Geant4  10.00.p01
G4CascadeCoalescence.hh
Go to the documentation of this file.
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 // G4CascadeCoalescence: Factory model for final-state interactions to
27 // produce light ions from cascade nucleons. The algorithm implemented
28 // here is descirbed in Section 2.3 of the LAQGSM documentation (p. 11-12)
29 // [http://lib-www.lanl.gov/la-pubs/00818645.pdf].
30 //
31 // 20110917 Michael Kelsey
32 // 20110920 M. Kelsey -- Use environment variables to set momentum cuts for tuning,
33 // replace polymorphic argument lists with use of "ClusterCandidate"
34 
35 #ifndef G4CASCADE_COALESCENCE_HH
36 #define G4CASCADE_COALESCENCE_HH
37 
38 #include "globals.hh"
39 #include "G4InuclNuclei.hh"
40 #include "G4LorentzVector.hh"
41 #include <vector>
42 #include <set>
43 
44 class G4CollisionOutput;
46 
47 
49 public:
50  G4CascadeCoalescence(G4int verbose=0);
51  virtual ~G4CascadeCoalescence();
52 
53  // Final state particle list is modified directly
54  void FindClusters(G4CollisionOutput& finalState);
55 
56  void setVerboseLevel(G4int verbose) { verboseLevel = verbose; }
57 
58 private:
59  typedef std::vector<size_t> ClusterCandidate; // Indices of constituents
60 
61  G4int verboseLevel; // Control diagnostic messages
62 
63  static const G4double dpMaxDoublet; // Relative momenta for clusters
64  static const G4double dpMaxTriplet;
65  static const G4double dpMaxAlpha;
66 
67  std::vector<ClusterCandidate> allClusters; // List of candidates found
68  std::set<size_t> triedClusters; // Hashes of combinatorics
69  std::set<size_t> usedNucleons; // List of converted nucleons
70 
71  G4CollisionOutput* thisFinalState; // Pointers to current event
72  const std::vector<G4InuclElementaryParticle>* thisHadrons;
73 
74  ClusterCandidate thisCluster; // Reusable buffer for attempts
75  G4InuclNuclei thisLightIon; // Reusable construction buffer
76 
77  // Processing stages -- search, construct, cleanup
78  void selectCandidates();
79  void createNuclei();
80  void removeNucleons();
81 
82  // Do combinatorics of given nucleons to make candidates
83  void tryClusters(size_t idx1, size_t idx2);
84  void tryClusters(size_t idx1, size_t idx2, size_t idx3);
85  void tryClusters(size_t idx1, size_t idx2, size_t idx3, size_t idx4);
86 
87  // Create cluster candidate with listed indices
88  void fillCluster(size_t idx1, size_t idx2);
89  void fillCluster(size_t idx1, size_t idx2, size_t idx3);
90  void fillCluster(size_t idx1, size_t idx2, size_t idx3, size_t idx4);
91 
92  // Convert cluster to hash index (for combinatoric reduction)
93  size_t clusterHash(const ClusterCandidate& clus) const;
94 
95  // Check if candidate cluster has already been evaluated
96  bool clusterTried(const ClusterCandidate& clus) const {
97  return triedClusters.find(clusterHash(clus)) != triedClusters.end();
98  }
99 
100  // Check if indexed nucleon is already in a cluster
101  bool nucleonUsed(size_t idx) const {
102  return usedNucleons.find(idx) != usedNucleons.end();
103  }
104 
105  // Evaluate conditions for cluster to form light ion
106  bool allNucleons(const ClusterCandidate& clus) const;
107  bool goodCluster(const ClusterCandidate& clus) const;
108  G4int clusterType(const ClusterCandidate& aCluster) const;
109 
110  // Extract hadron from final state list
111  const G4InuclElementaryParticle& getHadron(size_t idx) const {
112  return (*thisHadrons)[idx];
113  }
114 
115  // Convert candidate nucleon set into output nucleus (true == success)
116  bool makeLightIon(const ClusterCandidate& aCluster);
117 
118  // Kinematics for cluster evaluations
119  G4LorentzVector getClusterMomentum(const ClusterCandidate& aCluster) const;
120  mutable G4LorentzVector pCluster; // Reusable buffer to reduce churn
121 
122  G4double maxDeltaP(const ClusterCandidate& aCluster) const;
123 
124  // Report cluster arguments for validation
125  void reportArgs(const G4String& name, const ClusterCandidate& clus) const;
126  void reportResult(const G4String& name, const G4InuclNuclei& nucl) const;
127 };
128 
129 #endif /* G4CASCADE_COALESCENCE_HH */
static const G4double dpMaxTriplet
bool allNucleons(const ClusterCandidate &clus) const
void setVerboseLevel(G4int verbose)
size_t clusterHash(const ClusterCandidate &clus) const
G4String name
Definition: TRTMaterials.hh:40
std::vector< size_t > ClusterCandidate
std::set< size_t > triedClusters
G4double maxDeltaP(const ClusterCandidate &aCluster) const
bool makeLightIon(const ClusterCandidate &aCluster)
std::set< size_t > usedNucleons
int G4int
Definition: G4Types.hh:78
void reportArgs(const G4String &name, const ClusterCandidate &clus) const
bool goodCluster(const ClusterCandidate &clus) const
std::vector< ClusterCandidate > allClusters
const std::vector< G4InuclElementaryParticle > * thisHadrons
G4CollisionOutput * thisFinalState
const G4InuclElementaryParticle & getHadron(size_t idx) const
bool nucleonUsed(size_t idx) const
G4int clusterType(const ClusterCandidate &aCluster) const
void reportResult(const G4String &name, const G4InuclNuclei &nucl) const
bool clusterTried(const ClusterCandidate &clus) const
static const G4double dpMaxAlpha
G4CascadeCoalescence(G4int verbose=0)
void tryClusters(size_t idx1, size_t idx2)
ClusterCandidate thisCluster
void FindClusters(G4CollisionOutput &finalState)
double G4double
Definition: G4Types.hh:76
static const G4double dpMaxDoublet
G4LorentzVector getClusterMomentum(const ClusterCandidate &aCluster) const
CLHEP::HepLorentzVector G4LorentzVector
void fillCluster(size_t idx1, size_t idx2)