Coulomb displacement energies and the structure of the low-lying negative-parity states in 2s-1d shell nuclei

Abstract

Negative-parity states in A = 13–33 nuclei are described as two-component wave functions, one containing a hole in the 1p shell, the other a particle in the 1f–2p shell. The large difference in Coulomb displacement energy (CDE) for both components has been used to determine the relative intensities by fitting the experimental CDE. For the lowest-lying states these intensities are compared to experimental ones derived from spectroscopic factors for pick-up reactions. Strong binding-energy effects seem to play an important role for these states.