The fragment separator FRS at GSI was used as an energy-loss spectrometer to measure the longitudinal momentum distributions of { 16,18}C fragments after one-neutron removal reactions in { 17,19}C impinging on a carbon target at about 910 MeV/u. The distributions in the projectile frames are characterized by a FWHM of 141+-6 MeV/c for { 16}C and 69+-3 MeV/c for { 18}C. The results are compared with experimental data obtained at lower energies and discussed within existing theoretical models.
Categories: nucl-ex