What is the source of emitted delayed neutron during the decay of 87Br?
Pl see the ‘ full’ decay scheme of 87Br and 94Br. In case of Br-87, it decays by 2 simultaneous β-. 87Br (β-)87mKr 87Br (β-)87Kr 87mKr decays to 86Kr by neutron emission i.e. 87mKr (n) 86Kr (Stable) 87m Kr 36 à 86 Kr 36 + 1 n 0 Where as 87Kr undergoes several β- decay and finally decays to stable 87Sr.