Competition between direct and sequential two-neutron transfers in the ${}^{18}$O + ${}^{28}$Si collision at 84 MeV

Abstract

In this work we study the simultaneous and sequential two-neutron transfer mechanisms to the ${}^{28}$Si nucleus induced by (t,p) and (${}^{18}$O, ${}^{16}$O) reactions. New experimental cross sections for the ${}^{28}$Si(${}^{18}$O,${}^{16}$O)${}^{30}$Si reaction at 84 MeV are also presented. Direct reaction calculations are carried out within the Exact Finite Range Coupled Reaction Channel, for the simultaneous transfer of the two-neutron cluster, and the second order Distorted Wave Born Approximation, for the sequential transfer. Two different models are considered to describe the two-neutron cluster. The spectroscopic information was obtained from shell model calculation with {\it psdmod} interaction for the target overlaps where the 1p${}_{3/2}$, 1p${}_{1/2}$, 1d${}_{3/2}$, 1d${}_{5/2}$ and 2s${}_{1/2}$ orbitals are included as valence sub-space. We show that simultaneous and sequential two-neutron transfer are competing mechanisms for the population of the ground state in ${}^{30}$Si. A systematic analysis of the two-neutron transfer induced by the (${}^{18}O{,}^{16}O$) indicates that static deformation of target nuclei impacts on the two-neutron transfer mechanism.

References in corpus (1)

• The MAGNEX spectrometer: results and perspectives

Cited by in corpus (8)

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• Analysis of one-neutron transfer reaction in ${}^{18}$O + ${}^{76}$Se collision at 275 MeV
• Analysis of the one-neutron transfer to ${}^{16}$O, ${}^{28}$Si and ${}^{64}$Ni induced by (${}^{18}$O, ${}^{17}$O) reaction at 84 MeV
• One-neutron transfer reaction in the ${}^{18}$O + ${}^{48}$Ti collision at 275 MeV
• Investigation of the one-neutron transfer in ${}^{13}$C + ${}^{28}$Si at E${}_{lab}$ = 30 and 34 MeV
• An overview of the scientific contribution of Andrea Vitturi to Nuclear Physics (being an account of the recent TNP19 meeting held in Padova)