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The transformation (decay) scheme for a radioactive source is shown below. The energy absorption coefficient for air is given in the table below. Assume the source to be a point source. i) Calculate the specific gamma-ray constant for this radioisotope ii) Using the result in (1), Calculate the exposure rate at a distance of 500 cm form the source if the activity of the source is 2 Ci (1C1 = 3.7 x 10 Bq). A 0.70 B. 0.12MAY 170% probility of B 10.24 Mev Omissions B 10.18 Mev emission 19000 0.19 not comeed abalt ß best about photons probelity & 0.326 Mev 1970= 0.2= Frequray 40.6% 0.723 Mev 0.503Mev 10.177 Mev 0.164 Mev B Energy (MeV) 0.164 0.503 0.326 0.177 0.723 Energy absorption coeff.(m!) 3.3 x 10- 3.8 x 103 3.8 x 102 3.4 x 103 3.8 x 103