Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10731739 | Radiation Measurements | 2005 | 5 Pages |
Abstract
In this paper TL studies of Dy3+ doped SrB4O7 compound are reported by β-ray irradiation for the first time. The polycrystalline powder samples of dysprosium doped SrB4O7:Dy phosphor were prepared by a solid-state reaction in air at high temperature and the TL glow curves and TL emission spectrum after β-ray irradiation was studied from 50 to 250 kGy dose range. The TL studies of Sr0.93Dy0.07B4O7 sample show main TL glow peak at 497 K, and the 497 K glow peak show great stability for a long time. The trap parameters namely activation energy (E), order of kinetics (b), and frequency factor (s) of main peak of the Sr0.93Dy0.07B4O7 sample at 497 K were determined using glow curve shape (Chen's) methods. The TL emission bands at about 480, 575, 660 and 750 nm of the SrB4O7:Dy phosphor is attributed to the characteristic emission from f-f transitions of Dy3+ ion. The distributions of trap produced by the irradiation of β-ray can be altered greatly by the change of the concentrations of Dy3+ ion doped in SrB4O7 host and, all peak temperatures shift to higher temperature, this will be favorable for TL output. The TL-dose response of the SrB4O7:Dy polycrystalline powder sample to β-ray radiation in the range from 50 to 250 kGy for radiation processing dose levels is almost linearity. The experiment results showed that SrB4O7:Dy potential use as the materials of β-ray thermoluminescence dosimeter (TLD) for radiation processing dosimetry.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
J. Li, J.Q. Hao, C.Y. Li, C.X. Zhang, Q. Tang, Y.L. Zhang, Q. Su, S.b. Wang,