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
s- and p-wave neutron spectroscopy Xf(ii). Intermediate structure in the 28Si + n reaction: Doorway state calculation
✍ Scribed by D Halderson; B Castel; M Divadeenam; H.W Newson
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 375 KB
- Volume
- 103
- Category
- Article
- ISSN
- 0003-4916
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✦ Synopsis
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 the '9i + y channels is supported by the calculation which also reproduces correctly the magnitudes of the neutron escape widths and the El radiative strengths of the $-doorway states.
THE MODEL
📜 SIMILAR VOLUMES
## 229 photon energy. In particular, the dominant scattering mechanism for small carrier concentrations is found to be polar optical mode scattering, which exhibits a X3 dependence of the absorption coefficient times the index of refraction, (except at the lowest frequencies, where the expected X2