Scholarlink

<p>Graphite a semimetal with potential application as a thermoluminescent dosimeter (TLD) for measuring absorbed doses in medical environments using ionizing radiation, such as X-ray units and linear accelerators. Thermal resistance is crucial, as the material must remain stable up to 400&#xa0;°C. Previous studies suggest that commercial graphite may present properties suitable for TLD use. In this work, three graphite samples were analyzed: pencil grades 9B and 2B, which contain wax for drawing, and a wax-free sample referred to as (G). Samples were heated at different temperatures and studied with X-ray diffraction, Fourier-transform infrared spectroscopy, and Raman spectroscopy. Raman analysis focused on the D peak, linked to structural defects, and the G peak, associated with graphitic carbon. At 400&#xa0;°C, Raman and FTIR signals weakened significantly, preventing further analysis. Results indicate that samples 9B and 2B show temperature dependence, confirming graphite’s potential but limited stability for clinical dosimetry.</p> Graphical abstract <p></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

Temperature influence on the response of graphite for thermoluminescent applications

  • 期刊论文

  • 发表日期：

    2026年4月6日

查看全文
  • Jessica Paola Córdova-Fraga,
  • José Edgardo Arellano Hernández,
  • María de los Ángeles Mendoza,
  • Francisco Miguel Vargas Luna,
  • Manuel Iván León Madrid,
  • Modesto Antonio Sosa Aquino

摘要

Graphite a semimetal with potential application as a thermoluminescent dosimeter (TLD) for measuring absorbed doses in medical environments using ionizing radiation, such as X-ray units and linear accelerators. Thermal resistance is crucial, as the material must remain stable up to 400 °C. Previous studies suggest that commercial graphite may present properties suitable for TLD use. In this work, three graphite samples were analyzed: pencil grades 9B and 2B, which contain wax for drawing, and a wax-free sample referred to as (G). Samples were heated at different temperatures and studied with X-ray diffraction, Fourier-transform infrared spectroscopy, and Raman spectroscopy. Raman analysis focused on the D peak, linked to structural defects, and the G peak, associated with graphitic carbon. At 400 °C, Raman and FTIR signals weakened significantly, preventing further analysis. Results indicate that samples 9B and 2B show temperature dependence, confirming graphite’s potential but limited stability for clinical dosimetry.

Graphical abstract