Thermoluminescent Mechanism in Lilac Spodumene

• Authors: S. Souza , S. Watanabe , A. Lima , M. Lalic
• Languages of publication: EN

Abstracts

EN

In the present work the thermoluminescence of a lilac α-spodumene (LiAlSi_2O_6), a natural mineral from Brazil, was investigated. Toward this aim the gamma irradiation, as well as several heating processes were carried out. The sample presented a glow curve with various thermoluminescence peaks. Emission spectrum showed only one prominent band at 610 nm, which indicates the existence of only one recombination center despite the several thermoluminescence centers exhibited, due to intrinsic defects. Using correlation between thermoluminescence and optical absorption techniques we discuss the effects of gamma radiation and annealing in the lilac spodumene, and conclude that an annealing at about 230ºC can be applied to natural lilac spodumene gems used in jewelry for increment of its lilac color.

Keywords

EN

91.60.-x; 78.60.Kn; 61.72.-y

Discipline

• 91.60.-x: Physical properties of rocks and minerals(for rheological properties of geological materials, see 83.80.Nb)
• 78.60.Kn: Thermoluminescence
• 61.72.-y: Defects and impurities in crystals; microstructure(for radiation induced defects, see 61.80.-x; for defects in surfaces, interfaces, and thin films, see 68.35.Dv and 68.55.Ln; see also 85.40.Ry Impurity doping, diffusion, and ion implantation technology; for effects of crystal defects and doping on superconducting transition temperature, see 74.62.Dh)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2007
• Volume: 112
• Issue: 5
• Pages: 1001-1006

Dates

published

2007-11

received

2007-09-03

Contributors

author

S. Souza

• Department of Physics, Federal University of Sergipe, São Cristóvão, Brazil

author

S. Watanabe

• Department of Nuclear Physics, Institute of Physics, Universidade de São Paulo, São Paulo, Brazil

author

A. Lima

• Department of Physics, Federal University of Sergipe, São Cristóvão, Brazil

author

M. Lalic

• Department of Physics, Federal University of Sergipe, São Cristóvão, Brazil

References

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Identifiers

DOI

10.12693/APhysPolA.112.1001