GPS Command Example 17:

/gps/particle geantino
/gps/pos/type Volume
/gps/pos/shape Sphere
/gps/pos/centre 0. 0. 5. cm
/gps/pos/radius 10 cm
/gps/pos/confine aSphere_P2
/gps/ang/type iso
/gps/ene/type Exp
/gps/ene/min 2. MeV
/gps/ene/max 10. MeV
/gps/ene/ezero 1.

Resulted Distribution Plots: