Isochronous mass measurements of T-z =-1 f p-shell nuclei from projectile fragmentation of Ni-58

Atomic masses of seven T-z = -1, fp-shell nuclei from V-44 to Cu-56 and two low-lying isomers, V-44m (J(Pi) = 6(+)) and Co-52m (J(Pi) = 2(+)), have been measured with relative precisions of 1-4 x 10(-7 )with isochronous mass spectrometry (IMS) at the Cooler Storage Ring (CSRe), Lanzhou. The masses of Cu-56, Co-52g,Co-52m, and V-44m were measured for the first time in this experiment. The mass excesses (ME's) of V-44, Mn-48, Fe-50, and Ni-54 are determined with an order of magnitude improved precision compared to the literature values. Co-52g,Co-52m and Cu-56 are found to be 370 and 400 keV more bound, respectively, while V-44g,V-44m are similar to 300 KeV less bound than the extrapolations in the Atomic-Mass Evaluation 2012 (AME'12). The masses of the four T-z = -1/2 nuclei (45) V, Cr-47, Mn-49, and (51) Fe are re-determined to be in agreement, within the experimental errors, with the recent JYFLTRAP (University of Jyvaskyla, Finland) measurements or with the previous IMS measurements in CSRe. Details of the measurements and data analysis are described, and the impact of the new ME values on different aspects in nuclear structure are investigated and discussed.