Study of one-proton transfer reaction for the $^{18}$O + $^{48}$Ti system at 275 MeV

TL;DR

This study measures and analyzes the one-proton transfer reaction $^{48}$Ti($^{18}$O,$^{19}$F)$^{47}$Sc at 275 MeV, providing new experimental data and validating theoretical models for nuclear structure and reactions.

Contribution

First measurement of the $^{48}$Ti($^{18}$O,$^{19}$F)$^{47}$Sc reaction at 275 MeV, combining experimental data with theoretical analysis to validate nuclear reaction models.

Findings

Experimental differential cross sections match theoretical predictions.

Optical potentials and shell-model descriptions are validated.

Supports multichannel approach in heavy-ion nuclear reactions.

Abstract

Single-nucleon transfer reactions are processes that selectively probe single-particle components of the populated many-body nuclear states. In this context, recent efforts have been made to build a unified description of the rich nuclear spectroscopy accessible in heavy-ion collisions. An example of this multichannel approach is the study of the competition between successive nucleon transfer and charge exchange reactions, the latter being of particular interest in the context of single and double beta decay studies. To this extent, the one-proton pickup reaction $^{48}$Ti($^{18}$O,$^{19}$F)$^{47}$Sc at 275 MeV was measured for the first time, under the NUMEN experimental campaign. Differential cross-section angular distribution measurements for the $^{19}$F ejectiles were performed at INFN-LNS in Catania by using the MAGNEX large acceptance magnetic spectrometer. The data were analyzed within the distorted-wave and coupled-channels Born approximation frameworks. The initial and final-state interactions were described adopting the S\~ao Paulo potential, whereas the spectroscopic amplitudes for the projectile and target overlaps were derived from shell-model calculations. The theoretical cross sections are found to be in very good agreement with the experimental data, suggesting the validity of the optical potentials and the shell-model description of the involved nuclear states within the adopted model space.