29 Si(α, n) 32 S reaction from 2.15 to 5.25 MeV bombarding energy

Levels in the compound nucleus 33 S have been investigated by measuring the reaction cross section for the reaction 29 Si(α, n) 32 S for incident a energies from 2.15 to 5.25 MeV, mostly in steps of 2.5 keV, using a 4π -geometry neutron counter. One hundred and thirty-four resonances have been identified. The reciprocity theorem has been used to calculate the total cross section for the inverse reaction 32S(n, α) 29 Si. Total widths have been determined for 107 resonances, and partial widths Γ α , Γ n and corresponding reduced widths γ α 2 , γ n 2 have been extracted for 19 cases where spin values are known. Statistical strength function analysis of the cross section under the excitation curve gave the averaged a particle strength function value as S¯ α =0.067±0.012 for this reaction.