Uncontrolled disposal of produced water from oil and gas industry in the
environment involves the environmental hazard like contamination soil by NORM and
increase the radiation exposure to terrestrial gamma radiation by workers and public. the
st
udy aims to measure radiation levels in the drainage zone and vicinity in the field of
crude oil storage tanks in the site of Syrian company for oil transport in Banyas. Terrestrial
gamma radiation dose was measured, the values ranged between 0.02 – 0.24 μSv.h-1. The
radioactivity concentrations of NORM were determined for Ra226, Th232, K40 by gamma
spectroscopy using HPGe detector in surface soil samples taken from three sites, two of
them recorded the highest rate of radiation dose, while the third recorded the rate of
radiation background. The Ra226, K40, Th232highestconcentrations in the soil samples were
found to be 210, 213 and 55.9 Bq.kg-1, respectively. Radiation indexes were estimated.
The present results were compared with results published in different countries.
In this work, it has been studied Compton Effect using the 662 keV gamma rays from a radioactive source of cesium-137 (137Cs) intensity (3.33×105 Bq) on Aluminum rod (who plays scatter). It has been measured the differential cross section, and the ex
perimental values of differential cross section compared with theoretical values given by Klein - Nishina equation.
In this work, we calculated the gamma energy (Eg) of scattered photons in Compton effect, as a function of scattering angle,q. We have used in this work gamma radioactive source, Cisium-137 (137Cs); its intensity is 3,33.105Bq, where it has been orie
nted towards an aluminum scatterer. The results obtained showed that the energy variation of the scattered photon on an aluminum scatterer, as a function of the scattering angle, is in good agreement with the values obtained by theoretical equation.
This experiment was carried out to study the effect of increasing gamma
radiation doses (up to 24 GY) on the eggs of Callosobruchus maculatus, at
different ages, to determine their effect on egg hatching rate, and other
biological traits of the em
erging adults from eggs treated with sub – lethal
doses.
It has been noticed that the low gamma radiation doses killed most of the
one –day old eggs before hatching, and no adult insect could emerge from
hatching those eggs, and the dose of 12GY caused the same effect, but on two
day-old eggs. when eggs were at the age of 3, 4, and 5 days, gamma radiation
didn’t have influenced on the embryo development, but demise percentage,
increased after hatching.
The percentage of emerged adults was only 1.8% for the eggs treated with
16 GY gamma radiation.
