SHELLS AND SHAPES IN THE 44S NUCLEUS

The results obtained from electron and in-beam spectroscopy experiments reveal that the S-44 nucleus is located in a transitional region between the spherical Ca-48 and the oblate Si-42. The comparison of the results with Large Scale Shell Model calculations points towards prolate-spherical shape coexistence where the ground state becomes the intruder configuration due to quadrupole excitations across the Z = 14 and N = 28 shell gaps.