https://doi.org/10.1140/epja/i2012-12095-4
Regular Article - Experimental Physics
Gamma-ray measurements in the one-neutron knockout of 17C, 19N, 21O and 25F
1
Departmento de Física de Partículas, Universidade de Santiago de Compostela, E-15782, Santiago de Compostela, Spain
2
GSI Helmholtzzentrum für Schwerionenforschung, D-64291, Darmstadt, Germany
3
Instituto de Estructura de la Materia, CSIC, E-28006, Madrid, Spain
4
Kurchatov Institute, 123182, Moscow, Russia
5
Physik Department E12, Technische Universität München, D-85748, Garching, Germany
6
Fundamental Fysik, Chalmers Tekniska Högskola, SE-41296, Göteborg, Sweden
7
PH Department, CERN, CH-1211, Geneve, Switzerland
8
Astronomy and Physics Department, Saint Mary’s University, B3H 3C3, Halifax, NS, Canada
* e-mail: rodriguez@ganil.fr
Received:
16
March
2012
Revised:
15
June
2012
Accepted:
23
June
2012
Published online:
20
July
2012
One-neutron knockout reactions in a 9Be target have been investigated at relativistic energies, near 700 MeV/u, for a set of sd-shell, neutron-rich nuclei. The experiment was performed in the FRS spectrometer, at GSI. γ-ray measurements were carried out by means of the MINIBALL γ-ray spectrometer and allowed the determination of partial cross-sections and branching ratios corresponding to the final states of the emerging knockout fragments. Experimental results are presented for 17C, 19N, 21O and 25F projectiles. The role of excited states of the N − 1 fragments in the composition of the ground state of these neutron-rich projectiles is outlined in this work.
© SIF, Springer-Verlag Berlin Heidelberg, 2012