1)What are the products of these reactions, 14B( B),%Be ( Li, p),Be(li,d), B(a,p),2C(a, d), 12C (t, p)? 2)The total cross section for the reaction 59Co(n, y) 60Co reaction is 37 b. Calculate the mass of 60Co produced when 1 kg of 59Co metal is irradiated for 24 hours in a nuclear reactor where the neutron flux is 10 5 neutron per square centimeter per second. Neglect the decay of 60Co in your calculation 3)36CI decays into 36S(35.967081 u) and 36Ar. If the energy release is 1. 142 Mev to 36S and 0.709 Mev to 36Ar. calculate the masses of 36Ci and 36Ar. describe the modes of decay 4)An initial number NA(O) of nuclei a decay into daughter nuclei B, which are also radioactive. The respective decay probabilities areλAandλB.IfλB=2AA, cal culate the time (in terms of X a when NB is at its maximum Calculate NB(max) in terms of NA( O) 5) The radionuclide alar decays by B emission to an excited level of 4 K that is 1.29 3 Mev above the ground state. What is the maximum kinetic energy of the emitted B particle? 6)The activity of a radioisotope is found to decrease by 30% in one week. What are the values of its (a) decay constant,(b) half-life, and(c)mean life?
1) What are the products of these reactions, 14B ( ,), 9Be (6Li, p), 9Be (7Li, d), 11B (, p), 12C (, d), 12C (t, p)? 2) The total cross section for the reaction 59Co (n, ) 60Co reaction is 37 b. Calculate the mass of 60Co produced when 1 kg of 59Co metal is irradiated for 24 hours in a nuclear reactor where the neutron flux is 1015 neutron per square centimeter per second. Neglect the decay of 60Co in your calculation. 3）36CI decays into 36S (35.967081 u) and 36Ar. If the energy release is 1.142 MeV to 36S and 0.709 MeV to 36Ar, calculate the masses of 36CI and 36Ar. Describe the modes of decay. 4）An initial number NA(0) of nuclei A decay into daughter nuclei B, which are also radioactive. The respective decay probabilities areλA and λB. IfλB = 2λA , calculate the time (in terms of λA)when NB is at its maximum. Calculate NB (max) in terms of NA(0) 5) The radionuclide 41Ar decays by β - emission to an excited level of 41K that is 1.293 MeV above the ground state. What is the maximum kinetic energy of the emitted β - particle? 6) The activity of a radioisotope is found to decrease by 30% in one week. What are the values of its (a) decay constant, (b) half-life, and (c) mean life?
