a) The thin walled cylinder shown above has a uniform coating of Co-60 on the inner surface producing a surface source strength of 0.01 Ci/cm. Assuming the cylinder is in air, calculate, to a reasonable engineering approximation, the gamma ray energy flux in MeV/em2-sec at the detector location shown. (Co-60 emits two gamma rays of energy 1.17 MeV and 1.33 MeV per decay.) b) Assume the cylindrical source is at the center of a large tank of water. Calculate the absorbed dose rate in water, in rads/hr, due to previously unscattered flux, at the detector location. List any assumptions you make. 10 cm 15 cm Detector 5 cm S=0.01 Ci/cm?