Chapter 30 - Nuclear Reactions and Elementary Particles - Learning Path Questions and Exercises - Exercises - Page 1031: 19

a). (2) is the correct answer. If the daughter does not recoil, the 5.35 MeV is shared by the beta and the neutrino. Since the latter has 2.65 MeV of the full amount of the energy, the beta must have less than 5.35 MeV energy. b). Maximum possible kinetic energy = 5.35-2.65=2.7 MeV. c). If the daughter nucleus does not recoil appreciably, the beta particle and the neutrino must have equal but opposite momenta, so they must move in opposite directions.

a). (2) is the correct answer. If the daughter does not recoil, the 5.35 MeV is shared by the beta and the neutrino. Since the latter has 2.65 MeV of the full amount of the energy, the beta must have less than 5.35 MeV energy. b). Maximum possible kinetic energy = 5.35-2.65=2.7 MeV. c). If the daughter nucleus does not recoil appreciably, the beta particle and the neutrino must have equal but opposite momenta, so they must move in opposite directions.