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MyMaterials.cc
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25 //
26 // ====================================================================
27 // MyMaterials.cc
28 //
29 // 2005 Q
30 // ====================================================================
31 #include "MyMaterials.hh"
32 #include "G4Material.hh"
33 #include "G4SystemOfUnits.hh"
34 #include "G4PhysicalConstants.hh"
35 
36 // ====================================================================
37 //
38 // class description
39 //
40 // ====================================================================
41 
43 MyMaterials::MyMaterials()
45 {
46 }
47 
48 
50 MyMaterials::~MyMaterials()
52 {
53 }
54 
55 
57 void MyMaterials::Construct()
59 {
60  G4double A, Z;
61 
62  // ------------------------------------------------------------------------
63  // Elements
64  // ------------------------------------------------------------------------
65  G4Element* elH = new G4Element("Hydrogen","H", Z=1., A=1.00794*g/mole);
66  G4Element* elC = new G4Element("Carbon", "C", Z=6., A= 12.011 *g/mole);
67  G4Element* elN = new G4Element("Nitrogen","N", Z=7., A= 14.00674*g/mole);
68  G4Element* elO = new G4Element("Oxygen", "O", Z=8., A= 15.9994*g/mole);
69 
70  // ------------------------------------------------------------------------
71  // Materials
72  // ------------------------------------------------------------------------
73  G4double density, massfraction;
74  G4int natoms, nel;
75 
76  // temperature of experimental hall is controlled at 20 degree.
77  const G4double expTemp= STP_Temperature+20.*kelvin;
78 
79  // vacuum
80  density= universe_mean_density;
81  G4Material* Vacuum= new G4Material("Vacuum", density, nel=2);
82  Vacuum-> AddElement(elN, .7);
83  Vacuum-> AddElement(elO, .3);
84 
85  // air
86  density= 1.2929e-03 *g/cm3; // at 20 degree
87  G4Material* Air= new G4Material("Air", density, nel=2,
88  kStateGas, expTemp);
89  G4double ttt= 75.47+23.20;
90  Air-> AddElement(elN, massfraction= 75.47/ttt);
91  Air-> AddElement(elO, massfraction= 23.20/ttt);
92 
93  // water
94  density= 1.000*g/cm3;
95  G4Material* H2O= new G4Material("Water", density, nel=2);
96  H2O-> AddElement(elH, natoms=2);
97  H2O-> AddElement(elO, natoms=1);
98 
99  // alminium
100  A= 26.98 *g/mole;
101  density= 2.70 *g/cm3;
102  G4Material* Al= new G4Material("Al", Z=13., A, density);
103 
104  // iron
105  A= 55.847 *g/mole;
106  density= 7.87 *g/cm3;
107  G4Material* Fe= new G4Material("Iron", Z=26., A, density);
108 
109  // lead
110  A= 207.2 *g/mole;
111  density= 11.35 *g/cm3;
112  G4Material* Pb= new G4Material("Lead", Z=82., A, density);
113 
114  // scintillator (Polystyene(C6H5CH=CH2))
115  density= 1.032 *g/cm3;
116  G4Material* Scinti= new G4Material("Scinti", density, nel=2);
117  Scinti-> AddElement(elC, natoms=8);
118  Scinti-> AddElement(elH, natoms=8);
119 
120 }
121