Multi particle excitations in ¹⁰²Cd

The structure of nuclei belonging to A ∼100 mass region are interesting to study because of the dominating shell closure effects. The even-even transitional nucleus ¹⁰²Cd with 48 protons and 54 neutrons is close to the doubly magic ¹⁰⁰Sn with N=Z=50. Its structure may follow the shell model or it may possibly develop collective features since it has sufficiently large number of valence nucleons outside the ¹⁰⁰Sn core. The distinct pattern of proton and neutron excitations at low spins may align to contribute to the total angular momentum at high spin giving rise to magnetic rotation. However, the lack of firm spin parity assignment and absolute transition strengths, the interpretation of high spin states in ¹⁰²Cd is very tentative. This mechanism is characterised by a pronounced decrease in magnetic dipole transition strength B(M1) as the shears vectors close. Such behaviour may be proved from lifetime measurements