Scholarlink

<p>Thermoluminescence (TL) dosimetric properties of nanocrystalline LiCaBO<sub>3</sub>:Sm<sup>3+</sup> (0.3&#xa0;mol%) synthesized by the solid-state reaction method and annealed at 700&#xa0;°C/1h were investigated for the first time. XRD analysis confirmed the formation of an orthorhombic LiCaBO<sub>3</sub> phase with an average crystallite size of 19&#xa0;nm, along with a minor secondary phase. FESEM images revealed porous and agglomerated hexagonal flake-like structures with an average thickness of ~ 34&#xa0;nm, while EDS analysis verified the incorporation of Sm<sup>3+</sup> ions. FTIR and Raman spectra showed the characteristic vibrational modes of (BO<sub>3</sub>)<sup>3−</sup> groups. UV–Vis analysis indicated a direct bandgap of 3.34&#xa0;eV. The phosphor samples were irradiated using a <sup>137</sup>Cs γ-source in the dose range of 0–20&#xa0;Gy. A prominent TL glow peak centered at 187&#xa0;°C was observed within the suitable dosimetric temperature region. Glow curve deconvolution identified five trapping peaks, including a major dense trap near 181&#xa0;°C. The kinetic parameters were determined using Chen’s peak shape method. The TL response exhibited good linearity up to 20&#xa0;Gy, indicating the suitability of the synthesized phosphor for TL dosimetry applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Thermoluminescence behavior of nanocrystalline LiCaBO3:Sm3+ under gamma irradiation

  • 期刊论文

  • 发表日期：

    2026年7月29日

查看全文
  • Muhammad Imran,
  • Muhammad Kashif,
  • Amjad Sohail,
  • Ishrat Sultana,
  • Ussama Abbas,
  • Taqmeem Hussain,
  • Samira Elaissi,
  • Khalil Ahmad

摘要

Thermoluminescence (TL) dosimetric properties of nanocrystalline LiCaBO3:Sm3+ (0.3 mol%) synthesized by the solid-state reaction method and annealed at 700 °C/1h were investigated for the first time. XRD analysis confirmed the formation of an orthorhombic LiCaBO3 phase with an average crystallite size of 19 nm, along with a minor secondary phase. FESEM images revealed porous and agglomerated hexagonal flake-like structures with an average thickness of ~ 34 nm, while EDS analysis verified the incorporation of Sm3+ ions. FTIR and Raman spectra showed the characteristic vibrational modes of (BO3)3− groups. UV–Vis analysis indicated a direct bandgap of 3.34 eV. The phosphor samples were irradiated using a 137Cs γ-source in the dose range of 0–20 Gy. A prominent TL glow peak centered at 187 °C was observed within the suitable dosimetric temperature region. Glow curve deconvolution identified five trapping peaks, including a major dense trap near 181 °C. The kinetic parameters were determined using Chen’s peak shape method. The TL response exhibited good linearity up to 20 Gy, indicating the suitability of the synthesized phosphor for TL dosimetry applications.