Energy of anti-neutrino

Electricity and Magnetism Level 3

The β \beta -decay process, discovered around 1900, is basically the decay of a neutron ( n ) (n) . In the laboratory, a proton ( p ) (p) and an electron ( e − ) ( e^- ) are observed as the decay products of the neutron. Therefore, considering the decay of a neutron as a two-body decay process, it was predicted theoretically that the kinetic 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 → p + e − + ( v e ‾ ) n \rightarrow p + e^- + (\overline{v_e}) , around 1930, Pauli explained the observed electron energy spectrum. Assuming the anti-neutrino ( v e ‾ ) ( \overline{v_e} ) to be massless and possessing negligible energy, and the neutron to be at rest, momentum and energy conservation principles are applied. From this calculation, the maximum kinetic energy of the electron is 0.8 × 1 0 6 0.8 \times 10^6 eV. The kinetic energy carried by the proton is only the recoil energy.

What is the maximum energy of the anti-neutrino?

Much larger than 0.8 × 1 0 6 0.8 \times 10^6 eV. Much less than 0.8 × 1 0 6 0.8 \times 10^6 eV. Zero. Nearly 0.8 × 1 0 6 0.8 \times 10^6 eV.

Veer Rangan by Veer Rangan , 29, India

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1 solution

The anti-neutrino was first postulated in 1930 by Wolfgang Pauli to explain the apparent violation of conservation of energy and momentum in beta decay. Therefore, the maximum energy of the anti-neutrino is nearly that of the electron.

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