Low Energy or High Precision Neutron Fission

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Model: G4NeutronHPorLFission

Description:
- This model generates the final state for neutron-induced fission using the high precision neutron model when sufficient high precision data is available for the selected element or isotope. When there is insufficient data, neutron-induced fission is performed using the less precise Low Energy Parameterized model.
Invocation:
- ```
G4NeutronHPorLFission* fissionModel = new G4NeutronHPorLFission();
G4HadronFissionProcess* fissionProcess = new G4HadronFissionProcess();
fissionProcess->RegisterMe(fissionModel);
processManager->AddDiscreteProcess(fissionProcess);
```
- NOTE: User must first download high precision neutron data files from Geant4 web page to a local directory, say G4NDL/, then
```
setenv NeutronHPCrossSections /G4NDL
```
- Valid for particles:
  - neutron
- Energy range:
  - 0 - 20 MeV
- Alternate models:
  - G4LFission
  - G4NeutronHPFission
- Used in physics lists:
  - LHEP_HP, LHEP_BERT_HP, LHEP_BIC_HP, LHEP_LEAD_HP,
  - LHEP_PRECO_HP, QGSP_HP, QGSC_LEAD_HP