Similarities in glow peak positions and kinetics parameters of oxyorthosilicates: evidence for unique intrinsic trapping sites

被引：35

作者：

Cooke, DW ^{[1
]}

Bennett, BL ^{[1
]}

McClellan, KJ ^{[1
]}

Roper, JM ^{[1
]}

Whittaker, MT ^{[1
]}

机构：

[1] Univ Calif Los Alamos Natl Lab, Mat Sci & Tech Div, Los Alamos, NM 87545 USA

来源：

JOURNAL OF LUMINESCENCE | 2000年 / 92卷 / 1-2期

关键词：

thermally stimulated luminescence; defects; oxyorthosilicates;

D O I：

10.1016/S0022-2313(00)00235-0

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Thermally stimulated luminescence measurements on cerium-doped M2SiO5 (M = Lu, Y, Yb, Er) and undoped Lu2SiO5, each possessing monoclinic C2/c crystal symmetry, reveal common glow peaks with the principal one occurring near 375 K. In contrast, cerium-doped Gd2SiO5, characterized by the monoclinic P2(1)/c structure, exhibits a different glow curve with the principal peak occurring near 425 K. Although undoped Lu2SiO5 Shares the characteristic Ce-doped M2SiO5 glow curve, emission spectra data show that it emits weak line-emission, whereas the cerium-doped materials are characterized by the intense Ce3+ band spectrum. This suggests a common and unique trapping site whose formation does not require the presence of cerium. Application of peak-shape glow curve analysis shows that the characteristic peak near 375 K in each sample obeys first-order kinetics with thermal activation energy approx. 1 eV and frequency factor similar to 10(14)s(-1) Based on these results, we suggest that the characteristic glow peak is intrinsic and independent of cerium doping. This unique defect is common to the C2/c-structured oxyorthosilicates and is related to the host metal-ion-ligand configuration. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：83 / 89

页数：7

共 18 条

[11] Ce-doped scintillators: LSO and LuAP [J].

Lempicki, A ;

Glodo, J .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1998, 416 (2-3) :333-344

[12] Czochralski growth and characterization of (Lu1-xGdx)(2)SiO5 single crystals for scintillators [J].

Loutts, GB ;

Zagumennyi, AI ;

Lavrishchev, SV ;

Zavartsev, YD ;

Studenikin, PA .

JOURNAL OF CRYSTAL GROWTH, 1997, 174 (1-4) :331-336

[13] A PROMISING NEW SCINTILLATOR - CERIUM-DOPED LUTETIUM OXYORTHOSILICATE [J].

MELCHER, CL ;

SCHWEITZER, JS .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1992, 314 (01) :212-214

[14]

MERENGA H, 1997, ELECT STRUCTURE CALC

[15]

Shul'gin B. V., 1996, Technical Physics Letters, V22, P197

[16]

SMOLIN YI, 1969, SOV PHYS CRYSTALLOGR, V14, P14

[17] LIGHT-EMISSION MECHANISM OF LU2(SIO4)O-CE [J].

SUZUKI, H ;

TOMBRELLO, TA ;

MELCHER, CL ;

SCHWEITZER, JS .

IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 1993, 40 (04) :380-383

[18] Development of inorganic scintillators [J].

vanEijk, CWE .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1997, 392 (1-3) :285-290

← 1 2 →