num. of free spectator neutrons");
+
+ TF1 *funb = new TF1("funb","x",0,15);
+ for(Int_t ievent=0; ievent<nev; ievent++){
+ if(ievent%1000==0){printf("Processing event %d\n",ievent);}
+ b= Float_t(funb->GetRandom());
+ spectator(b, &nspectp, &nspectn);
+ hsp -> Fill(b,nspectp);
+ hsn -> Fill(b,nspectn);
+ AliZDCFragment *gallio = new AliZDCFragment(b);
+ for(Int_t j=0; j<=99; j++){
+ zz[j] =0;
+ nn[j] =0;
+ }
+//
+// Generation of fragments
+ gallio->GenerateIMF(zz, nalpha);
+ Int_t NFrag = gallio->GetFragmentNum();
+//
+// Attach neutrons
+ ztot=0;
+ ntot=0;
+ gallio->AttachNeutrons(zz, nn, ztot, ntot);
+ nspectpfree = nspectp-ztot-2*nalpha;
+ nspectnfree = nspectn-ntot-2*nalpha;
+ hFragp -> Fill(b,nspectpfree);
+ hFragn -> Fill(b,nspectnfree);
+//
+// Print
+ if(debug == 1){
+ printf("\n b = %f\n",b);
+ printf("\n #spect p = %d, #spect n = %d\n",nspectp,nspectn);
+ printf("\n #spect p free = %d, #spect n free = %d\n",nspectpfree,nspectnfree);
+ printf("\n #fragments = %f\n",NFrag);
+ for(Int_t i=0; i<NFrag; i++){
+ printf("\n ZZ[%d] = %d, NN[%d] = %d\n",i,zz[i],i,nn[i]);
+ }
+ printf("\n NAlpha = %d, Ztot = %d, Ntot = %d\n\n",nalpha,ztot,ntot);
+ }
+ delete gallio;
+ } //Event loop
+
+ TCanvas *c1 = new TCanvas("c1","Fragmentation",0,10,580,700);
+ c1->cd();
+ c1->SetFillColor(29);
+ c1->Divide(2,2);
+ c1->cd(1);
+ hsp -> Draw("box");
+ c1->cd(2);
+ hsn -> Draw("box");
+ c1->cd(3);
+ hFragp -> Draw("box");
+ c1->cd(4);
+ hFragn -> Draw("box");
+
+}
+
+
+void spectator(Float_t b, Int_t* NSpectp, Int_t* NSpectn)
+{
+ Float_t SppvsB[6] = {3.633,-1.518,1.360,-.4899e-1,-.2398e-2,.1066e-3};
+ Float_t SpnvsB[6] = {5.639,-1.685,1.803,-.3129e-1,-.6618e-2,.2352e-3};
+ Float_t Sigmap[4] = {.5668,-.2200e-1,.3657e-3,-.2201e-5};
+ Float_t Sigman[4] = {.4185,-.9798e-2,.1052e-3,-.4238e-6};
+
+ Float_t rnsp = SppvsB[0]+SppvsB[1]*b+SppvsB[2]*(b*b)+SppvsB[3]*(b*b*b)+
+ SppvsB[4]*(b*b*b*b)+SppvsB[5]*(b*b*b*b*b);
+ Float_t rnsn = SpnvsB[0]+SpnvsB[1]*b+SpnvsB[2]*(b*b)+SpnvsB[3]*(b*b*b)+
+ SpnvsB[4]*(b*b*b*b)+SpnvsB[5]*(b*b*b*b*b);
+ Float_t snsp = Sigmap[0]+Sigmap[1]*rnsp+Sigmap[2]*(rnsp*rnsp)+Sigmap[3]*
+ (rnsp*rnsp*rnsp);
+ Float_t snsn = Sigman[0]+Sigman[1]*rnsn+Sigman[2]*(rnsn*rnsn)+Sigman[3]*
+ (rnsn*rnsn*rnsn);
+
+ snsp = snsp*rnsp;
+ snsn = snsn*rnsn;
+
+ Float_t xgaup = gRandom->Gaus(0.0,1.0);
+ snsp = snsp*xgaup;
+ Float_t xgaun = gRandom->Gaus(0.0,1.0);
+ snsn = snsn*xgaun;
+ rnsp=rnsp+snsp;
+ rnsn=rnsn+snsn;
+
+ *NSpectp = Int_t(rnsp);
+ *NSpectn = Int_t(rnsn);
+
+}