1) What are the products of these reactions, 14B ( ,),
9
Be (6Li,
p), 9Be (7Li, d), 11B (, p), 12C (, d), 12C (t, p)?
2) The total cross section for the reaction
Co (n, )
59
60
Co
reaction is 37 b. Calculate the mass of 60Co produced when 1 kg
of
59
Co 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
36
S (35.967081 u) and
36
Ar. 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
Ar decays by β- emission to an excited
41
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?