When $_{90}T{h^{228}}$ transforms to $_{83}B{i^{212}}$, then the number of the emitted  $\alpha$- and $\alpha$- particles is, respectively

The composition of an $\alpha $- particle can be expressed as

$\gamma$-decay occurs when

Consider a $\beta$ decay reaction

${}_1^3H \to {}_2^3He + {e^{ - 1}} + \bar v$

Atomic mass of ${}_1^3H$and ${}_2^3He$ are $3.016050\,u$ and $3.016030\,u$. Find the maximum possible energy of electron ....... $MeV$

In an $\alpha -$ decay, the kinetic energy of $\alpha -$ particle is $48\, MeV$ and $Q$ value of the reaction is $50\, MeV$. The mass number of the mother nucleus is [assume that daughter nucleus is inground state]

Before the neutrino hypothesis, the beta decay process was thought to be the transition, $n \to p + {e^ - }$ If this was true, show that if the neutron was at rest, the proton and electron would emerge with fixed energies and calculate them. Experimentally, the electron energy was found to have a large range.