Observation of a narrow structure in the pp elastic scattering at T{sub kin} = 2.11 GeV

The angular dependences of the pp elastic scattering analyzing power, spin correlation, depolarization transfer were measured in the angular range from 60{degrees} to 97{degrees} CM at 14 energies between 1.96 and 2 .23 GeV. At fixed angles two maxima were observed in the analyzing Power energy dependence, both below and above 2.11 GeV. Furthermore a rapid decrease Of the spin correlation Parameter at 90{degrees} CM occurs around this energy. The observables allow determination of the absolute values of three nonvanishing pp amplitudes at 90{degrees}. The energy dependence of the spin-single amplitude shows a shoulder centered at 2.11 GeV, while the spin-triplet amplitudes are decreasing functions of energy snowing no evidence of structure. All experimental data are listed in tables and their energy dependences are shown in figures

SATURNE LATEST RESULTS FOR POLARIZED BEAMS

Les intensités en protons et en deutons ont pu être progressivement portées à 2.1011 particules/cycle depuis la mise en service de MIMAS en 1987 et grâce aux améliorations faites sur la source. Il n'y a pas de résonance de dépolarisation en deutons. Les résonances de dépolarisation en protons dans MIMAS et SATURNE ont fait l'objet d'études systématiques jusqu'à l'énergie maximale de SATURNE (2.91 GeV). Compte tenu des améliorations encore possibles sur la source et moyennant une injection a énergie plus élevée dans MIMAS une intensité de 5.1011 p ou d par cycle est possible.The intensities for polarized protons or deuterons have been reached up to 2.1011 p or d by cycle since MIMAS operation in 1987 and also with the last improvements of the source. There is no depolarization for deuterons but for protons all the depolarizations in MIMAS and SATURNE have been studied up to the maximum energy. With the possible improvements on the source, associated to an higher injection energy into MIMAS, intensities up to 5.1011 p or d are possible

POLARIZED LITHIUM-6 BEAM AT SATURNE

The SATURNE synchrotron facility is now equipped with a polarized Lithium-6 ion source for nuclear physics experiments. The source is an arrangement of a conventional polarized atomic beam and a ionizer injecting the Li1+ ions into the Saturne EBIS, DIONÉ. The Li1+ ions are trapped and ionized inside the EBIS electron beam. After acceleration through the RFQ, Li3+ ions are injected into MIMAS