Thermal neutron dose evaluation using MAGICA polymer gel dosimeter
Polymer gel dosimeters are fabricated from radiation sensitive chemicals which,upon irradiation,polymerize as a function of the absorbed radiation dose.In this research stiffness of MAGIC gel dosimeter improved by addition of agarose and was named MGICA.MAGICA gel dosimeter irradiated by moderated fission neutrons in Tehran Research Reactor (TRR) thermal column,and the response of gel was investigated as variation of spin-spin relaxation rate in MR image of gel phantoms.The linearity of the response (R2) versus absorbed dose (D),sensitivity,dose resolution and minimum detectable dose (MDD) were investigated.For calibration of gel response versus dose,foil activation analysis was performed.A cadmium covered gold foil was placed at the end of column (nearest to core) to ensure avoidance of non thermal neutrons in the thermal column.Sensitivity and MDD of MAGICA gel dosimeter for thermal neutron were 0.17 ± 0.01 Gy-1s-1 and 1.2 Gy respectively.From this study it concluded that MAGICA gel dosimeter is a capable instrument for thermal neutron dosimetry.
Gel dosimetry MAGICA Neutron Thermal column MRI
S.M. Abtahi S. M. Aghamiri H. Khalafi M. Zahmatkesh
Radiation Medicine Department, Nuclear Engineering Faculty, University of Shahid Beheshti, P.O. Box： Nuclear Science and Technology Research Institute, AEOI, P.O. Box：14395-836, Tehran - Iran
国际会议
World Congress on Medical Physics and Biomedical Engineering (2012年医学物理及生物医学工程国际会议(IFMBE))
北京
英文
1157-1159
2012-05-26（万方平台首次上网日期，不代表论文的发表时间）