Thermoluminescence of natural and synthetic diopside

• Published in: Journal of luminescence Vol. 128; no. 7; pp. 1185 - 1190
• Main Authors: Cano, N.F., Yauri, J.M., Watanabe, S., Mittani, J.C.R., Blak, A.R.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.07.2008; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Diopside; EPR; Exact sciences and technology; Linearity; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other luminescence and radiative recombination; Physics; Thermoluminescence; 71.35.Cc; Diopside; 78.60.Kn; EPR; Linearity; 71.70.Ch; Thermoluminescence; Radiation effects; Annealing; Polycrystals; Calcium Magnesium Silicates Mixed; Radiation doses; High temperature; Diopside; EPR; Thermoluminescence; Linearity; Gamma radiation; Temperature effects; Aluminium additions; 78.60.Kn; 71.70.Ch; 71.35.Cc; Electron paramagnetic resonance
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2007.11.090

Diopside, a natural silicate mineral of formula CaMgSi 2O 6, has been investigated concerning its thermoluminescence (TL) and electron paramagnetic resonance (EPR) properties. Glow curves and TL vs. γ-dose were obtained irradiating natural samples to additional dose varying from 50 to 10,000 Gy. Except for a 410 °C peak found in the Al-doped artificial diopside, all the other peaks grow linearly with radiation dose, but saturate beyond ∼1 kGy. To investigate high-temperature effect before irradiation, measurements of TL intensity in samples annealed at 500–900 °C and then irradiated to 1 kGy γ-dose were carried out. Also the TL emission spectrum has been obtained. To compare with natural diopside, a synthetic pure polycrystal was produced and further those doped with iron, aluminum and manganese were also produced.