The TL glow curves of undoped and various La-doped ZnB2O4
powder samples were recorded with Risø TL/OSL DA-20 reader
using Corning 7/59 and Schott BG/39 optical filters in nitrogen atmosphere. The measurements were carried out on 10 mg
samples. During measurements of all the powder samples, pre-heating process up to 140 1C for the heating rate of 2 1C/s and the
reading process up to 450 1C for the heating rate of 5 1C/s were
used. TL intensity for each glow peak was calculated by taking the
area under dosimetric peak. The dose responses of all the powder
samples exposed to 90
Sr beta radiation (40 mCi) were obtained in
the dose range from 143 mGy to 60 Gy.