The total cross section of sulfur has been measured for neutrons of energies from 15 to 1450 kev with energy spreads between 1.5 and 9 kev. Below 750 kev, nine well-defined maxima are observed, three of which are interpreted as caused by $s$-neutrons; the others are believed to be produced by $p$- or $d$-neutrons. The $s$-resonances have natural widths of about 15 kev, while one of the other resonances which was studied in detail has a width of 1.5 kev. In the case of the latter resonance, the compound nucleus appears to be formed with spin of $\frac{3}{2}$. Above 750 kev neutron energy the density of observed levels increases, and no interpretation of the resonances was attempted.

• Received 5 May 1950

DOI:https://doi.org/10.1103/PhysRev.79.593