Unravelling the impact of unusual heating rate, dose-response and trap parameters on the thermoluminescence of Sm3+ activated GdAl3(BO3)4 phosphors exposed to beta particle irradiation

Souadi G., Kaynar Ü. H., Sonsuz M., Akça Özalp S., Ayvacıklı M., Topaksu M., ...More

RADIATION PHYSICS AND CHEMISTRY, vol.213, pp.111211, 2023 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 213
  • Publication Date: 2023
  • Doi Number: 10.1016/j.radphyschem.2023.111211
  • Journal Name: RADIATION PHYSICS AND CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Pollution Abstracts, Civil Engineering Abstracts
  • Page Numbers: pp.111211
  • Çukurova University Affiliated: Yes

Abstract

The thermoluminescence of GdAl3(BO3)4 (GAB) doped with various concentrations of Sm3+ (i.e. from 0.5 to 7 wt

%), prepared by gel combustion, was studied. TL glow peaks at 78 ◦C and 225 ◦C are observed. The intensity of

the glow peak at 225 ◦C increased with a faster heating rate. To gain insight into the trap activation energies, the

methods of Hoogenstraaten and Booth-Bohun-Parfianovitch were used, where the calculated activation energies

are 0.57 eV and 0.60 eV for Peak I and 1.69 eV and 1.71 eV for Peak II respectively. The dose-response of

GAB:0.5 wt%Sm3+ demonstrates robust linearity up to 40 Gy, with a strong correlation coefficient of 0.999. Both

TM-Tstop combined with the Initial Rise (IR) and Computerized Glow Curve Deconvolution (CGCD) techniques

were employed, which revealed six overlapping glow peaks beneath the main peaks. Additionally, the results

suggest that the TL signal can be efficiently exploited for radiation dosimetry applications.