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26 // 7 //
>> 8 // $Id: G4Decay.hh,v 1.6 2001/02/22 13:29:26 kurasige Exp $
>> 9 // GEANT4 tag $Name: geant4-03-01 $
27 // 10 //
28 // 11 //
29 // ------------------------------------------- 12 // ------------------------------------------------------------
30 // GEANT 4 class header file 13 // GEANT 4 class header file
31 // 14 //
>> 15 // For information related to this code contact:
>> 16 // CERN, CN Division, ASD group
32 // History: first implementation, based o 17 // History: first implementation, based on object model of
33 // 7 July 1996 H.Kurashige 18 // 7 July 1996 H.Kurashige
34 // ------------------------------------------- 19 // ------------------------------------------------------------
35 // New Physics scheme 18 Jan. 1997 20 // New Physics scheme 18 Jan. 1997 H.Kurahige
36 // ------------------------------------------- 21 // ------------------------------------------------------------
37 // modified 4 Feb. 1997 22 // modified 4 Feb. 1997 H.Kurahige
38 // modified 8 Sep. 1997 23 // modified 8 Sep. 1997 H.Kurahige
39 // remove BuildPhysicsTable() 27 Nov. 1997 24 // remove BuildPhysicsTable() 27 Nov. 1997 H.Kurashige
40 // modified for new ParticleChange 12 Mar. 1 25 // modified for new ParticleChange 12 Mar. 1998 H.Kurashige
41 // added aPhysicsTable 2 Aug. 1998 26 // added aPhysicsTable 2 Aug. 1998 H.Kurashige
42 // PreAssignedDecayTime 18 Jan. 2001 27 // PreAssignedDecayTime 18 Jan. 2001 H.Kurashige
43 // Add External Decayer 23 Feb. 2001 28 // Add External Decayer 23 Feb. 2001 H.Kurashige
44 // Remove PhysicsTable 12 Feb. 2002 << 29 //
45 // Fixed bug in PostStepGPIL <<
46 // in case of stopping during AlongStepDoIt <<
47 // Add GetRemainderLifeTime 10 Aug/2004 H.K <<
48 // Add DaughterPolarization 23 July 2008 <<
49 <<
50 <<
51 #ifndef G4Decay_h 30 #ifndef G4Decay_h
52 #define G4Decay_h 1 31 #define G4Decay_h 1
53 32
54 #include "G4ios.hh" 33 #include "G4ios.hh"
55 #include "globals.hh" 34 #include "globals.hh"
56 #include "G4VRestDiscreteProcess.hh" 35 #include "G4VRestDiscreteProcess.hh"
57 #include "G4ParticleChangeForDecay.hh" 36 #include "G4ParticleChangeForDecay.hh"
58 #include "G4DecayProcessType.hh" <<
59 <<
60 class G4VExtDecayer; 37 class G4VExtDecayer;
61 38
62 class G4Decay : public G4VRestDiscreteProcess 39 class G4Decay : public G4VRestDiscreteProcess
63 { 40 {
64 // Class Description 41 // Class Description
65 // This class is a decay process 42 // This class is a decay process
66 43
67 public: 44 public:
68 // Constructors 45 // Constructors
69 G4Decay(const G4String& processName ="Deca 46 G4Decay(const G4String& processName ="Decay");
70 47
71 // Destructor 48 // Destructor
72 virtual ~G4Decay(); 49 virtual ~G4Decay();
73 50
74 private: 51 private:
75 // copy constructor 52 // copy constructor
76 G4Decay(const G4Decay &right); 53 G4Decay(const G4Decay &right);
77 54
78 // Assignment Operation (generated) 55 // Assignment Operation (generated)
79 G4Decay & operator=(const G4Decay &right 56 G4Decay & operator=(const G4Decay &right);
80 57
81 public: //With Description 58 public: //With Description
82 // G4Decay Process has both 59 // G4Decay Process has both
83 // PostStepDoIt (for decay in flight) 60 // PostStepDoIt (for decay in flight)
84 // and 61 // and
85 // AtRestDoIt (for decay at rest) 62 // AtRestDoIt (for decay at rest)
86 63
87 virtual G4VParticleChange *PostStepDoIt( 64 virtual G4VParticleChange *PostStepDoIt(
88 const G4Track& aTrack, 65 const G4Track& aTrack,
89 const G4Step& aSt 66 const G4Step& aStep
90 ) override; << 67 );
91 68
92 virtual G4VParticleChange* AtRestDoIt( 69 virtual G4VParticleChange* AtRestDoIt(
93 const G4Track& aTrack, 70 const G4Track& aTrack,
94 const G4Step& aStep 71 const G4Step& aStep
95 ) override; << 72 );
96 73
97 virtual void BuildPhysicsTable(const G4Pa << 74 virtual void BuildPhysicsTable(const G4ParticleDefinition&);
98 // In G4Decay, thePhysicsTable stores val 75 // In G4Decay, thePhysicsTable stores values of
99 // beta * std::sqrt( 1 - beta*beta) << 76 // beta * sqrt( 1 - beta*beta)
100 // as a function of normalized kinetic en 77 // as a function of normalized kinetic enregy (=Ekin/mass),
101 // becasuse this table is universal for a 78 // becasuse this table is universal for all particle types,
102 79
103 80
104 virtual G4bool IsApplicable(const G4Partic << 81 virtual G4bool IsApplicable(const G4ParticleDefinition&);
105 // returns "true" if the decay process can 82 // returns "true" if the decay process can be applied to
106 // the particle type. 83 // the particle type.
107 84
108 protected: // With Description 85 protected: // With Description
109 virtual G4VParticleChange* DecayIt( 86 virtual G4VParticleChange* DecayIt(
110 const G4Track& aTrack, 87 const G4Track& aTrack,
111 const G4Step& aStep 88 const G4Step& aStep
112 ); 89 );
113 // The DecayIt() method returns by pointer 90 // The DecayIt() method returns by pointer a particle-change object,
114 // which has information of daughter parti 91 // which has information of daughter particles.
115 92
116 // Set daughter polarization << 93 public:
117 // NO OPERATION in the base class of G4De <<
118 virtual void DaughterPolarization(const G4 <<
119 G4DecayProducts* products); <<
120 <<
121 public: <<
122 virtual G4double AtRestGetPhysicalInteract 94 virtual G4double AtRestGetPhysicalInteractionLength(
123 const G4Track& tr 95 const G4Track& track,
124 G4ForceCondition* 96 G4ForceCondition* condition
125 ) override; << 97 );
126 98
127 virtual G4double PostStepGetPhysicalIntera 99 virtual G4double PostStepGetPhysicalInteractionLength(
128 const G4Track& tr 100 const G4Track& track,
129 G4double previo 101 G4double previousStepSize,
130 G4ForceCondition* 102 G4ForceCondition* condition
131 ) override; << 103 );
>> 104
132 105
133 protected: // With Description 106 protected: // With Description
134 // GetMeanFreePath returns ctau*beta*gamma 107 // GetMeanFreePath returns ctau*beta*gamma for decay in flight
135 // GetMeanLifeTime returns ctau for decay 108 // GetMeanLifeTime returns ctau for decay at rest
136 virtual G4double GetMeanFreePath(const G4T 109 virtual G4double GetMeanFreePath(const G4Track& aTrack,
137 G4double previ 110 G4double previousStepSize,
138 G4ForceCondition 111 G4ForceCondition* condition
139 ) override; << 112 );
140 113
141 virtual G4double GetMeanLifeTime(const G4T 114 virtual G4double GetMeanLifeTime(const G4Track& aTrack,
142 G4ForceCondition 115 G4ForceCondition* condition
143 ) override; << 116 );
144 <<
145 public: //With Description <<
146 virtual void StartTracking(G4Track*) over <<
147 virtual void EndTracking() override; <<
148 // inform Start/End of tracking for each <<
149 117
150 public: //With Description << 118 public: //With Description
151 void SetExtDecayer(G4VExtDecayer*); 119 void SetExtDecayer(G4VExtDecayer*);
152 const G4VExtDecayer* GetExtDecayer() cons 120 const G4VExtDecayer* GetExtDecayer() const;
153 // Set/Get External Decayer 121 // Set/Get External Decayer
154 << 122
155 G4double GetRemainderLifeTime() const; << 123 public:
156 //Get Remainder of life time at rest decay << 124 void SetVerboseLevel(G4int value);
157 << 125 G4int GetVerboseLevel() const;
158 virtual void ProcessDescription(std::ostre <<
159 // <<
160 126
161 protected: << 127 private:
162 G4int verboseLevel; 128 G4int verboseLevel;
163 // controle flag for output message 129 // controle flag for output message
164 // 0: Silent 130 // 0: Silent
165 // 1: Warning message 131 // 1: Warning message
166 // 2: More 132 // 2: More
167 133
168 protected: << 134 private:
169 // HighestValue. << 135 // In G4Decay, thePhysicsTable stores values of
170 const G4double HighestValue; << 136 // beta * sqrt( 1 - beta*beta)
>> 137 // as a function of normalized kinetic enregy (=Ekin/mass)
>> 138 // TotBin = number of bins in thePhysicsTable
>> 139 // The PhysicsTable is created for the range of
>> 140 // from LowestBinValue to HighestBinValue.
>> 141 const G4double LowestBinValue;
>> 142 const G4double HighestBinValue;
>> 143 const G4int TotBin;
>> 144
>> 145 G4PhysicsTable* aPhysicsTable;
171 146
172 // Remainder of life time at rest 147 // Remainder of life time at rest
173 G4double fRemainderLifeTim 148 G4double fRemainderLifeTime;
174 << 149
175 // ParticleChange for decay process 150 // ParticleChange for decay process
176 G4ParticleChangeForDecay fParticleChangeFo 151 G4ParticleChangeForDecay fParticleChangeForDecay;
177 152
178 // External Decayer 153 // External Decayer
179 G4VExtDecayer* pExtDecayer; 154 G4VExtDecayer* pExtDecayer;
180 }; 155 };
181 156
>> 157 inline G4double G4Decay::PostStepGetPhysicalInteractionLength(
>> 158 const G4Track& track,
>> 159 G4double previousStepSize,
>> 160 G4ForceCondition* condition
>> 161 )
>> 162 {
>> 163 // pre-assigned Decay time
>> 164 G4double pTime = track.GetDynamicParticle()->GetPreAssignedDecayProperTime();
>> 165
>> 166 if (pTime < 0.) {
>> 167 // normal case
>> 168 return G4VRestDiscreteProcess::PostStepGetPhysicalInteractionLength(track, previousStepSize, condition);
>> 169 }
>> 170
>> 171 // condition is set to "Not Forced"
>> 172 *condition = NotForced;
>> 173
>> 174 // reminder proper time
>> 175 fRemainderLifeTime = pTime - track.GetProperTime();
>> 176 if (fRemainderLifeTime <= 0.0) fRemainderLifeTime = DBL_MIN;
>> 177
>> 178 // use pre-assigned Decay time to determine PIL
>> 179 G4double tau = track.GetDefinition()->GetPDGLifeTime();
>> 180 return (fRemainderLifeTime/tau)*GetMeanFreePath(track, previousStepSize, condition);
>> 181
>> 182 }
>> 183 inline
>> 184 G4double G4Decay::AtRestGetPhysicalInteractionLength(
>> 185 const G4Track& track,
>> 186 G4ForceCondition* condition
>> 187 )
>> 188 {
>> 189 G4double pTime = track.GetDynamicParticle()->GetPreAssignedDecayProperTime();
>> 190 if (pTime >= 0.) {
>> 191 fRemainderLifeTime = pTime - track.GetProperTime();
>> 192 if (fRemainderLifeTime <= 0.0) fRemainderLifeTime = DBL_MIN;
>> 193 } else {
>> 194 fRemainderLifeTime =
>> 195 G4VRestDiscreteProcess::AtRestGetPhysicalInteractionLength(track, condition );
>> 196 }
>> 197 return fRemainderLifeTime;
>> 198 }
>> 199
>> 200 inline
>> 201 void G4Decay::SetVerboseLevel(G4int value){ verboseLevel = value; }
>> 202
>> 203 inline
>> 204 G4int G4Decay::GetVerboseLevel() const { return verboseLevel; }
>> 205
182 inline 206 inline
183 G4VParticleChange* G4Decay::AtRestDoIt( 207 G4VParticleChange* G4Decay::AtRestDoIt(
184 const G4Track& aTrack, 208 const G4Track& aTrack,
185 const G4Step& aStep 209 const G4Step& aStep
186 ) 210 )
187 { 211 {
188 return DecayIt(aTrack, aStep); 212 return DecayIt(aTrack, aStep);
189 } 213 }
190 214
>> 215 inline
>> 216 G4VParticleChange* G4Decay::PostStepDoIt(
>> 217 const G4Track& aTrack,
>> 218 const G4Step& aStep
>> 219 )
>> 220 {
>> 221 return DecayIt(aTrack, aStep);
>> 222 }
191 223
192 inline 224 inline
193 const G4VExtDecayer* G4Decay::GetExtDecayer() << 225 void G4Decay::SetExtDecayer(G4VExtDecayer* val)
194 { 226 {
195 return pExtDecayer; << 227 pExtDecayer = val;
196 } 228 }
197 229
198 inline 230 inline
199 G4double G4Decay::GetRemainderLifeTime() cons << 231 const G4VExtDecayer* G4Decay::GetExtDecayer() const
200 { 232 {
201 return fRemainderLifeTime; << 233 return pExtDecayer;
202 } 234 }
203 235
204 #endif 236 #endif
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