Thermoluminescence and opitical absorption of BaF2 crystals |
| |
| Authors: | G. M. Ferraz M. Matsuoka S. Watanabe C. M. Sunta G. V. S. G. Acharyalu R. V. Srikantaiah |
| |
| Affiliation: | 1. Nuclear Physics Department Institute of Physics , University of ?To Paulo , Cx. P. 66318, CEP:05315-970, S?o, Paulo, SP, Brazil;2. Technical Physics Division , Bhabha Atomic Research Centre , Mumbai, India |
| |
| Abstract: | Abstract Nominally pure and Dy-doped BaF2 crystals were investigated concerning their optical absorption (OA) and thermoluminescence (TL) properties. Peaks at 120—150 and 200°C were observed for a heating rate of 1.7°C/s. The TL response for γ-rays and the TL emission spectra were obtained for these peaks. Except for the purest crystal, all BaF2 crystals produced OA bands before irradiation typical of Ce3+ ions. After irradiation, Dy doped crystals showed bands due to Dy2+ ions. A nominally pure sample gave bands related to Ce2+ ions and photochromic centers of Ce3+ ions. and photochromic centres of Ce3+ ions. The correlation between some OA bands and TL peaks is discussed. |
| |
| Keywords: | BaF2 BaF2 Ce Optical absorption Thermoluminescence |
|
|
