Thermoluminescent properties of ZnS:Mn nanocrystalline powders

• Nanocrystals in powder of ZnS:Mn were synthesized using the co-precipitation method.
• The integrated TL spectra has a linear behavior on the dose range 5–100 mGy of γ-radiation.
• The kinetic parameters were obtained by the CGCD procedure.
• Results support the possible use of nanocrystalline ZnS:Mn as a new γ-dose nanoTLD.

Thermoluminescent ZnS nanocrystals doped with Mn2+ ions were synthesized by chemical co-precipitation method. From X-ray diffraction studies it was observed that the synthesized nanoparticles have cubic zinc blende structure with average sizes of about 40–50 nm. Morphology was analyzed by TEM. Photoluminescence studies showed two transitions, one of them close to 396 nm and other close to 598 nm, which is enhanced with increasing dopant concentration, this behavior was also observed in the cathodoluminescence spectrum. The thermoluminescence gamma dose-response has linear behavior over dose range 5–100 mGy, the glow curve structure shows two glow peaks at 436 K and at 518 K that were taken into account to calculate the kinetic parameters using the Computerized Glow Curve Deconvolution procedure.