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25 // 22 //
26 // 23 //
>> 24 // $Id: G4Decay.hh,v 1.8 2002/02/12 02:14:03 kurasige Exp $
>> 25 // GEANT4 tag $Name: geant4-04-01 $
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 // Remove PhysicsTable 12 Feb. 2002 H.Kurashige
45 // Fixed bug in PostStepGPIL << 44 //
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 45 #ifndef G4Decay_h
52 #define G4Decay_h 1 46 #define G4Decay_h 1
53 47
54 #include "G4ios.hh" 48 #include "G4ios.hh"
55 #include "globals.hh" 49 #include "globals.hh"
56 #include "G4VRestDiscreteProcess.hh" 50 #include "G4VRestDiscreteProcess.hh"
57 #include "G4ParticleChangeForDecay.hh" 51 #include "G4ParticleChangeForDecay.hh"
58 #include "G4DecayProcessType.hh" <<
59 <<
60 class G4VExtDecayer; 52 class G4VExtDecayer;
61 53
62 class G4Decay : public G4VRestDiscreteProcess 54 class G4Decay : public G4VRestDiscreteProcess
63 { 55 {
64 // Class Description 56 // Class Description
65 // This class is a decay process 57 // This class is a decay process
66 58
67 public: 59 public:
68 // Constructors 60 // Constructors
69 G4Decay(const G4String& processName ="Deca 61 G4Decay(const G4String& processName ="Decay");
70 62
71 // Destructor 63 // Destructor
72 virtual ~G4Decay(); 64 virtual ~G4Decay();
73 65
74 private: 66 private:
75 // copy constructor 67 // copy constructor
76 G4Decay(const G4Decay &right); 68 G4Decay(const G4Decay &right);
77 69
78 // Assignment Operation (generated) 70 // Assignment Operation (generated)
79 G4Decay & operator=(const G4Decay &right 71 G4Decay & operator=(const G4Decay &right);
80 72
81 public: //With Description 73 public: //With Description
82 // G4Decay Process has both 74 // G4Decay Process has both
83 // PostStepDoIt (for decay in flight) 75 // PostStepDoIt (for decay in flight)
84 // and 76 // and
85 // AtRestDoIt (for decay at rest) 77 // AtRestDoIt (for decay at rest)
86 78
87 virtual G4VParticleChange *PostStepDoIt( 79 virtual G4VParticleChange *PostStepDoIt(
88 const G4Track& aTrack, 80 const G4Track& aTrack,
89 const G4Step& aSt 81 const G4Step& aStep
90 ) override; << 82 );
91 83
92 virtual G4VParticleChange* AtRestDoIt( 84 virtual G4VParticleChange* AtRestDoIt(
93 const G4Track& aTrack, 85 const G4Track& aTrack,
94 const G4Step& aStep 86 const G4Step& aStep
95 ) override; << 87 );
96 88
97 virtual void BuildPhysicsTable(const G4Pa << 89 virtual void BuildPhysicsTable(const G4ParticleDefinition&);
98 // In G4Decay, thePhysicsTable stores val 90 // In G4Decay, thePhysicsTable stores values of
99 // beta * std::sqrt( 1 - beta*beta) << 91 // beta * sqrt( 1 - beta*beta)
100 // as a function of normalized kinetic en 92 // as a function of normalized kinetic enregy (=Ekin/mass),
101 // becasuse this table is universal for a 93 // becasuse this table is universal for all particle types,
102 94
103 95
104 virtual G4bool IsApplicable(const G4Partic << 96 virtual G4bool IsApplicable(const G4ParticleDefinition&);
105 // returns "true" if the decay process can 97 // returns "true" if the decay process can be applied to
106 // the particle type. 98 // the particle type.
107 99
108 protected: // With Description 100 protected: // With Description
109 virtual G4VParticleChange* DecayIt( 101 virtual G4VParticleChange* DecayIt(
110 const G4Track& aTrack, 102 const G4Track& aTrack,
111 const G4Step& aStep 103 const G4Step& aStep
112 ); 104 );
113 // The DecayIt() method returns by pointer 105 // The DecayIt() method returns by pointer a particle-change object,
114 // which has information of daughter parti 106 // which has information of daughter particles.
115 107
116 // Set daughter polarization << 108 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 109 virtual G4double AtRestGetPhysicalInteractionLength(
123 const G4Track& tr 110 const G4Track& track,
124 G4ForceCondition* 111 G4ForceCondition* condition
125 ) override; << 112 );
126 113
127 virtual G4double PostStepGetPhysicalIntera 114 virtual G4double PostStepGetPhysicalInteractionLength(
128 const G4Track& tr 115 const G4Track& track,
129 G4double previo 116 G4double previousStepSize,
130 G4ForceCondition* 117 G4ForceCondition* condition
131 ) override; << 118 );
>> 119
132 120
133 protected: // With Description 121 protected: // With Description
134 // GetMeanFreePath returns ctau*beta*gamma 122 // GetMeanFreePath returns ctau*beta*gamma for decay in flight
135 // GetMeanLifeTime returns ctau for decay 123 // GetMeanLifeTime returns ctau for decay at rest
136 virtual G4double GetMeanFreePath(const G4T 124 virtual G4double GetMeanFreePath(const G4Track& aTrack,
137 G4double previ 125 G4double previousStepSize,
138 G4ForceCondition 126 G4ForceCondition* condition
139 ) override; << 127 );
140 128
141 virtual G4double GetMeanLifeTime(const G4T 129 virtual G4double GetMeanLifeTime(const G4Track& aTrack,
142 G4ForceCondition 130 G4ForceCondition* condition
143 ) override; << 131 );
144 <<
145 public: //With Description <<
146 virtual void StartTracking(G4Track*) over <<
147 virtual void EndTracking() override; <<
148 // inform Start/End of tracking for each <<
149 132
150 public: //With Description << 133 public: //With Description
151 void SetExtDecayer(G4VExtDecayer*); 134 void SetExtDecayer(G4VExtDecayer*);
152 const G4VExtDecayer* GetExtDecayer() cons 135 const G4VExtDecayer* GetExtDecayer() const;
153 // Set/Get External Decayer 136 // Set/Get External Decayer
154 << 137
155 G4double GetRemainderLifeTime() const; << 138 public:
156 //Get Remainder of life time at rest decay << 139 void SetVerboseLevel(G4int value);
157 << 140 G4int GetVerboseLevel() const;
158 virtual void ProcessDescription(std::ostre <<
159 // <<
160 141
161 protected: << 142 private:
162 G4int verboseLevel; 143 G4int verboseLevel;
163 // controle flag for output message 144 // controle flag for output message
164 // 0: Silent 145 // 0: Silent
165 // 1: Warning message 146 // 1: Warning message
166 // 2: More 147 // 2: More
167 148
168 protected: << 149 private:
169 // HighestValue. 150 // HighestValue.
170 const G4double HighestValue; 151 const G4double HighestValue;
171 152
172 // Remainder of life time at rest 153 // Remainder of life time at rest
173 G4double fRemainderLifeTim 154 G4double fRemainderLifeTime;
174 << 155
175 // ParticleChange for decay process 156 // ParticleChange for decay process
176 G4ParticleChangeForDecay fParticleChangeFo 157 G4ParticleChangeForDecay fParticleChangeForDecay;
177 158
178 // External Decayer 159 // External Decayer
179 G4VExtDecayer* pExtDecayer; 160 G4VExtDecayer* pExtDecayer;
180 }; 161 };
181 162
>> 163 inline G4double G4Decay::PostStepGetPhysicalInteractionLength(
>> 164 const G4Track& track,
>> 165 G4double previousStepSize,
>> 166 G4ForceCondition* condition
>> 167 )
>> 168 {
>> 169 // pre-assigned Decay time
>> 170 G4double pTime = track.GetDynamicParticle()->GetPreAssignedDecayProperTime();
>> 171
>> 172 if (pTime < 0.) {
>> 173 // normal case
>> 174 return G4VRestDiscreteProcess::PostStepGetPhysicalInteractionLength(track, previousStepSize, condition);
>> 175 }
>> 176
>> 177 // condition is set to "Not Forced"
>> 178 *condition = NotForced;
>> 179
>> 180 // reminder proper time
>> 181 fRemainderLifeTime = pTime - track.GetProperTime();
>> 182 if (fRemainderLifeTime <= 0.0) fRemainderLifeTime = DBL_MIN;
>> 183
>> 184 // use pre-assigned Decay time to determine PIL
>> 185 G4double tau = track.GetDefinition()->GetPDGLifeTime();
>> 186 return (fRemainderLifeTime/tau)*GetMeanFreePath(track, previousStepSize, condition);
>> 187
>> 188 }
>> 189 inline
>> 190 G4double G4Decay::AtRestGetPhysicalInteractionLength(
>> 191 const G4Track& track,
>> 192 G4ForceCondition* condition
>> 193 )
>> 194 {
>> 195 G4double pTime = track.GetDynamicParticle()->GetPreAssignedDecayProperTime();
>> 196 if (pTime >= 0.) {
>> 197 fRemainderLifeTime = pTime - track.GetProperTime();
>> 198 if (fRemainderLifeTime <= 0.0) fRemainderLifeTime = DBL_MIN;
>> 199 } else {
>> 200 fRemainderLifeTime =
>> 201 G4VRestDiscreteProcess::AtRestGetPhysicalInteractionLength(track, condition );
>> 202 }
>> 203 return fRemainderLifeTime;
>> 204 }
>> 205
>> 206 inline
>> 207 void G4Decay::SetVerboseLevel(G4int value){ verboseLevel = value; }
>> 208
>> 209 inline
>> 210 G4int G4Decay::GetVerboseLevel() const { return verboseLevel; }
>> 211
182 inline 212 inline
183 G4VParticleChange* G4Decay::AtRestDoIt( 213 G4VParticleChange* G4Decay::AtRestDoIt(
184 const G4Track& aTrack, 214 const G4Track& aTrack,
185 const G4Step& aStep 215 const G4Step& aStep
186 ) 216 )
187 { 217 {
188 return DecayIt(aTrack, aStep); 218 return DecayIt(aTrack, aStep);
189 } 219 }
190 220
>> 221 inline
>> 222 G4VParticleChange* G4Decay::PostStepDoIt(
>> 223 const G4Track& aTrack,
>> 224 const G4Step& aStep
>> 225 )
>> 226 {
>> 227 return DecayIt(aTrack, aStep);
>> 228 }
191 229
192 inline 230 inline
193 const G4VExtDecayer* G4Decay::GetExtDecayer() << 231 void G4Decay::SetExtDecayer(G4VExtDecayer* val)
194 { 232 {
195 return pExtDecayer; << 233 pExtDecayer = val;
196 } 234 }
197 235
198 inline 236 inline
199 G4double G4Decay::GetRemainderLifeTime() cons << 237 const G4VExtDecayer* G4Decay::GetExtDecayer() const
200 { 238 {
201 return fRemainderLifeTime; << 239 return pExtDecayer;
202 } 240 }
203 241
204 #endif 242 #endif
205 243
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