Semiempirical Efficiency Calibration in Semiconductor HPGe Gamma-Ray Spectroscopy

Table 2

List of reference materials prepared in the laboratory and used for comparison between the calculated and experimental efficiency.

Matrix material	Chemical composition	Density (g/cm^3)	Measurement geometry
Charcoal	C (100%)	0.486	Cylinder, volume 100 ml
		0.454	Cylinder, volume 200 ml
Soil	SiO2 (90.00%); K (4.00%); Fe (1%); C (4.00%); Others (1%)	1.381	Cylinder, volume 100 ml
		1.426	Cylinder, volume 200 ml
Sand	SiO2 (100%)	1.591	Cylinder, volume 100 ml
		1.556	Cylinder, volume 200 ml
		1.9	Marinelli beaker, volume 0.5 l
Mineralized grass	C (99%); Others (1%)	0.300	Cylinder, volume 100 ml
		0.256	Cylinder, volume 100 ml
Water	H2O (100%)	1.012	Cylinder, volume 125 ml
		1.011	Cylinder, volume 250 ml
Aerosol	SO4 (15%); NH4 (15%); NO3 (15%); CH (50%); Others (5%)	0.572	Vial, volume 50 ml