Structure of 55Ti from relativistic one-neutron knockout
  Results are presented from a one-neutron knockout reaction at relativistic energies on 56Ti using the GSI FRS as a two-stage magnetic spectrometer and the Miniball array for gamma-ray detection. Inclusive and exclusive longitudinal momentum distributions and cross-sections were measured enabling the determination of the orbital angular momentum of the populated states. First-time observation of the 955(6) keV nu p3/2-hole state in 55Ti is reported. The measured data for the first time proves that the ground state of 55Ti is a 1/2- state, in agreement with shell-model calculations using the GXPF1A interaction that predict a sizable N=34 gap in 54Ca. 
P. Maierbeck, R. Gernh\"auser, R. Kr\"ucken, T. Kr\"oll, H.   Alvarez-Pol, F. Aksouh, T. Aumann, K. Behr, E.A. Benjamim, J. ...