Momentum spectra have been measured for the reaction ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$${(}^7$Li${,}^8$B${)}^{10}$Li at 130 MeV and laboratory angles of 5° and 3.5°. There is strong evidence for the existence of a broad state in the unstable nucleus ${}_{}{}^{10}{}_{}{}^{}\mathrm{Li}$, corresponding to a single p-wave neutron resonance unbound to neutron decay by 538±62 keV with wdith ${\mathrm{\Gamma }}_{\mathrm{lab}}$=358±23 keV. There is also weak evidence that the ${}_{}{}^{10}{}_{}{}^{}\mathrm{Li}$ ground state may be either an s- or a p-wave resonance barely unbound to neutron decay with ${\mathit{S}}_{\mathit{n}}$≥-100 keV and ${\mathrm{\Gamma }}_{\mathrm{lab}}$<230 keV. The measured Q values for the reaction leading to these states are -32 908±62 keV and greater than -32 471 keV, respectively. A comparison is made with previous measurements and theoretical predictions of the low-lying structure of the neutron-unstable nucleus ${}_{}{}^{10}{}_{}{}^{}\mathrm{Li}$.

• Received 23 June 1993

DOI:https://doi.org/10.1103/PhysRevC.49.279