Evaluated Eta Photoproduction Cross Section Data Directory
McNicoll ea PhysRevC82:035208,2010
==============================================
Authors A.Afanasev, W.Briscoe, and I.Strakovsky
        (revison 28 May 2012)

Evaluated cross section data for pion photoproduction

-- gp_etap.dat - gp-->etap

Add data format is G4VPhysicsVector compatible

Kinetic energy in MeV and cross section in microbarns
