Author/Authors :
D. Cortina Gil، نويسنده , , J. Fernandez-Vazquez، نويسنده , , T. Aumann، نويسنده , , T. Baumann، نويسنده , , J. Benlliure، نويسنده , , M.J.G. Borge، نويسنده , , L.V. Chulkov، نويسنده , , U. Datta Pramanik، نويسنده , , C. Forssen، نويسنده , , L.M. Fraile، نويسنده , , H. Geissel، نويسنده , , J. Gerl، نويسنده , , F. Hammache، نويسنده , , K. Itahashi، نويسنده , , R. Janik، نويسنده , , B. Jonson، نويسنده , , S. Mandal، نويسنده , , K. Markenroth، نويسنده , , M. Meister، نويسنده , , M. Mocko، نويسنده , , et al.، نويسنده ,
Abstract :
One-nucleon removal reactions at relativistic energies have been used as a spectroscopic tool to characterise the ground state properties of several neutron-rich isotopes in the sd-shell. Using the FRS at GSI, the longitudinal momentum distributions of the emerging fragments after one-nucleon removal were measured. The relative contributions of the remaining fragments in their ground and excited states have been determined from measurements of γ rays in coincidence with the longitudinal momentum distributions. In particular the breakup of 23O has been investigated. The interpretation of our measurements, in the framework of a simple theoretical model, favours a spin and parity assignment of 1/2+ for the 23O ground state in agreement with shell model predictions.
