137Cs decays by emission of a negative beta particle to a metastable state of 137mBa. This nucleus then emits a gamma ray of 661.7 keV in order to decay to its ground state. Find the maximum kinetic energy of the beta particle. The mass of 137Ba is 136.905812 a.m.u and that of 137Cs is 136.907073 a.m.u. 1 a.m.u. = 931.5 MeV/c2.