Paragraph for Questions 9 and 10
- decay process, discovered around 1900, is basically the decay of a neutron (n), In the laboratory, a proton (p) and an electron
are observed as the decay products of the neutron. therefore, considering the decay of a neutron as a tro-body dcay process, it was predicted theoretically that thekinetic energy of the electron should be a constant. But experimentally, it was observed that the electron kinetic energy has a continuous spectrum. Considering a three-body decay process, i.e. n
, around 1930, Pauli explained the observed electron energy spectrum. Assuming the anti-neutrino
to be massless and possessing negligible energy, and neutron to be at rest, momentum and energy conservation principles are applied. From this calculation, themaximum kinetic energy of the lectron is 0.8 x
eV. The kinetic energy carried by the proton is only the recoil energy.
What is the maximum energy of the anti-neutrino ?