The neutron total cross section of ${}_{}{}^{48}{}_{}{}^{}$Ca+n has been measured up to 10 MeV and analyzed up to 4 MeV using the R-matrix formalism to obtain resonance parameters and potential scattering phase shifts. Very little s-wave neutron strength was observed, and the small cross section (0.5±0.2 b) observed for low-energy neutrons (<150 keV) can be described by a real Woods-Saxon potential with $V_0$=47.3±0.7 MeV, $r_0$=1.21 fm, and a=0.66 fm. Three strong $d_{5/2}$ resonances amounting to 45% of the single-particle width were found in the 0.8- to 2.0-MeV energy region. These results compare well with cross-section predictions from two microscopic calculations. The $p_{1/2}$, $p_{3/2}$, and $d_{3/2}$ resonance strengths are very weak (much smaller than the $d_{5/2}$ strength).

• Received 3 June 1985

DOI:https://doi.org/10.1103/PhysRevC.32.1114