Jopat Pragya R, Paul Sabyasachi, Sen Shashwati, Bahadur Jitendra, Patra Giri Dhari, Samanta Soumen, Pathak Ankita, Kulkarni Mukund S
Technical Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
Homi Bhabha National Institute, Mumbai 400094, India.
ACS Appl Mater Interfaces. 2024 Jul 31;16(30):39642-39655. doi: 10.1021/acsami.4c07765. Epub 2024 Jul 16.
Considering the low-level dose detection requirement for neutron and γ radiation in cancer therapy, synthesis and exploratory studies have been performed on a newly developed phosphor LiAlO:Gd. Our results reveal that the presence of both Li and Gd makes it sensitive to both gamma and thermal neutrons. The applicability of LiAlO:Gd for beta, gamma, and neutrons in both thermally stimulated and optically stimulated modes has been verified by extensive experiments followed by kinetic parametric evaluation with theoretical calculations. The current work confirms that LiAlO:Gd is a highly sensitive phosphor with a minimum detectable dose of 5.7 μSv for gamma and 92 μSv for themral neutrons. The phosphor is found to show very high sensitivity at low energy and dose. Its ability for detection and discrimination of both gamma and thermal neutrons makes it a potential material to be used in medical dosimetry.
考虑到癌症治疗中对中子和γ辐射的低剂量检测要求，对新开发的磷光体LiAlO:Gd进行了合成和探索性研究。我们的结果表明，Li和Gd的存在使其对γ射线和热中子都敏感。通过广泛的实验，随后进行理论计算的动力学参数评估，验证了LiAlO:Gd在热激发和光激发模式下对β射线、γ射线和中子的适用性。当前的工作证实，LiAlO:Gd是一种高度敏感的磷光体，γ射线的最小可检测剂量为5.7μSv，热中子的最小可检测剂量为92μSv。发现该磷光体在低能量和低剂量下表现出非常高的灵敏度。它对γ射线和热中子的检测和区分能力使其成为医学剂量测定中潜在的可用材料。
