B.1 For everything that follows, assume that the shell model is valid. (i) What type of term of the nuclear potential is responsible for the energy split of levels with the same nucleon orbital angular momentum? [2] (ii) What are the predicted values of JP for 815O and 817O ? (iii) The binding energies per nucleon of both 815O and 817O are smaller than that 816O. Make an argument that explains why this is expected. [3] (iv) 815O is unstable for +decay. Write down the +reaction for 815O. What is the product nucleus? Does this imply the nucleus is unstable also for electron capture? [3] (v) What are the possible values of JP for 918F ? [3]