A study on colouration and axial variation of composition in the single crystal of lead tungstate grown by Czochralski technique

被引：5

作者：

Bhaumik, Indranil ^{[1
]}

Ganesamoorthy, S. ^{[1
]}

Karnal, A. K. ^{[1
]}

Wadhawan, V. K. ^{[1
]}

机构：

[1] Ctr Adv Technol, Laser Mat Div, Crystal Growth Lab, Indore 452013, India

来源：

JOURNAL OF CRYSTAL GROWTH | 2005年 / 275卷 / 1-2期

关键词：

Defects; Czochralski method; Tungstates; Scintillator materials;

D O I：

10.1016/j.jcrysgro.2004.11.121

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

A thorough study reveals the importance of a proper synthesis condition in the growth of colour-free lead tungstate single crystals. An optimised synthesis scheme is described. The temperature gradient required, above the melt, for the growth of crack-free crystals is 25 degrees C/cm. Differential thermal analysis shows that an improper synthesis results in a compositional variation along the vertical axis of the crystal. UV-visible absorption detects an enhanced absorption in the wavelength, 380-450 nm for the pale yellow-coloured crystals. Annealing in air for 15 h at 1050 degrees C removes the special blue absorption in the coloured crystal. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：E839 / E842

页数：4

共 6 条

[1] Lead tungstate scintillation material [J].

Annenkov, AA ;

Korzhik, MV ;

Lecoq, P .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2002, 490 (1-2) :30-50

[2] Optical, thermal and defect studies on PbWO4 single crystals grown by the Czochralski method [J].

Ganesamoorthy, S ;

Bhaumik, I ;

Karnal, AK ;

Wadhawan, VK .

JOURNAL OF CRYSTAL GROWTH, 2004, 264 (1-3) :320-326

[3] Effects of pre-anneal treatment on the optical characteristics of lead tungstate single crystal [J].

Kim, DH ;

Yang, HS ;

Chang, KD ;

Park, HY ;

Lee, MB ;

Lee, JH ;

Song, YH ;

Cho, YR ;

Lee, SY .

JOURNAL OF CRYSTAL GROWTH, 2001, 226 (01) :117-122

[4] Scintillation and phosphorescence of PbWO4 crystals [J].

Kobayashi, M ;

Ishii, M ;

Harada, K ;

Usuki, Y ;

Okuno, H ;

Shimizu, H ;

Yazawa, T .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1996, 373 (03) :333-346

[5]

Nikl N., 1997, J APPL PHYS, V82, P5758

[6] Growth of lead tungstate single crystal scintillators [J].

Nitsch, K ;

Nikl, M ;

Ganschow, S ;

Reiche, P ;

Uecker, R .

JOURNAL OF CRYSTAL GROWTH, 1996, 165 (1-2) :163-165

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