States of high angular momentum in45Sc

SuperdeformedΛhypernuclei with antisymmetrized molecular dynamics

“…In odd Sc isotopes, it has been discussed, from the late 1960s, that the disappearance of the magic number N = 20 and the coexistence of the different deformations in the ground-state energy region, i.e., the appearance of the lowlying positive-parity states due to the promotion of a proton from the sd shell [11][12][13][14][34][35][36][37]. Furthermore, it is expected that many-particle-many-hole (mp-mh) states exist within the small excitation energy.…”

“…In 47 Sc, the positive-parity state 3/2 + lies at only 0.77 MeV above the ground state 7/2 − . The occurrence of the low-lying positive-parity states can be explained as a proton 2-particle 1-hole (2p-1h) state in the Nilsson model [11][12][13][14]. In other words, it could be said that the low-lying positiveparity states are deformed, while the ground states 7/2 − are almost spherical.…”

Properties of the low-lying negative parity states in 45Sc

“…A rough agreement has been found between the energies of the lowest levels with I > 7/2 and the calculated values. The measured excitation energies for the I = 3/2, 5/2, 1/2 levels are definitely smaller than the calculated values and they appear difficult to reconcile with a pure (lf7/2)5 configuration for any reasonable set of matrix elements for the residual interaction [29].…”

“…During the course of the present work, Metzger [28], using the nuclear resonance fluorescence technique, deduced lifetimes for some excited states in disagreement with previous values measured by the Doppler shift attenuation method. Finally, some high-spin states have recently been populated in heavy-ion induced fusion evaporation reactions [29].…”

“…New calculations have been performed [29], [40] with improved values for the residual interactions. A rough agreement has been found between the energies of the lowest levels with I > 7/2 and the calculated values.…”