The structure of Tb:Mo:PbWO4 crystals was investigated by Raman spectra and the results showed that the spectra were varied differently by doping dopants in different ranges of shift. Rotation-vibration, curving-vibration and non-symmetrical stretching-vibration had been investigated on the spectra. Rotation-vibration intensity of [WO4]2- group is weakened and curving-vibration intensity is undergirded; low Mo6+ doping enhances the intensity of non-symmetrical stretching-vibration, with the concentration of Mo6+ increasing, the intensity is weakened. So it could be inferred that Tb3+ ion replaced the vacancy of Pb, when achieving at a certain concentration, Tb3+ ion would substitute for the lattice of Pb2+, Mo6+ ion would substitute for W lattice and generate [MoO4]2- new group, these are the main reason for the properties changing. Furthermore it could suggest that the impurity ions doped in tetrahedral positions, strongly affect the electron-phonon coupling in [WO4]2-, which makes the intensities of the vibration changed regularly.
参考文献
| [1] | CMS Electromagnetic calorimeter-Technical Design Report[R].Geneve:CERN,1997-12-14. |
| [2] | Zhang Xin;Liao Jingying;Li Peijun;Yuan Hui Sheng Binfu Shao Peifa Yin Zhiwen .Low dose rate irradiation behaviors of Y3+-doped PbWO4 crystals[J].Nuclear Instruments and Methods in Physics Research A:Accelerators,Spectrometers,Detectors and Associated Equipment,2002,486:362. |
| [3] | Bohacek P;Nikl M .Annealing induced absorption phenomena in PbWO4[J].Nuclear Instruments and Methods in Physics Research A:Accelerators,Spectrometers,Detectors and Associated Equipment,2005,537:86. |
| [4] | Pejchal J;Bohacek P;Nikl M;Mucka V;Pospisil M;Kobayashi A;Usuki Y .Radiation damage of doubly doped PbWO4 : (Mo,A(3+)) scintillator[J].Radiation measurements,2004(4-6):385-388. |
| [5] | Groening J A;Blasse G .Some new observations on the luminescence of PbMO4[J].Journal of Solid State Chemistry,1980,32:9. |
| [6] | Pazzi GP.;Fabeni P.;Nikl M.;Bohacek P.;Mihokova E.;Vedda A.;Martini M.;Kobayashi M.;Usuki Y. .Delayed recombination luminescence in lead tungstate (PWO) scintillating crystals[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2003(0):791-796. |
| [7] | Annenkov A.;Hofstaetter A.;Korzhik M.;Ligun V.;Lecoq P.;Missevitch O.;Novotny R.;Peigneux JP.;Borisevitch A. .Improved light yield of lead tungstate scintillators[J].Nuclear Instruments and Methods in Physics Research, Section A. Accelerators, Spectrometers, Detectors and Associated Equipment,2000(1):71-74. |
| [8] | Xu Shulian;Li Jianli;Guan Xiaoxian;Sun Jing Zhang Liang Zhu Zhongli Zhang Jiaguo Liu Jinghe .Growth techique of sodium bismuth tungstate crystal doped by Nd[J].Journal of Rare Earths,2003,21:90. |
| [9] | Baccaro S.;Borgia B.;Castelli F.;Cavallari F.;Dafinei I. Denotaristefani F.;Diemoz M.;Festinesi A.;Leonardi E.;Longo E. Montecchi M.;Organtini G.;Barone LM. .ORDINARY AND EXTRAORDINARY COMPLEX REFRACTIVE INDEX OF THE LEAD TUNGSTATE (PBWO4) CRYSTAL[J].Nuclear Instruments and Methods in Physics Research, Section A. Accelerators, Spectrometers, Detectors and Associated Equipment,1997(2):209-214. |
| [10] | Basiev T T;Sobol A A;Voronko Yu K;Zverev P G .Spontaneous Raman spectroscopy of tungstate and molybdate crystals for Raman lasers[J].Optical Materials,2000,15:205. |
| [11] | Huang Yanlin;Seo Hyo Jin;Feng Qiang;Yuan Shouhua .Effects of trivalent rare-earth ions on spectral properties of PbWO4 crystals[J].Materials Science and Engineering B,2005,121:103. |
| [12] | Basiev T T;Sobol A A;Voronko Yu K;Zverev P G .Spontaneous raman spectroscopy of tungstate and molybdate crystals for Raman lasers[J].Optical Materials,2000,15:205. |
| [13] | Frost Ray L;Duong Loc;Weier Matt .Raman micros copy of selected tungstate minerals[J].Spectrochimica Acta Part A:Molecular and Biomolecular Spectroscopy,2004,60:1853. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%