Abstract:
:Thermoluminescene (TL) and mechanoluminescence (ML) properties of gamma-irradiated Dy activated potassium and magnesium mixed sulphate have been studied. (K2Mg2:Dy) (SO4)3 samples having different concentrations of Dy were prepared by solid-state diffusion method. Two distinct peaks, the first approximately 130 degrees C and the second approximately 273 degrees C, are observed in the TL glow curve. It is also observed that TL intensities of both peaks decrease when TL glow curves were recorded after deforming the irradiated samples. Only one peak is observed in the ML intensity vs. time curve and the ML intensity decreases markedly with the post-irradiation annealing (to remove 130 degrees C TL peak) of the sample. Both ML and TL intensities have been observed optimum for 1 mol% of Dy in the mixed sulphate system. It is suggested that the recombination of electrons with the free radicals (anion radicals produced by gamma irradiation) released from the traps during the thermal or mechanical excitation is responsible for luminescence in this system.
journal_name
Radiat Prot Dosimetryjournal_title
Radiation protection dosimetryauthors
Kher RS,Panigrahi AK,Dhoble SJ,Khokhar MSdoi
10.1093/rpd/nci607subject
Has Abstractpub_date
2006-01-01 00:00:00pages
66-70issue
1-4eissn
0144-8420issn
1742-3406pii
nci607journal_volume
119pub_type
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