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25 // 22 //
26 // 23 //
>> 24 // $Id: G4Decay.hh,v 1.9 2004/03/12 04:46:31 kurasige Exp $
>> 25 // GEANT4 tag $Name: geant4-06-01 $
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 // Fixed bug in PostStepGPIL
46 // in case of stopping during AlongStepDoIt 45 // in case of stopping during AlongStepDoIt 12 Mar. 2004 H.Kurashige
47 // Add GetRemainderLifeTime 10 Aug/2004 H.K << 46 //
48 // Add DaughterPolarization 23 July 2008 <<
49 <<
50 <<
51 #ifndef G4Decay_h 47 #ifndef G4Decay_h
52 #define G4Decay_h 1 48 #define G4Decay_h 1
53 49
54 #include "G4ios.hh" 50 #include "G4ios.hh"
55 #include "globals.hh" 51 #include "globals.hh"
56 #include "G4VRestDiscreteProcess.hh" 52 #include "G4VRestDiscreteProcess.hh"
57 #include "G4ParticleChangeForDecay.hh" 53 #include "G4ParticleChangeForDecay.hh"
58 #include "G4DecayProcessType.hh" <<
59 <<
60 class G4VExtDecayer; 54 class G4VExtDecayer;
61 55
62 class G4Decay : public G4VRestDiscreteProcess 56 class G4Decay : public G4VRestDiscreteProcess
63 { 57 {
64 // Class Description 58 // Class Description
65 // This class is a decay process 59 // This class is a decay process
66 60
67 public: 61 public:
68 // Constructors 62 // Constructors
69 G4Decay(const G4String& processName ="Deca 63 G4Decay(const G4String& processName ="Decay");
70 64
71 // Destructor 65 // Destructor
72 virtual ~G4Decay(); 66 virtual ~G4Decay();
73 67
74 private: 68 private:
75 // copy constructor 69 // copy constructor
76 G4Decay(const G4Decay &right); 70 G4Decay(const G4Decay &right);
77 71
78 // Assignment Operation (generated) 72 // Assignment Operation (generated)
79 G4Decay & operator=(const G4Decay &right 73 G4Decay & operator=(const G4Decay &right);
80 74
81 public: //With Description 75 public: //With Description
82 // G4Decay Process has both 76 // G4Decay Process has both
83 // PostStepDoIt (for decay in flight) 77 // PostStepDoIt (for decay in flight)
84 // and 78 // and
85 // AtRestDoIt (for decay at rest) 79 // AtRestDoIt (for decay at rest)
86 80
87 virtual G4VParticleChange *PostStepDoIt( 81 virtual G4VParticleChange *PostStepDoIt(
88 const G4Track& aTrack, 82 const G4Track& aTrack,
89 const G4Step& aSt 83 const G4Step& aStep
90 ) override; << 84 );
91 85
92 virtual G4VParticleChange* AtRestDoIt( 86 virtual G4VParticleChange* AtRestDoIt(
93 const G4Track& aTrack, 87 const G4Track& aTrack,
94 const G4Step& aStep 88 const G4Step& aStep
95 ) override; << 89 );
96 90
97 virtual void BuildPhysicsTable(const G4Pa << 91 virtual void BuildPhysicsTable(const G4ParticleDefinition&);
98 // In G4Decay, thePhysicsTable stores val 92 // In G4Decay, thePhysicsTable stores values of
99 // beta * std::sqrt( 1 - beta*beta) << 93 // beta * sqrt( 1 - beta*beta)
100 // as a function of normalized kinetic en 94 // as a function of normalized kinetic enregy (=Ekin/mass),
101 // becasuse this table is universal for a 95 // becasuse this table is universal for all particle types,
102 96
103 97
104 virtual G4bool IsApplicable(const G4Partic << 98 virtual G4bool IsApplicable(const G4ParticleDefinition&);
105 // returns "true" if the decay process can 99 // returns "true" if the decay process can be applied to
106 // the particle type. 100 // the particle type.
107 101
108 protected: // With Description 102 protected: // With Description
109 virtual G4VParticleChange* DecayIt( 103 virtual G4VParticleChange* DecayIt(
110 const G4Track& aTrack, 104 const G4Track& aTrack,
111 const G4Step& aStep 105 const G4Step& aStep
112 ); 106 );
113 // The DecayIt() method returns by pointer 107 // The DecayIt() method returns by pointer a particle-change object,
114 // which has information of daughter parti 108 // which has information of daughter particles.
115 109
116 // Set daughter polarization << 110 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 111 virtual G4double AtRestGetPhysicalInteractionLength(
123 const G4Track& tr 112 const G4Track& track,
124 G4ForceCondition* 113 G4ForceCondition* condition
125 ) override; << 114 );
126 115
127 virtual G4double PostStepGetPhysicalIntera 116 virtual G4double PostStepGetPhysicalInteractionLength(
128 const G4Track& tr 117 const G4Track& track,
129 G4double previo 118 G4double previousStepSize,
130 G4ForceCondition* 119 G4ForceCondition* condition
131 ) override; << 120 );
>> 121
132 122
133 protected: // With Description 123 protected: // With Description
134 // GetMeanFreePath returns ctau*beta*gamma 124 // GetMeanFreePath returns ctau*beta*gamma for decay in flight
135 // GetMeanLifeTime returns ctau for decay 125 // GetMeanLifeTime returns ctau for decay at rest
136 virtual G4double GetMeanFreePath(const G4T 126 virtual G4double GetMeanFreePath(const G4Track& aTrack,
137 G4double previ 127 G4double previousStepSize,
138 G4ForceCondition 128 G4ForceCondition* condition
139 ) override; << 129 );
140 130
141 virtual G4double GetMeanLifeTime(const G4T 131 virtual G4double GetMeanLifeTime(const G4Track& aTrack,
142 G4ForceCondition 132 G4ForceCondition* condition
143 ) override; << 133 );
144 <<
145 public: //With Description <<
146 virtual void StartTracking(G4Track*) over <<
147 virtual void EndTracking() override; <<
148 // inform Start/End of tracking for each <<
149 134
150 public: //With Description << 135 public: //With Description
151 void SetExtDecayer(G4VExtDecayer*); 136 void SetExtDecayer(G4VExtDecayer*);
152 const G4VExtDecayer* GetExtDecayer() cons 137 const G4VExtDecayer* GetExtDecayer() const;
153 // Set/Get External Decayer 138 // Set/Get External Decayer
154 << 139
155 G4double GetRemainderLifeTime() const; << 140 public:
156 //Get Remainder of life time at rest decay << 141 void SetVerboseLevel(G4int value);
157 << 142 G4int GetVerboseLevel() const;
158 virtual void ProcessDescription(std::ostre <<
159 // <<
160 143
161 protected: << 144 private:
162 G4int verboseLevel; 145 G4int verboseLevel;
163 // controle flag for output message 146 // controle flag for output message
164 // 0: Silent 147 // 0: Silent
165 // 1: Warning message 148 // 1: Warning message
166 // 2: More 149 // 2: More
167 150
168 protected: << 151 private:
169 // HighestValue. 152 // HighestValue.
170 const G4double HighestValue; 153 const G4double HighestValue;
171 154
172 // Remainder of life time at rest 155 // Remainder of life time at rest
173 G4double fRemainderLifeTim 156 G4double fRemainderLifeTime;
174 << 157
175 // ParticleChange for decay process 158 // ParticleChange for decay process
176 G4ParticleChangeForDecay fParticleChangeFo 159 G4ParticleChangeForDecay fParticleChangeForDecay;
177 160
178 // External Decayer 161 // External Decayer
179 G4VExtDecayer* pExtDecayer; 162 G4VExtDecayer* pExtDecayer;
180 }; 163 };
181 164
>> 165 inline
>> 166 G4double G4Decay::PostStepGetPhysicalInteractionLength(
>> 167 const G4Track& track,
>> 168 G4double previousStepSize,
>> 169 G4ForceCondition* condition
>> 170 )
>> 171 {
>> 172 // reset fRemainderLifeTime
>> 173 fRemainderLifeTime = 0.0;
>> 174
>> 175 // pre-assigned Decay time
>> 176 G4double pTime = track.GetDynamicParticle()->GetPreAssignedDecayProperTime();
>> 177
>> 178 if (pTime < 0.) {
>> 179 // normal case
>> 180 fRemainderLifeTime = 0.0;
>> 181 return G4VRestDiscreteProcess::PostStepGetPhysicalInteractionLength(track, previousStepSize, condition);
>> 182 }
>> 183
>> 184 // condition is set to "Not Forced"
>> 185 *condition = NotForced;
>> 186
>> 187 // reminder proper time
>> 188 G4double remainder = pTime - track.GetProperTime();
>> 189 if (remainder <= 0.0) remainder = DBL_MIN;
>> 190
>> 191 // use pre-assigned Decay time to determine PIL
>> 192 G4double tau = track.GetDefinition()->GetPDGLifeTime();
>> 193 return (remainder/tau)*GetMeanFreePath(track, previousStepSize, condition);
>> 194
>> 195 }
>> 196 inline
>> 197 G4double G4Decay::AtRestGetPhysicalInteractionLength(
>> 198 const G4Track& track,
>> 199 G4ForceCondition* condition
>> 200 )
>> 201 {
>> 202 G4double pTime = track.GetDynamicParticle()->GetPreAssignedDecayProperTime();
>> 203 if (pTime >= 0.) {
>> 204 fRemainderLifeTime = pTime - track.GetProperTime();
>> 205 if (fRemainderLifeTime <= 0.0) fRemainderLifeTime = DBL_MIN;
>> 206 } else {
>> 207 fRemainderLifeTime =
>> 208 G4VRestDiscreteProcess::AtRestGetPhysicalInteractionLength(track, condition );
>> 209 }
>> 210 return fRemainderLifeTime;
>> 211 }
>> 212
>> 213 inline
>> 214 void G4Decay::SetVerboseLevel(G4int value){ verboseLevel = value; }
>> 215
>> 216 inline
>> 217 G4int G4Decay::GetVerboseLevel() const { return verboseLevel; }
>> 218
182 inline 219 inline
183 G4VParticleChange* G4Decay::AtRestDoIt( 220 G4VParticleChange* G4Decay::AtRestDoIt(
184 const G4Track& aTrack, 221 const G4Track& aTrack,
185 const G4Step& aStep 222 const G4Step& aStep
186 ) 223 )
187 { 224 {
188 return DecayIt(aTrack, aStep); 225 return DecayIt(aTrack, aStep);
189 } 226 }
190 227
>> 228 inline
>> 229 G4VParticleChange* G4Decay::PostStepDoIt(
>> 230 const G4Track& aTrack,
>> 231 const G4Step& aStep
>> 232 )
>> 233 {
>> 234 return DecayIt(aTrack, aStep);
>> 235 }
191 236
192 inline 237 inline
193 const G4VExtDecayer* G4Decay::GetExtDecayer() << 238 void G4Decay::SetExtDecayer(G4VExtDecayer* val)
194 { 239 {
195 return pExtDecayer; << 240 pExtDecayer = val;
196 } 241 }
197 242
198 inline 243 inline
199 G4double G4Decay::GetRemainderLifeTime() cons << 244 const G4VExtDecayer* G4Decay::GetExtDecayer() const
200 { 245 {
201 return fRemainderLifeTime; << 246 return pExtDecayer;
202 } 247 }
203 248
204 #endif 249 #endif
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