N. Marty

Modele optique pour la diffusion elastique des protons de 75 MeV et 150 MeV

Abstract Cross sections and polarizations have been measured for elastic scattering of 150 MeV protons on C, Ca and Bi and of 75 MeV protons on C, Ca, Ce and Bi. An optical model analysis was made which gives general agreement with parameters extrapolated from lower energy fits. However, at 150 MeV, different radii are needed for the real and imaginary parts of the central potential to fit the polarization curves; negative imaginary spin orbit depth is necessary.

Diffusion élastique et inélastique des protons de 155 MeV sur 24Mg, 28Si, 32S et 40Ca

Abstract The 2s-1d shell nuclei 24 Mg, 28 Si, 32 S and 40 Ca have been studied by elastic and inelastic scattering of 155 MeV protons. Cross sections and polarizations have been measured. An optical-model analysis was performed on the elastic scattering results. The inelastic scattering was interpreted with the DWIA method, the results of these calculations are in general agreement with experiment, but they need some improvement to be quite correct. Cross sections of the (d, p) reactions with 155 MeV protons and (d, p), (d, t) and (d, 3 He) reactions with 82 MeV deuterons have been measured on 27 Al and 28 Si targets; the results are discussed on the basis of Ripkas model.

Excitation du niveau de 15.1 MeV de C12 par diffusion inélastique des protons de 150 MeV

Abstract The excitation of the 15.1 MeV level of C12 (Jπ = 1+, T = 1) by 150 MeV protons has been studied. The angular distribution of the scattered protons in coincidence with the de-excitation γ rays emitted in the recoil direction of the nucleus has been determined. The angular correlation between inelastically scattered protons and γ rays has been measured at a scattering angle of 8°.