Reorientation Measurement in ⁵⁶Fe

Abstract

The reorientation effect in Coulomb excitation has been used to measure the static quadrupole moment of the first 2 + level of 56 Fe. Using beams of 4 He and 16 O on thin highly enriched targets and observing the spectrum of scattered particles in semiconductor detectors, we have obtained directly the ratios of inelastic to elastic cross sections. The measurements give[Formula: see text]The ambiguity arises from uncertainty in the relative signs of interfering matrix elements.For the case of He scattering, DWBA calculations were carried out to check the energy region where nuclear interaction begins to appear.