✍ Scribed by H.W Newson; W.F.E Pineo; B.-H Choi; J.M Clement; M Divadeenam
No coin nor oath required. For personal study only.
A multilevel R-matrix analysis of Si neutron cross-section data measured at NBS has been performed up to about 4.5 MeV neutron energy. Only a small fraction of the p-and s-wave s.p. strength is observed, but both exhibit local concentrations of strength indicative of doorway structure around 1 and 0.2 MeV, respectively. Besides the wellknown 180 keV, strong, $+ resonance, the s-wave resonance structure is of moderate strength and widely distributed. The f-and d-wave assignments are not unambiguous, but J > -$ resonances show strong signs of intermediate structure for d-waves. A possible correlation between neutron and gamma decay channels and the connection between the states observed in (n, n), (d,p), (n, r), and (r, n) channels is discussed. A coreparticle doorway interpretation for s and p-waves is presented.
📜 SIMILAR VOLUMES
A core-particle calculation developed to describe the low-lying structure of Y3i is extended above neutron threshold energy to yield information on the structure of doorway states indicated by the Yii + n reaction. The recent experimental evidence for a J = #-doorway state common to the YSi + n and