Positron lifetime studies of CaSO4: Dy thermoluminescence phosphors

被引：0
|
作者：
Annalakshmi, O. [1 ]
Chirayath, Varghese Anto [1 ]
Babu, S. Hari [1 ]
Jose, M. T. [1 ]
Amarendra, G. [1 ]
机构：
[1] Indira Gandhi Ctr Atom Res, Kalpakkam 603102, Tamil Nadu, India
来源：
PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 6, NO 11 | 2009年 / 6卷 / 11期
关键词：
MECHANISMS;
D O I：
10.1002/pssc.200982104
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Positron lifetime studies have been carried out an CaSO4:Dy phosphors with and without Teflon binder. The effect of Co-60 gamma irradiation exposure in these samples has been investigated. Unexpected CaSo(4):Dy embedded Teflon discs exhibited four lilfetime components viz. 228, 755, 3865 and 77 ps with intensities of 62%, 18%, 14% and 6% respectively. Since Teflon is used as a binder in these phosphors, the long lived components are understood to arise from this Upon radiation exposure there is a clear change in these resolved lifetime components. To understand the variation of these lifetime xomponents better, positron lifetime studies was carried out on pure CaSO4:Dy powder (without Teflon) as well as pure Teflon discs exposed to varying radiation doses. The variation of positron lifetime parameters of CaSO4:Dy powder showed systematics, ascribabic to SO4 ion formation due to gamma-ray exposure. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码：2516 / 2518
页数：3
相关论文
共 50 条
  • [31] Advances in the synthesis of new Europium doped CaSO4 phosphors and their thermoluminescence characterization
    Bernal, R.
    Garcia-Haro, A. R.
    Machi, L.
    Brown, F.
    Perez-Salas, R.
    Castano, V. M.
    Cruz-Vazquez, C.
    RADIATION MEASUREMENTS, 2008, 43 (2-6) : 371 - 374
  • [32] X-RAY INDUCED THERMOLUMINESCENCE IN CaSO4: Sm PHOSPHORS.
    Sabnis, S.G.
    Pawar, S.H.
    Indian Journal of Pure and Applied Physics, 1980, 18 (08): : 562 - 567
  • [33] Study of Residual TL of CaSO4:Dy-based Thermoluminescence Dosemeter
    Sahai, Manish K.
    Pradhan, S. M.
    Bakshi, A. K.
    Datta, D.
    RADIATION PROTECTION DOSIMETRY, 2017, 177 (03) : 342 - 347
  • [34] TL and PL studies on CaSO4:: Dy nanoparticles
    Salah, N
    Sahare, PD
    Lochab, SP
    Kumar, P
    RADIATION MEASUREMENTS, 2006, 41 (01) : 40 - 47
  • [35] Influence of Li dopants on thermoluminescence spectra of CaSO4 doped with Dy or Tm
    Wang, Y.
    Can, N.
    Townsend, P. D.
    JOURNAL OF LUMINESCENCE, 2011, 131 (09) : 1864 - 1868
  • [36] Thermoluminescence of undoped and Dy-doped CaSO4: Influence of the preparation methods
    Gerome, V
    Iacconi, P
    Lapraz, D
    Prevost, H
    Baumer, A
    RADIATION PROTECTION DOSIMETRY, 1996, 65 (1-4) : 309 - 312
  • [37] Cathodoluminescence and green-thermoluminescence response of CaSO4:Dy,P films
    Roman-Lopez, J.
    Correcher, V.
    Garcia-Guinea, J.
    Rivera, T.
    Lozano, I. B.
    JOURNAL OF LUMINESCENCE, 2013, 135 : 89 - 92
  • [38] Ultraviolet and laser radiation dosimetry using phototransferred thermoluminescence in CaSO4:Dy
    Potiens, AJ
    Campos, LL
    RADIATION PROTECTION DOSIMETRY, 1996, 66 (1-4) : 95 - 96
  • [39] Thermoluminescence studies of CaSO4:Dy,P,Si phosphor under X-ray irradiation
    Nair, Resmi G.
    Madhukumar, K.
    Nair, C. M. K.
    Jayasudha, S.
    Anandakumar, V. M.
    Elias, T. S.
    Komath, Manoj
    CERAMICS INTERNATIONAL, 2018, 44 (03) : 3492 - 3496
  • [40] Thermoluminescence studies of CaSO4: Eu nanophosphor for electron dosimetry
    Mandlik, Nandkumar
    Bhoraskar, V. N.
    Patil, B. J.
    Dahiwale, S. S.
    Sahare, P. D.
    Dhole, S. D.
    INDIAN JOURNAL OF PURE & APPLIED PHYSICS, 2017, 55 (06) : 413 - 419
12345