CPB Ljubljana 2018 course book

Radioactive Decay

β +

▪  + decay

In 89.9%:

The β + -particle and the neutrino share the disintegration energy Q β+ . The emitted β + -particle can have any kinetic energy up to the maximum possible, T β+,max , as can be derived from:

E

= Q

β+ - 1.2746 MeV*= 0.546 MeV

β+,max

*daughter nucleus is always (99.944%) in an excited state and decays via isometric transition to the ground state by emitting 1.2746 MeV γ-rays.