Title of article
Improvement of optical properties and radiation hardness of NaBi(WO4)2 Cherenkov crystals
Author/Authors
Zadneprovski، نويسنده , , B.I and Nefedov، نويسنده , , V.A. and Polyansky، نويسنده , , E.V and Devitsin، نويسنده , , E.G. and Kozlov، نويسنده , , V.A. and Potashov، نويسنده , , S.Y. and Terkulov، نويسنده , , A.R، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2002
Pages
7
From page
355
To page
361
Abstract
On the basis of the data on melt evaporation while growing NaBi(WO4)2 Cherenkov crystals, the formation of nonstoichiometry and most probable types of dot defects of the crystals have been considered. The influence of melt nonstoichiometry and doping with Sc on optical transmission and radiation hardness of the crystals has been experimentally investigated. The surplus of WO3 has been established to increase optical transmission and radiation hardness and lack of Bi2O3 in the melt to reduce radiation hardness. Sc doping is shifting the absorption edge to UV region by 30–35 nm and is increasing radiation hardness of the crystals about three-fold. Analytical estimations give the increase of the number of Cherenkov photons by a factor of 1.3, which leads to an improvement of the energy resolution of a calorimeter based on NaBi(WO4)2:Sc crystals compared with undoped NaBi(WO4)2 of approximately 15%.
Keywords
Nonstoichiometry , Double sodium–bismuth tungstate , Defects , Transmission , Radiation hardness
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Serial Year
2002
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Record number
2196662
Link To Document