Question: 1. Find the values of the disintegration constant and half-life of a radio- active substance for which the following counting rates were obtained at

1. Find the values of the disintegration constant and half-life of a

1. Find the values of the disintegration constant and half-life of a radio- active substance for which the following counting rates were obtained at different times. Time, hr Counting rate, counts/min Couning rate, counts/min Time, hr 0.0 6.0 1800 0.5 9535 7.0 1330 1.0 8190 8.0 980 1.5 7040 9.0 720 2.0 6050 10.0 530 3.0 4465 11.0 395 4.0 3295 12.0 290 5.0 2430 What would have been the counting rate at t = 0? Answer 12. 96495.0 coul/gm mole. PER 10 0.005058 min-1, The counting rate at t = 0 would 1. T = 137 min; A have been 11,100 min-1. %3D

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