This Letter reports a study of the highly debated ${}^{10}\mathrm{Li}$ structure through the $d({}^9\mathrm{Li},p){}^{10}\mathrm{Li}$ one-neutron transfer reaction at 100 MeV. The ${}^{10}\mathrm{Li}$ energy spectrum is measured up to 4.6 MeV and angular distributions corresponding to different excitation energy regions are reported for the first time. The comparison between data and theoretical predictions, including pairing correlation effects, shows the existence of a $p_{1/2}$ resonance at $0.45\pm 0.03\mathrm{MeV}$ excitation energy, while no evidence for a significant $s$-wave contribution close to the threshold energy is observed. Moreover, two high-lying structures are populated at 1.5 and 2.9 MeV. The corresponding angular distributions suggest a significant $s_{1/2}$ partial-wave contribution for the 1.5 MeV structure and a mixing of configurations at higher energy, with the $d_{5/2}$ partial-wave contributing the most to the cross section.

• Received 26 January 2016

DOI:https://doi.org/10.1103/PhysRevLett.118.012701