Eur. Phys. J. A (2013) 49: 112
https://doi.org/10.1140/epja/i2013-13112-x

Regular Article - Experimental Physics

Study of multi-nucleon transfer reactions in ^{58, 64}Ni + ²⁰⁷Pb collisions at the velocity filter SHIP

¹ GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
² Institut für Physik, Goethe-Universität Frankfurt, 60054, Frankfurt, Germany

^* e-mail: s.heinz@gsi.de

Received: 11 February 2013
Accepted: 26 July 2013
Published online: 11 September 2013

Abstract

We investigated multi-nucleon transfer reactions in collisions of ⁵⁸Ni + ²⁰⁷Pb and ⁶⁴Ni + ²⁰⁷Pb at Coulomb barrier energies. The new aspect is that we used a velocity filter (SHIP at GSI) for the separation of the heavy target-like transfer products from background events. The isotopic identification was performed via the decay properties of the reaction products. The goal of the experiment was to study the characteristics of multi-nucleon transfer reactions in the region of heavy nuclei and the applicability of existing separation and detection techniques, which are usually used for identification of heavy fusion-evaporation residues, to heavy transfer products. This was motivated by recent theoretical results from macroscopic-microscopic models which suggest deep inelastic transfer reactions in heavy systems as a means to produce new neutron-rich isotopes in the region of N = 126 and in the region of superheavy nuclei. In this paper we present the isotopic yields, the excitation functions and the excitation energies of the heavy transfer products with Z > 82 as well as the influence of shell effects on the reaction products. The influence of the different neutron numbers of the projectiles is also discussed.