Eur. Phys. J. A (2011) 47: 111
https://doi.org/10.1140/epja/i2011-11111-7

Regular Article - Experimental Physics

Sub-barrier fusion of ⁶He with ²⁰⁶Pb

¹ Henryk Niewodniczański Institute of Nuclear Physics PAS, Cracow, Poland
² Departamento de Fisica Aplicada, Universidad de Huelva, E-21071, Huelva, Spain
³ Flerov Laboratory of Nuclear Reaction, JINR, Dubna, Russia
⁴ Andrzej Sołtan Institute for Nuclear Studies, Hoża 69, PL-00681, Warsaw, Poland
⁵ Centre de Recherches du Cyclotron, Université Catholique de Louvain, B-1348, Louvain-la-Neuve, Belgium
⁶ Dipartimento di Fisica and Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131, Padova, Italy
⁷ Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Via Cintia, I-80126, Napoli, Italy

^* e-mail: wolski@nrmail.jinr.ru

Received: 2 May 2011
Accepted: 9 September 2011
Published online: 23 September 2011

Abstract

Cross-sections for the production of ²¹⁰Po nuclei in ⁶He + ²⁰⁶Pb collisions over the incident energy range 14-18MeV were measured by means of the activation technique and a radiochemical analysis. The elastic scattering at 18.0MeV was also measured providing a precise value for the ²¹⁰Po production cross-section at this energy. The results are at variance with the earlier experimental data and rather in accord with the predictions of a density-dependent barrier penetration model for the fusion process. A proper treatment of beam energy distribution for the evaluation of the activation data is discussed.