Physics — Nuclear Reactions

{}^{A}_{Z}\text{X} \rightarrow {}^{A-4}_{Z-2}\text{Y} + {}^{4}_{2}\alpha

{}^{A}_{Z}\text{X} \rightarrow {}^{\;A}_{Z+1}\text{Y} + {}^{\;0}_{-1}\beta + \bar{\nu}

\text{conserve nucleon number } A

\text{conserve charge } Z