Eur. Phys. J. A 10, 49-56
One-nucleon removal cross-sections for
and
D. Cortina-Gil1, T. Baumann1, H. Geissel1, H. Lenske2, K. Sümmerer1, L. Axelsson3, U. Bergmann4, M.J.G. Borge5, L.M. Fraile5, M. Hellström1, M. Ivanov6, N. Iwasa7, R. Janik6, B. Jonson3, K. Markenroth3, G. Münzenberg1, F. Nickel1, T. Nilsson3, A. Ozawa7, K. Riisager4, G. Schrieder8, W. Schwab1, H. Simon8, C. Scheidenberger1, B. Sitar6, T. Suzuki7 and M. Winkler1
1 Gesellschaft für Schwerionenforschung, 64291 Darmstadt, Germany
2 Institut für Theoretische Physik I, 35392 Giessen, Germany
3 Fysiska Institutionen, Chalmers Tekniska Högskola, 412 96 Göteborg, Sweden
4 Institut for Fysik og Astronomi, Aarhus Universitet, 8000 Aarhus C, Denmark
5 Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain
6 Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia
7 RIKEN, 2-1 Hirosawa, Wako, Saitama 351-01, Japan
8 Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
d.cortina@usc.es, d.cortina@gsi.de
(Received: 26 July 2000 / Revised version: 5 December 2000 Communicated by D. Guerreau)
Abstract
One-neutron removal cross-sections
(
) of
in various targets at
about 900 MeV/nu cle on, and one-proton removal cross-sections
(
) of
at about 1400 MeV/nucleon
were measured using the fragment separator FRS at GSI. A significant
increase of
for
compared to its
neighbors was observed. The same behavior was found for
for the neutron-deficient nucleus
compared to the stable isotope
. These results support a
one-neutron halo structure in
and a one-proton halo in
.
25.60.Gc - Breakup and momentum distributions.
27.20.+n - Properties of specific nuclei

© Società Italiana di Fisica, Springer-Verlag 2001