PbWO4 single crystal, 10 x 10 x 0.4mm, both faces polished.  

     •  Lead tungstate ( PbWO4 ) is a new scintillating crystal discovered in 1990s.
        It is one of the most dense oxide crystal ( 8.3g/cm3), and is distinguished by its
        short radiation length ( 0.9 cm), small Moliere radius ( 2.19cm) and strong irradiation
        hardness.  Its scintillation light output peaks between 450-550nm with a fast component
        decay time in the range from 2-20ns. After irradiation with g-ray, the degradation in the
        optical transmittance is not large up to 106 rad. PbWO4 is considered as a promising
        scintillation material for electromagnetic spectrometer in high energy, nuclear physics
        experiment as well as nuclear medicine.

     •  Main PropertiesCrystal structure: Tetragonal; Space group I 41 /a; Lattice constant (?? )
        a = b = 5.416 , c = 12.049;  Density (g/cm3) 8.28; Radiation length (cm) 0.92; Mole re radius (cm)
        2.19; Decay constant (ns) 6/30; Peak emission (nm): 440/530; Light output (%) 0.5; Index of
        refraction: 2.16; Melting point (oC ) 1123; Hygroscopicity:  No Cleavage (101);  Crystal boule
        size 30 mm in diameter x 100 mm in length