L. Sydow

Study of the kinematically complete breakup reaction 2H(p̄, pp)n at Ep = 3 Mev with polarized protons

Abstract The breakup reaction 2 H(p, pp)n at E p = 13.0 MeV has been measured in a kinematically complete experiment with polarized protons in four special kinematical situations: np final-state interaction, pp quasi-free scattering, collinearity and symmetric space star. These configurations are identical to those of a corresponding 2 H(n, nn) 1 H experiment. The cross sections d 3 σ/ d Ω 3 d Ω 4 d S and the vector analyzing powers A 1 are presented as a function of the arclenght of the relevant kinematical loci. They are compared to the rigorous Faddeev calculations using realistic meson-exchange NN potentials, i.e. the Paris and Bonn potential. Comparison with the cross section data of the analog neutron experiment is made. In the quasi-free scattering and the space-star cross sections marked discrepancies with the theoretical predictions, in the latter case also with the neutron results are found. In the collinear and final-state interaction situations the agreement is rather good as well as for all analyzing powers and is even improved by taking the finite angular spread into account.

Global optical model potentials for symmetrical lithium systems: 6Li+6Li, 7Li+7Li at Elab = 5–40 MeV☆

Abstract Angular distributions of 6 Li+ 6 Li elastic scattering were measured for E lab = 5–40 MeV. An optical model analysis of these data together with older data of 7 Li+ 7 Li elastic scattering taken at E lab = 8–17 MeV was performed with the aim to search for a “global” OM potential which describes elastic scattering in both LiLi systems in a broad energy range. Both surface and volume absorbing potentials can be found which fulfill this requirement if a linear energy dependence is assumed of the depths of the real as well as the imaginary potential. These depths, if fitted to individual angular distributions, are found to vary in a correlated manner with the beam energy. This is taken as indication of strong coupling between elastic, inelastic, and reaction channels. This is corroborated by the existence of resonances in reaction channels at these energies where the potential depths are most pronouncedly changing.

Measurement of\(D(\vec p,p)D\) elastic scattering at 10.0, 12.0, 14.1 and 16.5 MeV especially for small forward and extreme backward scattering angles

AbstractThe

Potential interaction and transfer in elastic 7Li(6Li,6Li)7Li and inelastic 7Li(6Li,6Li)7Li0.48 scattering at Elab = 9–40 MeV

D(\vec p,p)D

Optimized polarimetry for polarization-transfer experiments with protons and deuterons

elastic scattering was investigated especially in the Coulomb sensitive scattering regions. Angular distributions of the differential cross section and of the analyzing powerAy, with emphasis on small scattering angles, were measured at 10.0 and 14.1 MeV. For extreme backward angles up toJc.m.=179° the differential cross section was measured at 12.0, 14.1 and 16.5 MeV. The data have been compared with recent Faddeev calculations based on the realistic meson-exchange Paris potential and including an approximate Coulomb correction. There are discrepancies between the data and the calculations especially for the analyzing power. This indicates that the approximate treatment of Coulomb effects and possibly also the purely nuclear part of the calculations need to be improved.

Non-suppression of quintet states in the tensor analyzing powers of the D+D fusion reactions at Ecm=14 keV☆

AbstractAngular distributions of the four analyzing powers of the mirror fusion reactions D(

A test of parity conservation in the reaction 27Al(p, α)24Mg in the regime of Ericson fluctuations

\vec d