STUDY OF DOUBLET PROTON-DEUTERON BREAKUP AT E p = 50 MeV

Publisher Summary This chapter discusses a study of doublet proton–deuteron breakup at EP = 50 MeV. It presents first results on the p+d→ppn reaction at EP = 50 MeV, obtained with the BOL multidetector system and the synchro-cyclotron at IKO. The data selected concern a very special region of the phase space in the final state, namely, the one near the point where the p–p quartet amplitude vanishes. In a few recent theoretical investigations, using various potentials for the nucleon–nucleon interaction, Kloet and Tjon found that in this region, the theoretical n–d breakup cross section exhibits a deep minimum, which is sensitively dependent on the core region of the potential, used in their Faddeev calculation. This can be understood because the doublet amplitude tends to be more sensitive to the inner part of the N–N potential than the quartet amplitude because the Pauli principle is less operative in the doublet configuration. Proton–proton coincidences, recorded on magnetic tape during 60 h of measuring, were afterward identified and calibrated in energy and angle.