Characterization of TL and CW-OSL signals of natural brazilian topaz with different colours

Matheus Fernando dos santos; Leonardo  Bruno Ferreira de Souza; Viviane  Khoury Asfora; Álvaro Barbosa de Carvalho Júnior; Vinicius Saito Monteiro de Barros; Pedro Luiz Guzzo; Helen Jamil Khoury

doi:10.15392/bjrs.v9i1A.1310

Authors

Matheus Fernando dos santos DEN/UFPE – Department of Nuclear Energy, Federal University of Pernambuco https://orcid.org/0000-0003-0477-249X
Leonardo Bruno Ferreira de Souza
Viviane Khoury Asfora
Álvaro Barbosa de Carvalho Júnior
Vinicius Saito Monteiro de Barros
Pedro Luiz Guzzo
Helen Jamil Khoury

DOI:

https://doi.org/10.15392/bjrs.v9i1A.1310

Keywords:

Brazilian topaz, different colours, thermoluminescence (TL), optically stimulated luminescence (OSL).

Abstract

Topaz [Al₂SiO₄(OH,F)₂] is usually found in nature and can presents different colours. The aim of this paper is to evaluate the thermoluminescence (TL) and the optically stimulated luminescence (OSL) response of five types of topaz collected from three different Brazilian states. The topaz samples studied have a yellow, blue and colourless coloration. The TL results showed that colourless samples from the state of Rio Grande do Norte present a TL glow curve with a main peak at ~260ºC. The others colourless topaz from Teofilo Otoni e Mato Grosso do Sul, besides the peak of ~260ºC, the present another peak at 160 ºC. The highest TL intensity was observed with the colourless topaz from RN. A linear TL dose curve response was also observed with these samples from the gamma radiation of ⁶⁰Co in the range of 0.01 Gy to 3.5 Gy. The blue light stimulation (BSL) showed almost the same intensity response for the three colourless topaz samples. None topaz sample showed response to optical infrared stimulation (IRSL).

Views: 203
pdf Downloads: 141

Downloads

Download data is not yet available.

Author Biography

Matheus Fernando dos santos, DEN/UFPE – Department of Nuclear Energy, Federal University of Pernambuco

physics

References

K. Nassau. Altering the color of topaz. Gems & Gemology, v. 21(1), pp. 26-34 (1995).

B. Wunder, D. C. Rubie, C. R. Ross II, O. Medenbach, F. Seifert, W. Schreyer. Synthesis, stability and proprieties of Al2SiO4(OH)2: A fully hydrated analogue of topaz. American Mineralogist, v . 78, pp. 285-297 (1993).

D. N. Souza, J. F. Lima, M. E. G. Valerio, J. M. Sasaki, L. V. E. Caldas. Radiation-induced charge trapping and recombination process in natural topaz studied by TL, EPR and XRD. Nuclear Instruments and Methods in Physics Research, v. 218, pp. 123-127 (2004).

E. G. Yukihara. Desvendando a cor e a Termoluminescência do topázio. Tese de doutorado Universidade de São Paulo (2001).

A. M. Wise. Topaz: A Mineralogical Review. Rocks Minerals, v. 70 pp. 16-25 (1995).

A. L., Moss, J. W., McKlveen. Thermoluminescence proprieties of topaz. Health Physics, v. 34, 137–140 (1978).

Azorin, J., Salvi, R., Gutierrez, P. C. A. Some minerals as TL dosimeters. Health Physics, v. 43, 590–595 (1982).

D. N. Souza, J. F. Lima, M. E. G. Valerio. Thermoluminescence of Brazilian Topaz. Radiation effects and defects in Solid, v. 135, pp. 109-113 (1995).

L. Camargo, E.Trujillo-Vasquez, M. I. PEch-Canul, J. Marcazzo. OSL dosimetric proprieties of synthetic topaz. Radiation Measurements, v.107, pp. 23-26 (2017).

D. N. Souza, J. F. Lima, M. E. G. Valerio, L. V. E. Caldas. Thermally stimulated luminescence and EPR studies on topaz. Applied Radiation and Isotopes, v. 64, pp. 906-909 (2006).

McKEEVER, S. W. S. Mechanisms of thermoluminescence production: some problems and a few answers. Nuclear tracks radiation measurements, v. 18, pp. 5 - 12 (1991).

E. G. Yukihara, E. Okuno. On the thermoluminescent proprieties and behavior of Brazilian topaz. Nuclear Instruments and Methods in Physics Research, v. 141, pp. 514-517 (1998).

D. N. Souza, J. F. Lima, M. E. G. Valerio, L. V. E. Caldas. Performance of pellets and composites of natural colourless topaz as radiation dosemeters. Radiation Protection Dosimetry, v. 100, pp 413-416 (2002).