Q13.26Multiple choice
Nuclei with magic no. of proton Z = 2, 8, 20, 28, 50, 52 and magic no. of neutrons N = 2, 8, 20, 28, 50, 82 and 126 are found to be very stable.
- (i)Verify this by calculating the proton separation energy Sp for 120Sn (Z = 50) and 121Sb = (Z = 51). The proton separation energy for a nuclide is the minimum energy required to separate the least tightly bound proton from a nucleus of that nuclide. It is given by Sp = (M Z–1, N + M H – M Z,N ) c 2. Given 119 In = 118.9058u, 120Sn = 119.902199u, Sb = 120.903824u, 1H = 1.0078252u.
- (ii)What does the existance of magic number indicate?