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Thermoluminescence and photoluminescence study of Ba 0.97 Ca 0.03 SO 4 : Eu

2006; Institute of Physics; Volume: 39; Issue: 9 Linguagem: Inglês

10.1088/0022-3727/39/9/013

1361-6463

S.P. Lochab, P.D. Sahare, R.S. Chauhan, Numan Salah, Anant Pandey,

Advanced Chemical Physics Studies

A highly sensitive thermoluminescence (TL) phosphor based on Ba1−xCaxSO4 : Eu (0 ≤ x ≤ 1) has been prepared using the chemical co-precipitation technique. It has been found that the TL sensitivity of the material changes on varying the value of x with the maximum coming at x = 0.03. For this value of x the sensitivity is even more than that of the commercially available phosphor CaSO4 : Dy (~2.3 times more). Photoluminescence (PL) and XRD studies of the material show that the maximum TL sensitivity obtained at x = 0.03 is due to the conversion of Eu3+ to Eu2+ being highest in this case. Moreover, the phosphor Ba0.97Ca0.03SO4 : Eu has a constant glow curve shape and a linear gamma-ray dose response over the range 0.1–50 Gy which makes it suitable for radiation dosimetry.