Speaker
Ms
Kanokwan Boonsook
(King Mongkut's University of Technology Thonburi (KMUTT))
Description
The aim of this study is to analyze the interaction of gamma radiation with powder and bulk hydroxyapatite synthesized from quail eggshell at various doses for development hydroxyapatite as a routine dosimeter. The powder and bulk of hydroxyapatite were irradiated with gamma from 0.1 kGy to 10 kGy. Electron spin resonance (ESR) spectroscopy was used to determine and evaluate dose response from characteristic signal. The center peak group of both ESR signals was occurred g-value at 2.0029, 2.0022, 2.0018 and 1.9986 that indicated the radiation induced inorganic free radicals of 4 molecule ions as CO-, CO2-, CO33- and CO2-, respectively. The correlation between the intensity of ESR signal with the dose response of bulk hydroxyapatite was good polynomial function in range 0.2 kGy to 2 kGy. Furthermore, the free radicals stability of hydroxyapatite during 45 - 90 days after irradiated showed a small decay about 25%. These results have shown that the bulk hydroxyapatite from quail eggshell could be used a good and easily routine dosimeter for high dose.
Author
Ms
Kanokwan Boonsook
(King Mongkut's University of Technology Thonburi (KMUTT))
Co-authors
Dr
Kittisakchai Naemchanthara
(King Mongkut’s University of Technology Thonburi)
Prof.
Pichet Limsuwan
(King Mongkut’s University of Technology Thonburi)
Mrs
Sumalee Ninlapruk
(Office of atom for peace)
