Question

An even-2, even-N nucleus has the following sequence of levels above its

Ot ground state: 2+ (89 keV), 4+ (288 keV), 6+ (585 keV), 0’ (1050 keV),

2+ (1129 keV). (a) Draw an energy level diagram and show all reasonably

probable y transitions and their dominant multipole assignments. (b) By

considering also internal conversion, what additional transitions and multipoles would appear?

Answer 1

For an even Z and even N nucleus, nuclear spin is I = 0.

Parity of all the given states is the same and hence $\Delta \pi=0$.

Thus, for L = 2, 4, 6 ... the radiation is of electric character. For L = 1, 3, 5... radiation is of magnetic character.

E2 radiations are more probable than E4.