Author/Authors :
Kobayashi، نويسنده , , M and Usuki، نويسنده , , Y and Ishii، نويسنده , , M and Senguttuvan، نويسنده , , N and Tanji، نويسنده , , K and Chiba، نويسنده , , M and Hara، نويسنده , , K and Takano، نويسنده , , H and Nikl، نويسنده , , M and Bohacek، نويسنده , , P and Baccaro، نويسنده , , S and Cecilia، نويسنده , , A and Diemoz، نويسنده , , M، نويسنده ,
Abstract :
Doping by different trivalent ions (La3+, Lu3+, Gd3+, Y3+, Sc3+) was systematically studied in PbWO4 crystals in the same way, using raw material from the same source. The result was compared with an undoped sample (actually a Pb-rich one) and samples doped with divalent (Cd2+) and pentavalent (Nb5+) ions. All the trivalent ions but Sc3+ gave a significant improvement in transmittance in the short wavelength region (330–450 nm) and in radiation hardness. Among all the tested dopants, Y3+ and Gd3+ showed the best result; these dopants may be worth further studies, since they have another advantage of the segregation coefficient close to unity.
