Question

Problem 7 (Ch 32): 60 Co (Cobalt 60) decays through ß- decay to an excited state of 60Ni (Nickel 60). To get to the ground state, the nickel emits a 1.1732 MeV gamma ray followed by a 1.3325 MeV gamma ray. If the nickel emits those gamma rays from rest in the exact same direction, what is the final recoil velocity of the nickel nucleus? The mass of 60Ni is 59.930786u. (10 points)

Answer 1

Page No. Momentum of Mi after first decay - 1.1732 Mev Mevle . By conservation of momentum frial velocity of Ni (2) M(Ni) Vz 4:1732 Mevlet 1-33 25 Mevlc is = 0.15 93 Merle V2 0.1593 Merte = M (Ni) 0.1593 Merle 59.9307 8 6 u 0.1593 Mello (59.9307867 (932) Metilen V2 = 2.852x17 oc V2 855.6 mls