Abstract
A high precision study of the gamma ray spectrum following neutron capture by a target of natural sulfur is reported. The energy precision obtained has permitted construction of decay schemes for33S and35S. In the case of the former isotope a total of 22 levels have been identified while for the latter and much weaker reaction 7 states have been observed. While some transitions attributable to capture by33S are observed, their weakness prohibited detailed analysis. The neutron separation energies, based upon the14N(n, γ)15N standard are found to be 8,641.60 (3) keV and 6,985.84 (5) keV for33S and35S respectively.
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The authors gratefully acknowledge the financial assistance of the National Sciences and Engineering Research Council of Canada and the government of Ontario.