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G4PreCompoundAlpha.cc
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26 // $Id: G4PreCompoundAlpha.cc 90337 2015-05-26 08:34:27Z gcosmo $
27 //
28 // -------------------------------------------------------------------
29 //
30 // GEANT4 Class file
31 //
32 //
33 // File name: G4PreCompoundAlpha
34 //
35 // Author: V.Lara
36 //
37 // Modified:
38 // 21.08.2008 J. M. Quesada add choice of options
39 // 20.08.2010 V.Ivanchenko added G4Pow and G4PreCompoundParameters pointers
40 // use int Z and A and cleanup
41 // 05.07.2013 J.M. Quesada FactorialFactor fixed
42 //
43 
44 #include "G4PreCompoundAlpha.hh"
45 #include "G4SystemOfUnits.hh"
46 #include "G4Alpha.hh"
47 
49  : G4PreCompoundIon(G4Alpha::Alpha(), &theAlphaCoulombBarrier)
50 {}
51 
53 {}
54 
56 {
57  return G4double((N-4)*(P-3)*(N-3)*(P-2))*G4double((N-2)*(P-1)*(N-1)*P)/144.0;
58 }
59 
61 {
62  return 4096.0/G4double(A*A*A);
63 }
64 
66 {
67  G4double C = 0.0;
68  if (theFragZ <= 30)
69  {
70  C = 0.10;
71  }
72  else if (theFragZ <= 50)
73  {
74  C = 0.1 - (theFragZ-30)*0.001;
75  }
76  else if (theFragZ < 70)
77  {
78  C = 0.08 - (theFragZ-50)*0.001;
79  }
80  else
81  {
82  C = 0.06;
83  }
84  return 1.0+C;
85 }
86 
87 G4double G4PreCompoundAlpha::GetRj(G4int nParticles, G4int nCharged) const
88 {
89  G4double rj = 0.0;
90  if(nCharged >=2 && (nParticles-nCharged) >=2 ) {
91  G4double denominator =
92  G4double(nParticles*(nParticles-1)*(nParticles-2)*(nParticles-3));
93  rj = 6.0*nCharged*(nCharged-1)*(nParticles-nCharged)*(nParticles-nCharged-1)
94  /denominator;
95  }
96  return rj;
97 }
98 
virtual G4double GetAlpha() const
virtual G4double FactorialFactor(G4int N, G4int P) const
double G4double
Definition: G4Types.hh:76
**D E S C R I P T I O N
double A(double temperature)
virtual G4double GetRj(G4int NumberParticles, G4int NumberCharged) const
static double P[]
int G4int
Definition: G4Types.hh:78
double C(double temp)
virtual G4double CoalescenceFactor(G4int A) const