12:53 am Sun 28 May

12:53 am Sun 28 May Home 10 B Insert Draw Layout Review View Table 110/0 e 9 Experiment 3 Radioactivity-2021 Arial 0 Q It can be shown that if No gamma rays are produced by a material, the number N remaining after travelling a distance x in an absorber is given by the fraction N(t) Noe (9) where X is the linear absorption coefficient, having units of m-1. The linear absorption coefficient varies with the material and also the energy of the gamma ray. The absorption coefficient of lead for the gamma rays used in this experiment is approximately X = 68 m-1. Calculate the fraction N/No of Y particles which would remain after travelling 1 cm in lead. What thickness of lead was required experimentally to attenuate the Y rays to this fraction value? Comment on the agreement of calculation and experiment. B 1 6.3 Measur