The 2H(p, d★)1H cross section from the 2H(p,pn)1H reaction

Abstract

Abstract Three-body break-up spectra from a kinematically complete measurement of the 2H(p, pn)1H reaction have been analyzed to yield the cross section for the production of d∗ (a neutron and a proton in a S = 0, T = 1 configuration). A 27.5 MeV deuteron and a 13.5 MeV proton beam were used, and proton and neutron were detected in coincidence at the same angle to enhance the detection of 2H(p, d∗)1H or (d, d∗)1H events. The data were analyzed in terms of the Phillips-Griffy-Biedenharn model of final-state interaction. Only the n-p FSI contribution gives a structure in all observed spectra; other processes have essentially the same smooth shape in the region of the peak. An angular distribution of the 2H(p, d∗)1H reaction was obtained between θ d ∗ c.m. = 23° and θ d ∗ c.m. = 155° for the c.m. energy of 9.1 MeV. Other measurements for the 1H(d, d∗)1H reaction were also obtained at forward angles for the deuteron bombarding energy range 19.2, 27.5 MeV (which corresponds to 3He excitation energies between 11.8 and 14.7 MeV): the 1H(d, d∗)1H excitation function shows no structure in this range.