Trap Characterization in Alexandrite Using Variable Energy of Stimulation (VES-OSL)

• Grant number: 24/20645-0
• Support Opportunities: Scholarships abroad - Research Internship - Scientific Initiation
• Start date: February 01, 2025
• End date: March 31, 2025
• Field of knowledge: Physical Sciences and Mathematics - Physics - Nuclear Physics
• Principal Investigator: Neilo Marcos Trindade
• Grantee: Yasmim Freire Amorim
• Supervisor: Alicja Chruscinska
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: Nicolaus Copernicus University, Poland
• Associated to the scholarship: 22/06690-8 - Investigation of optically stimulated luminescence (OSL) of alexandrite pellets previously exposed to X-rays., BP.IC

Abstract

Identifying new materials suitable for radiation dosimetry remains challenging, and Optically Stimulated Luminescence (OSL) is a key technique for assessing luminescent properties. Among the traditional stimulation methods, such as Continuous Wave (CW-OSL) and Linear Modulated OSL (LM-OSL), the recently developed Variable Energy OSL (VES-OSL) method have emerged, focusing on deepen the understanding of traps involved in the luminescence process. Alexandrite, a chromium-doped chrysoberyl, has been previously examined using CW-OSL, method that provides valuable information but have limitations in distinguishing between various electron traps responsible for the OSL signal. Therefore, this study proposes to apply the VES-OSL technique to Brazilian alexandrite crystals, which show promise in radiation dosimetry applications. This investigation will be conducted in collaboration with Nicolaus Copernicus University under supervision of PhD Alicja Chruscinska, who pioneered VES-OSL technique.