Single-nucleon transfer reactions offer a valuable way to probe nuclear structure. We explore the effect of directly introducing overlap functions computed using the Gamow shell model (GSM) into reaction calculations, taking the ${\langle }^7\mathrm{Li}\mid {}^6\mathrm{He}+p\rangle$ single-proton overlap as a case study. By incorporating both internucleon correlations and continuum coupling, the GSM provides accurate overlap functions in both interior and asymptotic regions, together with the corresponding spectroscopic factors (SFs). These theoretical SFs and overlap functions were included in a coupled-channels Born-approximation analysis of the ${}^6\mathrm{He}{}^7\mathrm{Li}$ transfer reaction. Overlap functions derived from ab initio no-core shell-model (NCSM) calculations as well as standard single-particle (s.p.) wave functions were also considered for comparison. Our results reveal significant differences between the calculated angular distributions when employing theoretical SFs with standard s.p. wave functions compared to the full theoretical overlap functions. Discrepancies were also observed between angular distributions calculated with GSM and NCSM overlap functions, highlighting the importance of internal structure and correct asymptotic behavior in reliable reaction calculations. The GSM overlap functions also provided a good description of the ${}^{208}\mathrm{Pb}{(}^7\mathrm{Li}{,}^6\mathrm{He}$)${}^{209}\mathrm{Bi}$ reaction when included in a coupled reaction-channels calculation.

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• Direct reactions
• Low & intermediate energy heavy-ion reactions
• Nuclear reactions
• Nuclear structure & decays
• Transfer reactions
• Unstable nuclei induced nuclear reactions