Nguyen Van Sen

Elastic scattering of polarized deuterons by protons at intermediate energies

Abstract The tensor analyzing power T 20 ( θ ) in dp backward scattering has been measured at or near center-of-mass angle θ = 180° in the energy range 0.3–2.3 GeV. A pronounced structure is observed around T d = 0.5 GeV which is explained by a predominant one-neutron-exchange mechanism. Other structures appear around 1 GeV and higher. They are not explained by calculations which include Δ-excitations in intermediate states. In addition, full angular distributions of vector A y and tensor A yy analyzing powers and differential cross sections have been obtained at 1.2 GeV and limited angular ranges explored at 0.5 GeV (back angles) and 1.6 GeV (forward angles).

Measurements of vector and tensor analysing powers for 191 and 395 MeV deuteron scattering

Abstract Vector ( iT 11 ) and tensor ( T 20 and T 22 ) analysing powers for 191 and 395 MeV deuterons are reported for dp and dd elastic scattering and d-nucleus (Li, C, Ni, Pb) inclusive scattering with a rough selection on the outgoing deuteron energy. Applications to and the feasibility of intermediate energy deuteron polarimeters are discussed.

Elastic scattering of polarised deuterons from 16O at 200, 400 and 700 MeV☆

Abstract Angular distributions of cross section, and A y and A yy analysing powers were measured for polarised deuteron elastic scattering from 16 O at 200, 400 and 700 MeV. The data at 200 MeV bear evidence of the nuclear rainbow phenomenon while those at 400 and 700 MeV are reminiscent of the proton scattering results at equivalent energies. The data were analysed in terms of the optical model. The real central potential shape changes from an attractive Woods-Saxon form at 200 MeV to a wine-bottle-bottom form with a repulsive interior at 700 MeV. The total reaction cross sections deduced display a clear nuclear transparency effect in the present energy domain in agreement with predictions from the Glauber theory optical limit. Comparison with previous results for 40 Ca and 58 Ni targets is made.

Vector and tensor analyzing powers in deuteron-proton elastic scattering atEd=70 MeV

Angular distributions of analyzing powersAyandAyyhave been measured ind-p elastic scattering at 70 MeV. The data are compared with Faddeev calcuiations using various tensor nucleon-nucleon interactions.