Study of sub-barrier fusion of ³⁶S+⁵⁰Ti,⁵¹V systems

¹ Dipartimento di Fisica e Astronomia, Università di Padova, and INFN, Sez. di Padova, I-35131 Padova, Italy
² Laboratori Nazionali di Legnaro, I-350201 Legnaro (Padova), Italy
³ Department of Physics, Tohoku University, Sendai 980-8578, Japan
⁴ Research Center for Electron Photon Science, Tohoku University, 1-2-1 Mikamine Sendai 982-0826, Japan
⁵ Ruder Boškoví Institute, HR-10002 Zagreb, Croatia
⁶ Institute of Nuclear Physics, Polish Academy of Sciences, PL 31-342 Cracow, Poland
⁷ IPHC, CNRS-IN2P3, Université de Strasbourg, F-67037 Strasbourg Cedex 2, France
⁸ Dipartimento di Fisica, Univ. di Napoli, and INFN Sez. di Napoli, I-80126 Napoli, Italy
⁹ Centre CEA de Saclay, 91190 Gif-sur-Yvette, France

^* e-mail: giulia.colucci@pd.infn.it
^** e-mail: montagnoli@pd.infn.it
^*** e-mail: Alberto.Stefanini@lnl.infn.it
^***** e-mail: hagino@nucl.phys.tohoku.ac.jp

Published online: 4 December 2019

Abstract

A detailed comparative study of the sub-barrier fusion of the two near-by systems ³⁶S+⁵⁰Ti,⁵¹V was performed at the National Laboratories of Legnaro (INFN). Aim of the experiment was the investigation of possible effects of the non-zero spin of the ground state of the ⁵¹V nucleus on the sub-barrier excitation function, and in particular on the shape of the barrier distribution. The results sh w that the two measured excitation functions are very similar down to the level of 20 - 30 μb. The same is observed for the two barrier distributions. Coupled-channels calculations have been performed and are in good agreement with the experimental data. This result indicates that the low-lying levels in 51V can be interpreted in the weak-coupling scheme, that is, ⁵¹V(I) = ⁵⁰Ti(2⁺)⊗ p(1 f7/2).