CoherentElasticHadronNucleus

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Model: G4ElasticHadrNucleusHE

Description:
- Model for coherent elastic hadron-nucleus scattering

Invocation:

G4ElasticHadrNucleusHE* elasticModel = new G4ElasticHadrNucleusHE();
G4HadronElasticProcess* hadElastProc = new G4HadronElasticProcess();
hadElastProc->RegisterMe(elasticModel);
pManager->AddDiscreteProcess(hadElastProc);

NOTE: user must first download high energy elastic data file from Geant4 web page to a local directory, say Elastic/, then
```
setenv G4ELASTICDATA /Elastic 
```

Valid for particles:
- pi+, pi-, K+, K-, proton, neutron,
- lambda, sigma+, sigma-, xi-, xi0, omega-,
- anti-proton, anti-neutron, anti-lambda, anti-sigma+,
- anti-sigma-, anti-xi-, anti-xi0, anti-omega-
Energy range:
- 1 GeV - 300 GeV
Alternate models:
Used in physics lists:
- none