The Disintegration of Lithium by Deuteron Bombardment

Abstract

Thin target excitation curves for the ${\mathrm{Li}}^7\mathrm{}(d,n)\mathrm{}$, ${\mathrm{Li}}^6\mathrm{}(d,n)\mathrm{}$, and ${\mathrm{Li}}^7\mathrm{}(d,p)\mathrm{}$ reactions are presented. The neutron data were taken at 90° to the deuteron beam using a B${\mathrm{F}}_3$-filled proportional counter in the long geometry. Resonances were observed in the ${\mathrm{Li}}^6\mathrm{}(d,n)\mathrm{}$ reaction at 0.41 and at 2.12 Mev, in the ${\mathrm{Li}}^7\mathrm{}(d,n)\mathrm{}$ reaction at 0.68, 0.98, and 2.1 Mev, and in the ${\mathrm{Li}}^7\mathrm{}(d,p)\mathrm{}$ reaction at 0.75, 1.00, and 1.4 Mev. These resonances correspond to excited states in ${\mathrm{Be}}^8$ at 22.58 and 23.86 Mev and in ${\mathrm{Be}}^9$ at 17.22, 17.45, 17.8, and 18.3 Mev. The cross section of the resonances observed in the ${\mathrm{Li}}^6\mathrm{}(d,n)\mathrm{}$ reactions were 9 and 41 millibarns/steradian, those for the ${\mathrm{Li}}^7\mathrm{}(d,n)\mathrm{}$ reaction were 39, 43, and 58 millibarns/steradian, and those for the ${\mathrm{Li}}^7\mathrm{}(d,p)\mathrm{}$ reaction were 0.230, 0.235, and 0.255 barn.