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      https://www.ias.ac.in/article/fulltext/pram/047/02/0125-0132

    • Keywords

       

      Thermally stimulated luminescence; electron paramagnetic resonance; photo acoustic spectroscopy

    • Abstract

       

      The electron/hole trapped centres created during internal irradiation in239Pu doped K2Ca2(SO4)3 were investigated using electron paramagnetic resonance (EPR), thermally stimulated luminescence (TSL) and photoacoustic spectroscopic studies (PAS). These techniques were used to identify the defects and characterize the thermally induced relaxation processes. TSL studies of self (α)/γ-irradiated239Pu doped K2Ca2(SO4)3 revealed two glow peaks around 400 and 433K. Plutonium introduced as Pu4+ was partly reduced to Pu3+ due to self irradiation. This was ascertained from PAS studies. EPR studies carried out on these samples showed the formation of radical ions SO4, SO3, O3, etc. The thermal destruction of SO4 ion was found to be associated with the prominent glow peak around 433K. Pu3+ was found to act as luminescent centre for the observed TSL glow. The trap depth for the glow peak at 433K has been determined from TSL and EPR data.

    • Author Affiliations

       

      T K Seshagiri1 V Natarajan1 A R Dhobale1 M D Sastry1

      1. Radiochemistry Division, Bhabha Atomic Research Centre, Bombay - 400 085, India
    • Dates

       
  • Pramana – Journal of Physics | News

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