LAC	Linear attenuation coefficient	diff (%)	The difference between simulated and computed values of MAC
I	Incoming intensity	Zeff	Effective atomic number
Io	Transmitted intensity	Zeq	Equivalent atomic number
MAC	Mass attenuation coefficient	EBF	Exposure buildup factor
TF	Transmission factor	EABF	Energy absorption buildup factor
HVL	Half-Value layer	PD	Penetration depth
ρ	Density of the examined material
ΣR	Neutron cross-section