Total SCF Energy of He (Neutral) = -79.11948 eV

Total SCF Energy of He (Cation) = -54.26551 eV

Total SCF Energy of He (Anion) = -77.34709 eV

Ionisation Energy = Total SCF Energy of He (Cation) - Total SCF Energy of He (Neutral)
	          = -54.26551 eV - (-79.11948 eV ) = 24.85397 eV 

Electron Affinity = Total SCF Energy of He (Neutral) - Total SCF Energy of He (Anion) 
		  = -79.11948 eV - ( -77.34709 eV ) = -1.77239 eV 