Nuclear structure studies performed using the (18O,16O) two-neutron transfer reactions

D Carbone,J Lubian,F Cappuzzello,S.M Lenzi,R Linares,A Gargano,J L Ferreira,M Cavallaro,C Agodi,G Santagati,A Foti

doi:10.1088/1742-6596/966/1/012016

Abstract

Excitation energy spectra and absolute cross section angular distributions were measured for the 13C(18O,16O)15C two-neutron transfer reaction at 84 MeV incident energy. This reaction selectively populates two-neutron configurations in the states of the residual nucleus. Exact finite-range coupled reaction channel calculations are used to analyse the data. Two approaches are discussed: the extreme cluster and the newly introduced microscopic cluster. The latter makes use of spectroscopic amplitudes in the centre of mass reference frame, derived from shell-model calculations using the Moshinsky transformation brackets. The results describe well the experimental cross section and highlight cluster configurations in the involved wave functions.

Highlights

Direct two-nucleon transfer reactions play an important role in the study of specific features of the atomic nucleus and they were extensively explored [1] [2] [3] [4] [5] to study for example pairing correlations
In ref. [17] the experimental absolute cross sections of the one- and two- neutron transfer reactions induced by an 18O beam on a 12C target were reproduced without any scaling factor by means of Exact Finite Range (EFR) Coupled Reaction Channel (CRC) calculations
An example of the obtained energy spectra for the 15C nucleus is shown in Fig. 1, in which the 14C background spectrum coming from the 12C impurities in the 13C target is superimposed, after normalization

Summary

Introduction

Direct two-nucleon transfer reactions play an important role in the study of specific features of the atomic nucleus and they were extensively explored [1] [2] [3] [4] [5] to study for example pairing correlations. [17] the experimental absolute cross sections of the one- and two- neutron transfer reactions induced by an 18O beam on a 12C target were reproduced without any scaling factor by means of Exact Finite Range (EFR) CRC calculations.

Results

Conclusion