Lithium calcium borate （LiCaBO3） polycrystalline thermoluminescence （TL） phosphor doped with rare earth （Tb3＋ and Dy3＋） elements was synthesized by novel solution combustion synthesis. The reaction produced ve...Lithium calcium borate （LiCaBO3） polycrystalline thermoluminescence （TL） phosphor doped with rare earth （Tb3＋ and Dy3＋） elements was synthesized by novel solution combustion synthesis. The reaction produced very stable crystalline LiCaBO3：D（D=Tb3＋ and Dy3＋） phosphors. These rare earth doped phosphors material showed maximum TL sensitivity with favorable glow curve shape. TL glow curve of X-ray irradiated that LiCaBO3：Tb3＋ and LiCaBO3：Dy3＋ samples showed two major well-separated glow peaks. The TL sensitivity of these phosphors to X-ray radiation was comparable with that of TLD-100（Harshaw）. Photoluminescence spectra of LiCaBO3：Tb3＋ and LiCaBO3：Dy3＋ showed the characteristic Tb3＋ and Dy3＋ peaks respectively. TL response to X-ray radiation dose was linear up to 25 Gy.展开更多
The thermoluminescence （TL） and photohmainescence （PL） properties of the phosphor NaSrBO3：Tb3＋ were reported and discussed. The combustion technique was used for the synthesis of polycrystalline samples of NaSr...The thermoluminescence （TL） and photohmainescence （PL） properties of the phosphor NaSrBO3：Tb3＋ were reported and discussed. The combustion technique was used for the synthesis of polycrystalline samples of NaSrBO3：Th3＋. The TL glow curve of the compound had a simple structure with a single peak at 434 K. TL sensitivity of the phosphor was found to be more than that of （LiF：Mg,Cu,P）. The TL glow curve was studied as a function of concentration of dopant and dose of gamma ray irradiation. The kinetic parameters of the thermolumines- cence of NaSrBO3： Tb3＋were calculated employing the peak shape method. The photoluminescence （PL） properties of Tb3＋ doped in NaS- rBO3 were studied over the 200-400 nm excitation range. The excitation spectra of NaSrBO3：Tb3＋ consisted of single narrow band peaking at about 236 nm. The emission spectra monitored at 236 nm excitation consisted of a series of sharp lines peaking at 489, 544, 586 and 622 nm corresponding to the 5D4→7Fj （j=3,4,5,6） transitions within the 4f8 configurations of Tb3＋.展开更多
基金Project supported by University Grant Commission, New Delhi (UGC/F.1/37-332/2009(SR))
文摘Lithium calcium borate （LiCaBO3） polycrystalline thermoluminescence （TL） phosphor doped with rare earth （Tb3＋ and Dy3＋） elements was synthesized by novel solution combustion synthesis. The reaction produced very stable crystalline LiCaBO3：D（D=Tb3＋ and Dy3＋） phosphors. These rare earth doped phosphors material showed maximum TL sensitivity with favorable glow curve shape. TL glow curve of X-ray irradiated that LiCaBO3：Tb3＋ and LiCaBO3：Dy3＋ samples showed two major well-separated glow peaks. The TL sensitivity of these phosphors to X-ray radiation was comparable with that of TLD-100（Harshaw）. Photoluminescence spectra of LiCaBO3：Tb3＋ and LiCaBO3：Dy3＋ showed the characteristic Tb3＋ and Dy3＋ peaks respectively. TL response to X-ray radiation dose was linear up to 25 Gy.
文摘The thermoluminescence （TL） and photohmainescence （PL） properties of the phosphor NaSrBO3：Tb3＋ were reported and discussed. The combustion technique was used for the synthesis of polycrystalline samples of NaSrBO3：Th3＋. The TL glow curve of the compound had a simple structure with a single peak at 434 K. TL sensitivity of the phosphor was found to be more than that of （LiF：Mg,Cu,P）. The TL glow curve was studied as a function of concentration of dopant and dose of gamma ray irradiation. The kinetic parameters of the thermolumines- cence of NaSrBO3： Tb3＋were calculated employing the peak shape method. The photoluminescence （PL） properties of Tb3＋ doped in NaS- rBO3 were studied over the 200-400 nm excitation range. The excitation spectra of NaSrBO3：Tb3＋ consisted of single narrow band peaking at about 236 nm. The emission spectra monitored at 236 nm excitation consisted of a series of sharp lines peaking at 489, 544, 586 and 622 nm corresponding to the 5D4→7Fj （j=3,4,5,6） transitions within the 4f8 configurations of Tb3＋.
