Excited States inB10andBe8

A new technique for detecting neutron thresholds by using a slow neutron counter and a conventional long counter is described. By means of this technique, neutron thresholds from the deuteron bombardment of ${\mathrm{Li}}^7$ have been studied at energies from 0.4 Mev to 4.7 Mev. Thresholds were observed at energies of 1.34, 2.18, 3.37, 3.6, and 4.07 Mev. These thresholds indicate excitation levels in ${\mathrm{Be}}^8$ at 16.06, 16.72, 17.65, 17.8, and 18.19 Mev.