Elastic scattering of polarized protons fromFe56in the giant resonance region of

H. R. Weller

¹

,

J. Szücs

²

,

J. A. Kuehner

³

et al.

The $$\overrightarrow p - Si$$ elastic scattering in the region of giant multipole resonances

“…We note that the behavior of fgg/2 in Fig. 4 is qualitatively similar to that of fes/2 from the phase shift analysis of the i~+56Fe data [14]. That is, the fe,/2 trajectory also passes very near to the center of the unitary circle at "resonance" without tracing an approximate circle in the proper direction [28,29].…”

“…Other studies have been carried out in such regions for fi-F 24Mg, fi+27A1, and i~+32S [12]. Weller et al [13,14] have studied fi+l~C and ~+56Fe and they found, from phase-shift analyses of the data, that a single partial wave amplitude had the most significant energy dependence in each case. They then showed that this energy dependence was consistent with a resonance whose parameters were appropriate to those of a giant dipole resonance.…”

Nuclear Physics with Polarized Beams

“…The group at Stanford has also looked at this same region of excitation in 160 through elastic and inelastic scattering of polarized protons on 15N, but preliminary results do not reveal any anomalous behavior indicative of excitation of giant resonances as compound states (La Canna et al 1977). On the other hand, Weller and various collaborators found evidence fo r resonances in elastic scattering on 14C (Weller et al 1974b), 56Fe (Weller et al 1976b), and 1 3C (Weller et al 1978) with quantum numbers consistent with the giant dipole resonance (GDR) built on the ground state ofthe compound nucleus. They measured (J and Ay at many angles as a function of incident energy.…”