TY  - BOOK
AU  - Soad Magdy Tadros Michael 
AU  - Hussein Mohamed Ahmed Moustafa , 
AU  - Laila Ibrahim Ali , 
TI  - Preparation and theoretical calculations of new dosimeters and their applications / 
PY  - 2014///
CY  - Cairo : 
PB  - Soad Magdy Tadros Michael  , 
KW  - 2-Methylalanine
KW  - Dosimetry
KW  - EPR spectrometer
N1  - Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Physical Chemistry; Issued also as CD
N2  - New developed pellet dosimeter based on radiation-sensitive element of 2-methyl alanine (2-MA) for radiation process control was manufactured and its dosimetric characteristics for high-dose range 1-100 kGy applications was investigated by EPR spectrometer. The EPR spectrum of irradiated 2-MA pellets exhibits an isotropic signal with seven lines. The dose response function has a linear trend in the range of 1-11.4 kGy and sub-linear in the range of 11.4-100 kGy. It is found also that the pellet dosimeters response has a negligible humidity effect during irradiation in the range of humidity from 33-76% RH. The average increase of response as a function of temperature rise (21-60 oC)  during irradiation is ~0.96% /oC. The energy dependence of the manufactured dosimeter in the range of 0.1 {u2013} 15 MeV was calculated and it was nearly adipose tissue equivalent in this range. Additionally, it was found nearly water  equivalent in the photon energy level of 0.15-4 MeV; however, out of this range, the variation from water equivalency is within 6%. The overall uncertainty of the measured doses was ~6.6% and ~4.5% (2v, 95% confidence level) for the  dose ranges of 1-11.4 kGy and 11.4-100 kGy, respectively
UR  - http://172.23.153.220/th.pdf
ER  -