  The neutron-rich carbon isotopes 19,17C have been investigated via proton
inelastic scattering on a liquid hydrogen target at 70 MeV/nucleon. The
invariant mass method in inverse kinematics was employed to reconstruct the
energy spectrum, in which fast neutrons and charged fragments were detected in
coincidence using a neutron hodoscope and a dipole magnet system. A peak has
been observed with an excitation energy of 1.46(10) MeV in 19C, while three
peaks with energies of 2.20(3), 3.05(3), and 6.13(9) MeV have been observed in
17C. Deduced cross sections are compared with microscopic DWBA calculations
based on p-sd shell model wave functions and modern nucleon-nucleus optical
potentials. Jpi assignments are made for the four observed states as well as
the ground states of both nuclei.

Nuclear Experiment