Reactions induced by ¹¹Be beam at Rex-Isolde

¹ INFN-Laboratori Nazionali del Sud and Sezione di Catania, Italy
² Dipartimento di Fisica ed Astronomia Universitá di Catania, Catania, Italy
³ Departamento de Fisica Aplicada Universidad de Huelva, Huelva, Spain
⁴ Instituto de Estructura de la Materia CSIC, Madrid, Spain
⁵ ISOLDE, CERN, CH-1211 Geneva 23, Switzerland
⁶ Departamento de Fisica Atomica Molecular Nuclear Universidad de Sevilla, and Centro Nacional de Aceleradores, Sevilla, Spain
⁷ Department of Physics Faculty of Science University of Zagreb, Zagreb, Croatia
⁸ Dipartimento di Metodologie Fisiche e Chimiche per l’Ingegneria Universitá di Catania, Catania, Italy
⁹ Instituut voor Kern-en Stralingsfysica K.U.Leuven, Belgium
¹⁰ Division of Experimental Physics Ruder Bošković Institute, Zagreb, Croatia

^a e-mail: dipietro@lns.infn.it

Abstract

The collision induced by the three Beryllium isotopes, ^9,10,11Be, on a ⁶⁴Zn target were investigated at E_c.m. ≈ 1.4 the Coulomb barrier. The experiments with the radioactive ^10,11Be beams were performed at the Rex-Isolde facility at CERN. In the case of ^9,10Be, elastic scattering angular distributions were measured whereas, in the ¹¹Be case, the quasielastic scattering angular distribution was obtained. A strong damping of the quasielastic cross-section was observed in the ¹¹Be case, in the angular range around the Coulomb-nuclear interference peak. In this latter case a large total-reaction cross-section is found. Such a cross-section is more than a factor of two larger than the ones extracted in the reactions induced by the non-halo Beryllium isotopes. A large contribution to the total-reaction cross-section in the ¹¹Be case could be attributed to transfer and/or break-up events.