2018 Impact factor 2.481
Hadrons and Nuclei

Eur. Phys. J. A 10, 49-56

One-nucleon removal cross-sections for $\mathsf{^{17,19}C}$ and $\mathsf{^{8,10}B}$

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)

One-neutron removal cross-sections ( $\sigma_{\mathrm{-1n}}$) of $\mathsf{^{17,19}C}$ in various targets at about 900 MeV/nu cle on, and one-proton removal cross-sections ( $\sigma_{\mathrm{-1p}}$) of $\mathsf{^{8,10}B}$ at about 1400 MeV/nucleon were measured using the fragment separator FRS at GSI. A significant increase of $\sigma_{\mathrm{-1n}}$ for $\mathsf{^{19}C}$ compared to its neighbors was observed. The same behavior was found for $\sigma_{\mathrm{-1p}}$ for the neutron-deficient nucleus $\mathsf{^{8}B}$ compared to the stable isotope $\mathsf{^{10}B}$. These results support a one-neutron halo structure in $\mathsf{^{19}C}$ and a one-proton halo in $\mathsf{^{8}B}$.

25.60.Gc - Breakup and momentum distributions.
27.20.+n - Properties of specific nuclei $6 \le A \le 19$ .

© Società Italiana di Fisica, Springer-Verlag 2001