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25 // 22 //
26 // 23 //
>> 24 // $Id: G4Decay.hh,v 1.6.2.2 2001/06/28 20:19:17 gunter Exp $
>> 25 // GEANT4 tag $Name: $
27 // 26 //
28 // 27 //
29 // ------------------------------------------- 28 // ------------------------------------------------------------
30 // GEANT 4 class header file 29 // GEANT 4 class header file
31 // 30 //
32 // History: first implementation, based o 31 // History: first implementation, based on object model of
33 // 7 July 1996 H.Kurashige 32 // 7 July 1996 H.Kurashige
34 // ------------------------------------------- 33 // ------------------------------------------------------------
35 // New Physics scheme 18 Jan. 1997 34 // New Physics scheme 18 Jan. 1997 H.Kurahige
36 // ------------------------------------------- 35 // ------------------------------------------------------------
37 // modified 4 Feb. 1997 36 // modified 4 Feb. 1997 H.Kurahige
38 // modified 8 Sep. 1997 37 // modified 8 Sep. 1997 H.Kurahige
39 // remove BuildPhysicsTable() 27 Nov. 1997 38 // remove BuildPhysicsTable() 27 Nov. 1997 H.Kurashige
40 // modified for new ParticleChange 12 Mar. 1 39 // modified for new ParticleChange 12 Mar. 1998 H.Kurashige
41 // added aPhysicsTable 2 Aug. 1998 40 // added aPhysicsTable 2 Aug. 1998 H.Kurashige
42 // PreAssignedDecayTime 18 Jan. 2001 41 // PreAssignedDecayTime 18 Jan. 2001 H.Kurashige
43 // Add External Decayer 23 Feb. 2001 42 // Add External Decayer 23 Feb. 2001 H.Kurashige
44 // Remove PhysicsTable 12 Feb. 2002 << 43 //
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 44 #ifndef G4Decay_h
52 #define G4Decay_h 1 45 #define G4Decay_h 1
53 46
54 #include "G4ios.hh" 47 #include "G4ios.hh"
55 #include "globals.hh" 48 #include "globals.hh"
56 #include "G4VRestDiscreteProcess.hh" 49 #include "G4VRestDiscreteProcess.hh"
57 #include "G4ParticleChangeForDecay.hh" 50 #include "G4ParticleChangeForDecay.hh"
58 #include "G4DecayProcessType.hh" <<
59 <<
60 class G4VExtDecayer; 51 class G4VExtDecayer;
61 52
62 class G4Decay : public G4VRestDiscreteProcess 53 class G4Decay : public G4VRestDiscreteProcess
63 { 54 {
64 // Class Description 55 // Class Description
65 // This class is a decay process 56 // This class is a decay process
66 57
67 public: 58 public:
68 // Constructors 59 // Constructors
69 G4Decay(const G4String& processName ="Deca 60 G4Decay(const G4String& processName ="Decay");
70 61
71 // Destructor 62 // Destructor
72 virtual ~G4Decay(); 63 virtual ~G4Decay();
73 64
74 private: 65 private:
75 // copy constructor 66 // copy constructor
76 G4Decay(const G4Decay &right); 67 G4Decay(const G4Decay &right);
77 68
78 // Assignment Operation (generated) 69 // Assignment Operation (generated)
79 G4Decay & operator=(const G4Decay &right 70 G4Decay & operator=(const G4Decay &right);
80 71
81 public: //With Description 72 public: //With Description
82 // G4Decay Process has both 73 // G4Decay Process has both
83 // PostStepDoIt (for decay in flight) 74 // PostStepDoIt (for decay in flight)
84 // and 75 // and
85 // AtRestDoIt (for decay at rest) 76 // AtRestDoIt (for decay at rest)
86 77
87 virtual G4VParticleChange *PostStepDoIt( 78 virtual G4VParticleChange *PostStepDoIt(
88 const G4Track& aTrack, 79 const G4Track& aTrack,
89 const G4Step& aSt 80 const G4Step& aStep
90 ) override; << 81 );
91 82
92 virtual G4VParticleChange* AtRestDoIt( 83 virtual G4VParticleChange* AtRestDoIt(
93 const G4Track& aTrack, 84 const G4Track& aTrack,
94 const G4Step& aStep 85 const G4Step& aStep
95 ) override; << 86 );
96 87
97 virtual void BuildPhysicsTable(const G4Pa << 88 virtual void BuildPhysicsTable(const G4ParticleDefinition&);
98 // In G4Decay, thePhysicsTable stores val 89 // In G4Decay, thePhysicsTable stores values of
99 // beta * std::sqrt( 1 - beta*beta) << 90 // beta * sqrt( 1 - beta*beta)
100 // as a function of normalized kinetic en 91 // as a function of normalized kinetic enregy (=Ekin/mass),
101 // becasuse this table is universal for a 92 // becasuse this table is universal for all particle types,
102 93
103 94
104 virtual G4bool IsApplicable(const G4Partic << 95 virtual G4bool IsApplicable(const G4ParticleDefinition&);
105 // returns "true" if the decay process can 96 // returns "true" if the decay process can be applied to
106 // the particle type. 97 // the particle type.
107 98
108 protected: // With Description 99 protected: // With Description
109 virtual G4VParticleChange* DecayIt( 100 virtual G4VParticleChange* DecayIt(
110 const G4Track& aTrack, 101 const G4Track& aTrack,
111 const G4Step& aStep 102 const G4Step& aStep
112 ); 103 );
113 // The DecayIt() method returns by pointer 104 // The DecayIt() method returns by pointer a particle-change object,
114 // which has information of daughter parti 105 // which has information of daughter particles.
115 106
116 // Set daughter polarization << 107 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 108 virtual G4double AtRestGetPhysicalInteractionLength(
123 const G4Track& tr 109 const G4Track& track,
124 G4ForceCondition* 110 G4ForceCondition* condition
125 ) override; << 111 );
126 112
127 virtual G4double PostStepGetPhysicalIntera 113 virtual G4double PostStepGetPhysicalInteractionLength(
128 const G4Track& tr 114 const G4Track& track,
129 G4double previo 115 G4double previousStepSize,
130 G4ForceCondition* 116 G4ForceCondition* condition
131 ) override; << 117 );
>> 118
132 119
133 protected: // With Description 120 protected: // With Description
134 // GetMeanFreePath returns ctau*beta*gamma 121 // GetMeanFreePath returns ctau*beta*gamma for decay in flight
135 // GetMeanLifeTime returns ctau for decay 122 // GetMeanLifeTime returns ctau for decay at rest
136 virtual G4double GetMeanFreePath(const G4T 123 virtual G4double GetMeanFreePath(const G4Track& aTrack,
137 G4double previ 124 G4double previousStepSize,
138 G4ForceCondition 125 G4ForceCondition* condition
139 ) override; << 126 );
140 127
141 virtual G4double GetMeanLifeTime(const G4T 128 virtual G4double GetMeanLifeTime(const G4Track& aTrack,
142 G4ForceCondition 129 G4ForceCondition* condition
143 ) override; << 130 );
144 <<
145 public: //With Description <<
146 virtual void StartTracking(G4Track*) over <<
147 virtual void EndTracking() override; <<
148 // inform Start/End of tracking for each <<
149 131
150 public: //With Description << 132 public: //With Description
151 void SetExtDecayer(G4VExtDecayer*); 133 void SetExtDecayer(G4VExtDecayer*);
152 const G4VExtDecayer* GetExtDecayer() cons 134 const G4VExtDecayer* GetExtDecayer() const;
153 // Set/Get External Decayer 135 // Set/Get External Decayer
154 << 136
155 G4double GetRemainderLifeTime() const; << 137 public:
156 //Get Remainder of life time at rest decay << 138 void SetVerboseLevel(G4int value);
157 << 139 G4int GetVerboseLevel() const;
158 virtual void ProcessDescription(std::ostre <<
159 // <<
160 140
161 protected: << 141 private:
162 G4int verboseLevel; 142 G4int verboseLevel;
163 // controle flag for output message 143 // controle flag for output message
164 // 0: Silent 144 // 0: Silent
165 // 1: Warning message 145 // 1: Warning message
166 // 2: More 146 // 2: More
167 147
168 protected: << 148 private:
169 // HighestValue. << 149 // In G4Decay, thePhysicsTable stores values of
170 const G4double HighestValue; << 150 // beta * sqrt( 1 - beta*beta)
>> 151 // as a function of normalized kinetic enregy (=Ekin/mass)
>> 152 // TotBin = number of bins in thePhysicsTable
>> 153 // The PhysicsTable is created for the range of
>> 154 // from LowestBinValue to HighestBinValue.
>> 155 const G4double LowestBinValue;
>> 156 const G4double HighestBinValue;
>> 157 const G4int TotBin;
>> 158
>> 159 G4PhysicsTable* aPhysicsTable;
171 160
172 // Remainder of life time at rest 161 // Remainder of life time at rest
173 G4double fRemainderLifeTim 162 G4double fRemainderLifeTime;
174 << 163
175 // ParticleChange for decay process 164 // ParticleChange for decay process
176 G4ParticleChangeForDecay fParticleChangeFo 165 G4ParticleChangeForDecay fParticleChangeForDecay;
177 166
178 // External Decayer 167 // External Decayer
179 G4VExtDecayer* pExtDecayer; 168 G4VExtDecayer* pExtDecayer;
180 }; 169 };
181 170
>> 171 inline G4double G4Decay::PostStepGetPhysicalInteractionLength(
>> 172 const G4Track& track,
>> 173 G4double previousStepSize,
>> 174 G4ForceCondition* condition
>> 175 )
>> 176 {
>> 177 // pre-assigned Decay time
>> 178 G4double pTime = track.GetDynamicParticle()->GetPreAssignedDecayProperTime();
>> 179
>> 180 if (pTime < 0.) {
>> 181 // normal case
>> 182 return G4VRestDiscreteProcess::PostStepGetPhysicalInteractionLength(track, previousStepSize, condition);
>> 183 }
>> 184
>> 185 // condition is set to "Not Forced"
>> 186 *condition = NotForced;
>> 187
>> 188 // reminder proper time
>> 189 fRemainderLifeTime = pTime - track.GetProperTime();
>> 190 if (fRemainderLifeTime <= 0.0) fRemainderLifeTime = DBL_MIN;
>> 191
>> 192 // use pre-assigned Decay time to determine PIL
>> 193 G4double tau = track.GetDefinition()->GetPDGLifeTime();
>> 194 return (fRemainderLifeTime/tau)*GetMeanFreePath(track, previousStepSize, condition);
>> 195
>> 196 }
>> 197 inline
>> 198 G4double G4Decay::AtRestGetPhysicalInteractionLength(
>> 199 const G4Track& track,
>> 200 G4ForceCondition* condition
>> 201 )
>> 202 {
>> 203 G4double pTime = track.GetDynamicParticle()->GetPreAssignedDecayProperTime();
>> 204 if (pTime >= 0.) {
>> 205 fRemainderLifeTime = pTime - track.GetProperTime();
>> 206 if (fRemainderLifeTime <= 0.0) fRemainderLifeTime = DBL_MIN;
>> 207 } else {
>> 208 fRemainderLifeTime =
>> 209 G4VRestDiscreteProcess::AtRestGetPhysicalInteractionLength(track, condition );
>> 210 }
>> 211 return fRemainderLifeTime;
>> 212 }
>> 213
>> 214 inline
>> 215 void G4Decay::SetVerboseLevel(G4int value){ verboseLevel = value; }
>> 216
>> 217 inline
>> 218 G4int G4Decay::GetVerboseLevel() const { return verboseLevel; }
>> 219
182 inline 220 inline
183 G4VParticleChange* G4Decay::AtRestDoIt( 221 G4VParticleChange* G4Decay::AtRestDoIt(
184 const G4Track& aTrack, 222 const G4Track& aTrack,
185 const G4Step& aStep 223 const G4Step& aStep
186 ) 224 )
187 { 225 {
188 return DecayIt(aTrack, aStep); 226 return DecayIt(aTrack, aStep);
189 } 227 }
190 228
>> 229 inline
>> 230 G4VParticleChange* G4Decay::PostStepDoIt(
>> 231 const G4Track& aTrack,
>> 232 const G4Step& aStep
>> 233 )
>> 234 {
>> 235 return DecayIt(aTrack, aStep);
>> 236 }
191 237
192 inline 238 inline
193 const G4VExtDecayer* G4Decay::GetExtDecayer() << 239 void G4Decay::SetExtDecayer(G4VExtDecayer* val)
194 { 240 {
195 return pExtDecayer; << 241 pExtDecayer = val;
196 } 242 }
197 243
198 inline 244 inline
199 G4double G4Decay::GetRemainderLifeTime() cons << 245 const G4VExtDecayer* G4Decay::GetExtDecayer() const
200 { 246 {
201 return fRemainderLifeTime; << 247 return pExtDecayer;
202 } 248 }
203 249
204 #endif 250 #endif
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