Dose response characteristics of polymethacrylic acid gel (PMAAG) for a polymerization-based dosimeter using NMR.
The radiation-response characteristics of polymetharylic acid gel dosimeter prepared with different concentrations of monomer and cross-linker is described in these studies. The dosimeters were prepared under the hypoxic condition in a glove box and were then irradiated with gamma-rays produced by Co-60 radionuclide that was generated at 1.25MeV energy. The irradiation took place at different doses ranged from 0Gy to 19Gy. Due to the radiation activities, chain-reaction polymerisation processes had taken place in the formation of polymethacrylic acid (PMAA) gel, which cause the dose response mechanism increased in the NMR relaxation rates of protons. It has been observed that for higher concentration of monomer and cross-linker, the polymerization rate was increased.
Iskandar
S M
SM
Department of Physics, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul, Ehsan Malaysia.
Elias
S
S
Jumiah
H
H
Asri
M T M
MT
Masrianis
A
A
Ab Rahman
M Z
MZ
Taiman
K
K
Abdul Rashid
M Y
MY
D003037:Cobalt Radioisotopes; D004307:Dose-Response Relationship, Radiation; D005720:Gamma Rays; D005782:Gels; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D011109:Polymethacrylic Acids / Q000138:chemical synthesis*; D011522:Protons; D011874:Radiometry / Q000295:instrumentation*; D012680:Sensitivity and Specificity
D003037:Cobalt Radioisotopes; D005782:Gels; D011109:Polymethacrylic Acids; D011522:Protons; C030613:polymethacrylic acid