Backscattering measurement of He-6 on Bi-209: Critical interaction distance

Author(s):Show less -

Guimaraes, V. ; Kolata, J. J. ; Aguilera, E. F. ; Howard, A. ; Roberts, A. ; Becchetti, F. D. ; Torres-Isea, R. O. ; Riggins, A. ; Febrarro, M. ; Scarduelli, V. ; de Faria, P. N. ; Monteiro, D. S. ; Huiza, J. F. P. ; Arazi, A. ; Hinnefeld, J. ; Moro, A. M. ; Rossi, E. S., Jr. ; Morcelle, V. ; Barioni, A.

• Document type: Journal article
• Source: PHYSICAL REVIEW C; v. 93, n. 6, p. 7-pg., 2016-06-14.

Abstract

An elastic backscattering experiment has been performed at energies below the Coulomb barrier to investigate static and dynamic effects in the interaction of He-6 with Bi-209. The measured cross sections are presented in terms of the d sigma/d sigma(Ruth) ratio, as a function of the distance of closest approach on a Rutherford trajectory. The data are compared with a three-body CDCC calculation and good agreement is observed. In addition, the critical distance of interaction was extracted. A larger value was obtained for the exotic He-6 nucleus as compared with the weakly bound Li-6 and Be-9 nuclei and the tightly bound He-4, C-12, and O-16 nuclei. (AU)

• FAPESP's process: 14/14432-2 - Spectroscopic investigation of nuclei for nuclear astrophysics
• Grantee: Valdir Guimarães
• Support Opportunities: Scholarships abroad - Research