Astrophysical S factor for the {sup 7}Li(d,n{sub 0}){sup 8}Be and {sup 7}Li(d,n{sub 1}){sup 8}Be reactions

The absolute astrophysical S factor and cross section for the {sup 7}Li(d,n{sub 0}){sup 8}Be and {sup 7}Li(d,n{sub 1}){sup 8}Be reactions have been determined using deuteron beams with energies between 45 and 80 keV. The slope of the S factor is consistent with zero in the n{sub 0} case but is slightly negative in the n{sub 1} case. The S factor for the sum of both neutron groups at c.m. energies below 70 keV is S(E)=5400({+-}1500)-37({+-}21)E keV b, where E is the c.m. energy in keV.