Coulomb-nuclear Interference Region Research Articles

Polarization in Heavy-Ion Inelastic Scattering in the Coulomb-Nuclear Interference Region

The polarization in the region of Coulomb-nuclear interference has been determined from the $\ensuremath{\gamma}$-ray correlation following excitation of the 856-keV ${2}^{+}$ state in $^{56}\mathrm{Fe}$ by 43-MeV $^{16}\mathrm{O}$ ions. Elastic and inelastic scattering cross sections were also measured. Dramatic interference effects are observed in the transition amplitudes which can be reproduced by coupled-channel distorted-wave calculations.

Nuclear-Coulomb Interference inπ+-C12Scattering

The small-angle scattering of ${\ensuremath{\pi}}^{+}$ from $^{12}\mathrm{C}$ was measured at 115, 167, and 242 MeV. The measurements covered the Coulomb-nuclear interference region from 3\ifmmode^\circ\else\textdegree\fi{} to 10\ifmmode^\circ\else\textdegree\fi{}. The real part of the forward nuclear amplitude was extracted from the data.

Small-angle proton - proton scattering cross-sections at 144 MeV

The differential cross-section in proton-proton scattering at 144 ± 1.5 MeV has been measured over the Coulomb-nuclear interference region. When the present data are included in a phase-shift analysis the resultant phas-shifts are only slightly changed from their previous values.

Proton-proton total cross-sections between 179 and 555 MeV

Proton-proton total cross-sections have been measured at nine different energies between 179 and 555 MeV (607 and 1162 MeV/ c) with a typical accuracy of 0.9%. The accuracy is limited by a poor knowledge of the Coulomb-nuclear interference region in elastic scattering.

Elastic scattering of 24.4 MeV deuterons by protons

The differential cross section for the elastic scattering of 24.4 MeV deuterons by protons (equivalent to 12.2 MeV p−d scattering) has been measured at angles between 15° and 170° in the centre of mass system with an overall accuracy of the order of 3%. The measurements stand in good agreement with recent measurements near 10 and 14 MeV and show the same apparent disagreement with the theory of Christian and Gammel in the Coulomb-nuclear interference region.