| Geant4 Cross Reference |
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25 // 25 //
26 #include <cmath> 26 #include <cmath>
27 #include "G4Exp.hh" 27 #include "G4Exp.hh"
28 #include "G4Log.hh" 28 #include "G4Log.hh"
29 #include "G4XpipNTotal.hh" 29 #include "G4XpipNTotal.hh"
30 #include "G4SystemOfUnits.hh" 30 #include "G4SystemOfUnits.hh"
31 31
32 G4XpipNTotal:: 32 G4XpipNTotal::
33 G4XpipNTotal() 33 G4XpipNTotal()
34 { 34 {
35 std::pair<double,double> it; 35 std::pair<double,double> it;
36 it.first=1105.46; it.second= 6.4; theLowED 36 it.first=1105.46; it.second= 6.4; theLowEData.push_back(it);
37 it.first=1133.28; it.second= 18.0; theLowED 37 it.first=1133.28; it.second= 18.0; theLowEData.push_back(it);
38 it.first=1165.12; it.second= 66.0; theLowED 38 it.first=1165.12; it.second= 66.0; theLowEData.push_back(it);
39 it.first=1198.8; it.second= 160.; theLowED 39 it.first=1198.8; it.second= 160.; theLowEData.push_back(it);
40 it.first=1212.51; it.second= 199.; theLowED 40 it.first=1212.51; it.second= 199.; theLowEData.push_back(it);
41 it.first=1233.18; it.second= 195.; theLowED 41 it.first=1233.18; it.second= 195.; theLowEData.push_back(it);
42 it.first=1301.86; it.second= 73.8; theLowED 42 it.first=1301.86; it.second= 73.8; theLowEData.push_back(it);
43 it.first=1368.93; it.second= 35.0; theLowED 43 it.first=1368.93; it.second= 35.0; theLowEData.push_back(it);
44 it.first=1433.81; it.second= 22.0; theLowED 44 it.first=1433.81; it.second= 22.0; theLowEData.push_back(it);
45 it.first=1496.42; it.second= 15.0; theLowED 45 it.first=1496.42; it.second= 15.0; theLowEData.push_back(it);
46 it.first=1556.84; it.second= 15.2; theLowED 46 it.first=1556.84; it.second= 15.2; theLowEData.push_back(it);
47 it.first=1615.21; it.second= 19.4; theLowED 47 it.first=1615.21; it.second= 19.4; theLowEData.push_back(it);
48 it.first=1671.7; it.second= 25.; theLowED 48 it.first=1671.7; it.second= 25.; theLowEData.push_back(it);
49 it.first=1726.44; it.second= 26.; theLowED 49 it.first=1726.44; it.second= 26.; theLowEData.push_back(it);
50 it.first=1779.57; it.second= 30.; theLowED 50 it.first=1779.57; it.second= 30.; theLowEData.push_back(it);
51 it.first=1881.49; it.second= 40.; theLowED 51 it.first=1881.49; it.second= 40.; theLowEData.push_back(it);
52 it.first=1930.49; it.second= 40.; theLowED 52 it.first=1930.49; it.second= 40.; theLowEData.push_back(it);
53 it.first=2070.69; it.second= 30.; theLowED 53 it.first=2070.69; it.second= 30.; theLowEData.push_back(it);
54 it.first=2202.11; it.second= 29.; theLowED 54 it.first=2202.11; it.second= 29.; theLowEData.push_back(it);
55 it.first=2326.19; it.second= 30.7; theLowED 55 it.first=2326.19; it.second= 30.7; theLowEData.push_back(it);
56 it.first=2405.38; it.second= 30.7; theLowED 56 it.first=2405.38; it.second= 30.7; theLowEData.push_back(it);
57 it.first=2733.67; it.second= 28.3; theLowED 57 it.first=2733.67; it.second= 28.3; theLowEData.push_back(it);
58 it.first=3207.21; it.second= 26.5; theLowED 58 it.first=3207.21; it.second= 26.5; theLowEData.push_back(it);
59 it.first=4434.76; it.second= 25.0; theLowED 59 it.first=4434.76; it.second= 25.0; theLowEData.push_back(it);
60 } 60 }
61 61
62 G4double G4XpipNTotal:: 62 G4double G4XpipNTotal::
63 CrossSection(const G4KineticTrack& trk1, cons 63 CrossSection(const G4KineticTrack& trk1, const G4KineticTrack& trk2) const
64 { 64 {
65 G4double sqrts = (trk1.Get4Momentum() + trk 65 G4double sqrts = (trk1.Get4Momentum() + trk2.Get4Momentum()).mag();
66 if(sqrts > theLowEData.back().first/MeV) re 66 if(sqrts > theLowEData.back().first/MeV) return thePDGData.CrossSection(trk1, trk2);
67 G4double result = 0; 67 G4double result = 0;
68 size_t i(0), it(0); 68 size_t i(0), it(0);
69 if(sqrts<theLowEData[0].first) return 0; 69 if(sqrts<theLowEData[0].first) return 0;
70 for(i=0; i<theLowEData.size(); i++) 70 for(i=0; i<theLowEData.size(); i++)
71 { 71 {
72 if(theLowEData[i].first/MeV>sqrts) break; 72 if(theLowEData[i].first/MeV>sqrts) break;
73 it = i; 73 it = i;
74 } 74 }
75 G4double x1 = G4Log(theLowEData[it].first); 75 G4double x1 = G4Log(theLowEData[it].first);
76 G4double x2 = G4Log(theLowEData[it+1].first 76 G4double x2 = G4Log(theLowEData[it+1].first);
77 G4double y1 = G4Log(theLowEData[it].second) 77 G4double y1 = G4Log(theLowEData[it].second);
78 G4double y2 = G4Log(theLowEData[it+1].secon 78 G4double y2 = G4Log(theLowEData[it+1].second);
79 G4double x = G4Log(sqrts); 79 G4double x = G4Log(sqrts);
80 G4double y = y1+(x-x1)*(y2-y1)/(x2-x1); 80 G4double y = y1+(x-x1)*(y2-y1)/(x2-x1);
81 result = G4Exp(y); 81 result = G4Exp(y);
82 return result*millibarn; 82 return result*millibarn;
83 } 83 }
84 84