Thermally stimulated luminescence and EPR studies on topaz

被引：9

作者：

Souza, Divanizia N. ^{[1
]}

Fernandes de Lima, Jose

Valerio, Mario Ernesto G.

Caldas, Linda V. E.

机构：

[1] Univ Fed Sergipe, Dept Educ, CECH, BR-49100000 Aracaju, SE, Brazil

[2] Univ Fed Sergipe, Dept Fis, CCET, BR-49100000 Aracaju, SE, Brazil

[3] IPEN CNEN SP, BR-05508000 Sao Paulo, Brazil

来源：

APPLIED RADIATION AND ISOTOPES | 2006年 / 64卷 / 08期

关键词：

topaz; thermoluminescence; EPR;

D O I：

10.1016/j.apradiso.2006.03.006

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In the present work, electron paramagnetic resonance (EPR) spectra and thermoluminescence (TL) emission of colourless natural topaz from Santo Antonio do Jacinto, Brazil, was studied as a function of thermal treatment and gamma irradiation dose, focussing on the use of this material as a radiation dosimeter. EPR measurements on "as-received" samples at room temperature provided signals in the region of about 500 at 5000 G. The signal located around g congruent to 2, frequently attributed to (AlO4), increased with additional gamma dose and disappeared after thermal treatment at 500 C for 1 h. Irradiation after thermal treatment recovered this signal. The decay promoted by isochronal thermal treatment showed the (AlO4) defects to be directly related to the TL glows peaks. The variation of EPR spectrum with annealing temperature prior to irradiation showed that the variation of TL sensitivity is a consequence of the variation of the (AlO4) population. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：906 / 909

页数：4

共 13 条

[1]

AZORIN NJ, 1982, HEALTH PHYS, V43, P590

[2]

LIMA CAF, 1986, APPL RADIAT ISOTOPES, V37, P135, DOI 10.1016/0883-2889(86)90061-4

[3]

MCKEEVER SWS, 1991, NUCL TRACKS RAD MEAS, V18, P5

[4] THERMOLUMINESCENT PROPERTIES OF TOPAZ [J].

MOSS, AL ;

MCKLVEEN, JW .

HEALTH PHYSICS, 1978, 34 (02) :137-140

[5]

NORTHRUP PA, 1994, AM MINERAL, V79, P401

[6]

PETROV I, 1983, FORTSCHR MINERAL, V61, P171

[7]

RIBBE PH, 1971, AM MINERAL, V56, P24

[8] Radiation-induced charge trapping and recombination process in natural topaz studied by TL, EPR and XRD [J].

Souza, DN ;

de Lima, JF ;

Valerio, MEG ;

Sasaki, JM ;

Caldas, LVE .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2004, 218 :123-127

[9] Influence of thermal treatment on the Raman, infrared and TL responses of natural topaz [J].

Souza, DN ;

de Lima, JF ;

Valerio, MEG ;

Fantini, C ;

Pimenta, MA ;

Moreira, RL ;

Caldas, LVE .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2002, 191 :230-235

[10] Thermoluminescence of natural topaz crystals of differing genesis [J].

Souza, DN ;

deLima, JF ;

Valerio, MEG .

PROCEEDINGS OF THE 13TH INTERNATIONAL CONFERENCE ON DEFECTS IN INSULATING MATERIALS - ICDIM 96, 1997, 239-2 :765-768

← 1 2 →