Effect of gamma rays on Zn/Cu doped strontium borate glass system for dosimetric applications

Two alkali strontium borate glasses containing Cu2+ or Zn2+ ions (0.15 mol%) has been prepared by melting annealing method. Some of the glasses dosimetric measurements have been performed; they were checked by ultraviolet-visible light measurement showing the specific peaks of Cu+/Cu2+ and Zn2+ ions. Upon y-rays, glasses are sensitive to the absorbed dose in the range 0.4-15 kGy, revealing their light absorption. A gradual decrease in optical absorbance and DC electrical conductivity was detected with progressive irradiation. While a gradual increase in optical energy bandgap (Eopt) and electron paramagnetic resonance (EPR) was observed. The presence of transition metal ion (TM) with their variable configurations helps to trap the radiolytic electrons or holes during the color center recovery rates. UV-Vis and EPR dosimetric characteristics have high color stability with excellent short and long-term stability revealing their possible use as glass dosimeters in medical sterilization and food irradiation processing.

Automated summary

Two alkali strontium borate glasses containing Cu2+ or Zn2+ ions were prepared and their dosimetric properties were studied. The glasses showed sensitivity to absorbed dose and exhibited changes in optical properties and electrical conductivity upon irradiation. The presence of transition metal ions contributed to the trapping of radiolytic electrons or holes. The glasses demonstrated stability and potential for use as dosimeters in medical sterilization and food irradiation processing.