000			02513cam a2200337 a 4500
003			EG-GiCUC
005			20250223031234.0
008			150531s2014 ua dh f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aM.Sc
099			_aCai01.12.11.M.Sc.2014.So.P
100	0		_aSoad Magdy Tadros Michael
245	1	0	_aPreparation and theoretical calculations of new dosimeters and their applications / _cSoad Magdy Tadros Michael ; Supervised Hussein Mohamed Ahmed Moustafa , Laila Ibrahim Ali
246	1	5	_aتحضير و حسابات نظرية لمقاييس جديدة للجرعات الإشعاعية و تطبيقاتها
260			_aCairo : _bSoad Magdy Tadros Michael , _c2014
300			_a172 P. : _bcharts , facsimiles ; _c25cm
502			_aThesis (M.Sc.) - Cairo University - Faculty of Science - Department of Physical Chemistry
520			_aNew 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
530			_aIssued also as CD
653		4	_a2-Methylalanine
653		4	_aDosimetry
653		4	_aEPR spectrometer
700	0		_aHussein Mohamed Ahmed Moustafa , _eSupervisor
700	0		_aLaila Ibrahim Ali , _eSupervisor
856			_uhttp://172.23.153.220/th.pdf
905			_aNazla _eRevisor
905			_aSoheir _eCataloger
942			_2ddc _cTH
999			_c51140 _d51140