— the
goal of this work to determine the counting effectiveness of NaI(Tl) 2x2 well detector that is scintillationCanberra
Inc.) .The advantageous asset of this type detector its high effectiveness that used to
determination the lower degree of radiation as
normal occurring radioactive material NORM.The gamma attenuation coefficients of normal
radioisotopes and its own daughters had been determined to get the three
aspects of counting effectiveness as
shown in (Table 1). The (dining table 2) presents the values of t he
efficiencies which are counting plotted the graph due to the fact purpose of
this research..
Keywords effectiveness,
attenuation, coefficients, gamma ray, NORM.