1 | // |
---|
2 | // ******************************************************************** |
---|
3 | // * License and Disclaimer * |
---|
4 | // * * |
---|
5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
7 | // * conditions of the Geant4 Software License, included in the file * |
---|
8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
9 | // * include a list of copyright holders. * |
---|
10 | // * * |
---|
11 | // * Neither the authors of this software system, nor their employing * |
---|
12 | // * institutes,nor the agencies providing financial support for this * |
---|
13 | // * work make any representation or warranty, express or implied, * |
---|
14 | // * regarding this software system or assume any liability for its * |
---|
15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
16 | // * for the full disclaimer and the limitation of liability. * |
---|
17 | // * * |
---|
18 | // * This code implementation is the result of the scientific and * |
---|
19 | // * technical work of the GEANT4 collaboration. * |
---|
20 | // * By using, copying, modifying or distributing the software (or * |
---|
21 | // * any work based on the software) you agree to acknowledge its * |
---|
22 | // * use in resulting scientific publications, and indicate your * |
---|
23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
24 | // ******************************************************************** |
---|
25 | // |
---|
26 | // |
---|
27 | // |
---|
28 | //$Id: G4GeneralPhaseSpaceDecay.hh,v 1.1 1997/05/21 |
---|
29 | // ---------------------------------------------------------------- |
---|
30 | // GEANT 4 class header file |
---|
31 | // |
---|
32 | // History: first implementation, A. Feliciello, 20th May 1998 |
---|
33 | // |
---|
34 | // Note: this class is a generalization of the |
---|
35 | // G4PhaseSpaceDecayChannel one |
---|
36 | // ---------------------------------------------------------------- |
---|
37 | #ifndef G4GeneralPhaseSpaceDecay_h |
---|
38 | #define G4GeneralPhaseSpaceDecay_h 1 |
---|
39 | |
---|
40 | #include "G4ios.hh" |
---|
41 | #include "globals.hh" |
---|
42 | #include "G4VDecayChannel.hh" |
---|
43 | #include "G4HadronicException.hh" |
---|
44 | |
---|
45 | class G4GeneralPhaseSpaceDecay : public G4VDecayChannel |
---|
46 | { |
---|
47 | public: |
---|
48 | //Constructors |
---|
49 | G4GeneralPhaseSpaceDecay(G4int Verbose = 1); |
---|
50 | |
---|
51 | G4GeneralPhaseSpaceDecay(const G4String& theParentName, |
---|
52 | G4double theBR, |
---|
53 | G4int theNumberOfDaughters, |
---|
54 | const G4String& theDaughterName1, |
---|
55 | const G4String& theDaughterName2 = "", |
---|
56 | const G4String& theDaughterName3 = ""); |
---|
57 | |
---|
58 | G4GeneralPhaseSpaceDecay(const G4String& theParentName, |
---|
59 | G4double theParentMass, |
---|
60 | G4double theBR, |
---|
61 | G4int theNumberOfDaughters, |
---|
62 | const G4String& theDaughterName1, |
---|
63 | const G4String& theDaughterName2 = "", |
---|
64 | const G4String& theDaughterName3 = ""); |
---|
65 | |
---|
66 | G4GeneralPhaseSpaceDecay(const G4String& theParentName, |
---|
67 | G4double theParentMass, |
---|
68 | G4double theBR, |
---|
69 | G4int theNumberOfDaughters, |
---|
70 | const G4String& theDaughterName1, |
---|
71 | const G4String& theDaughterName2 , |
---|
72 | const G4String& theDaughterName3 , |
---|
73 | const G4double * masses); |
---|
74 | |
---|
75 | // Destructor |
---|
76 | virtual ~G4GeneralPhaseSpaceDecay(); |
---|
77 | |
---|
78 | public: |
---|
79 | G4double GetParentMass() const; |
---|
80 | void SetParentMass(const G4double aParentMass); |
---|
81 | virtual G4DecayProducts* DecayIt(G4double mass=0.0); |
---|
82 | static G4double Pmx(G4double e, G4double p1, G4double p2); |
---|
83 | |
---|
84 | protected: |
---|
85 | G4DecayProducts* OneBodyDecayIt(); |
---|
86 | G4DecayProducts* TwoBodyDecayIt(); |
---|
87 | G4DecayProducts* ThreeBodyDecayIt(); |
---|
88 | G4DecayProducts* ManyBodyDecayIt(); |
---|
89 | |
---|
90 | private: |
---|
91 | G4double parentmass; |
---|
92 | const G4double * theDaughterMasses; |
---|
93 | |
---|
94 | }; |
---|
95 | |
---|
96 | |
---|
97 | |
---|
98 | inline G4double G4GeneralPhaseSpaceDecay::GetParentMass() const |
---|
99 | { |
---|
100 | return parentmass; |
---|
101 | } |
---|
102 | |
---|
103 | inline void G4GeneralPhaseSpaceDecay::SetParentMass(const G4double aParentMass) |
---|
104 | { |
---|
105 | parentmass = aParentMass; |
---|
106 | } |
---|
107 | |
---|
108 | |
---|
109 | |
---|
110 | inline |
---|
111 | G4double G4GeneralPhaseSpaceDecay::Pmx(G4double e, G4double p1, G4double p2) |
---|
112 | { |
---|
113 | // calculate momentum of daughter particles in two-body decay |
---|
114 | if (e-p1-p2 < 0 ) |
---|
115 | { |
---|
116 | G4HadronicException(__FILE__, __LINE__, "G4GeneralPhaseSpaceDecay::Pmx energy in cms > mass1+mass2"); |
---|
117 | } |
---|
118 | G4double ppp = (e+p1+p2)*(e+p1-p2)*(e-p1+p2)*(e-p1-p2)/(4.0*e*e); |
---|
119 | if (ppp>0) return std::sqrt(ppp); |
---|
120 | else return -1.; |
---|
121 | } |
---|
122 | |
---|
123 | #endif |
---|