⁸B + ²⁰⁸Pb Elastic Scattering at Coulomb Barrier Energies

¹ Department of Physics “E.Pancini”, University “Federico II” and INFN, Napoli, Italy
² Department of Physics and Astronomy, University of Padova and INFN, Padova, Italy
³ INFN-Sezione di Milano, Milano, Italy
⁴ CNS - The University of Tokyo, Wako-shi, Saitama, Japan
⁵ IFJ PAN, Krakow, Poland
⁶ KEK, Tsukuba, Ibaraki, Japan
⁷ Department of Physics, Sendai, Miyagi, Japan
⁸ China Institute of Atomic Energy, Beijing, China
⁹ RIKEN Nishina Center, Wako, Saitama, Japan
¹⁰ JAEA, Tokai, Ibaraki, Japan
¹¹ Department of Applied Physics, University of Huelva, Huelva, Spain
¹² Department of Physics, Kyushu University, Hakozaki, Fukuoka, Japan

^* e-mail: Marco.LaCommara@na.infn.it

Published online: 22 November 2017

Abstract

The scattering process of weakly-bound nuclei at Coulomb barrier energies provides deep insights on the reaction dynamics induced by exotic nuclei. Within this framework, we measured for the first time the scattering process of the short-lived Radioactive Ion Beam (RIB) ⁸B (S _p = 0.1375 MeV) from a ²⁰⁸Pb target at 50 MeV beam energy. The ⁸B RIB was produced by means of the in-flight facility CRIB (RIKEN, Japan) with an average intensity on target of 10 kHz and a purity about 25%. Elastically scattering ions were detected in the angular range θ_c.m. = 10°-160° by means of the detector array EXPADES. A preliminary optical model analysis indicates a total reaction cross section of about 1 b, a value, once reduced, 2-3 times larger than those obtained for the reactions induced by the stable weakly-bound projectiles ^6,7Li on a ²⁰⁸Pb target in the energy range around the Coulomb barrier.