Analysis of proton inclusive spectra from reaction T(d,p)

Full text: Experimental and theoretical studies of few-nucleon nuclear collisions intensively started in 60-70's, lasts up to the present. Investigation of inelastic collisions of deuterons with tritons was restricted within inclusive spectra studying. However, inclusive spectra interpretation can provide us with additional information on processes relative intensity and necessity of taking into account other mechanisms of interaction. Proton inclusive spectra from reaction T(d, p) in the scattering angles range 15 deg≤θp≤ 52 deg at deuteron energy 37 MeV using Kiev isochronous cyclotron U-240 are measured. Experimental technique was described in [1,2]. Mentioned above spectra have broad maxima with fine structure both in low energy and in high energy regions. The characteristic feature of these spectra in high energy region is a sharp decreasing of yield with the increasing of angle up to θp≅35 deg. At θp≥30 deg only two broad maxima are observed. Proton yield smoothly increases with outgoing proton energy rise. Maximal values are achieved at Ep ≅ 10-15 MeV and Ep ≅21-25 MeV. Proton yields in spectra maxima decrease with increase of outgoing proton angle. Analysis of proton energy spectra and proton yield angular distributions was performed using microscopic diffraction model [3]. Interaction of each of two nucleons in deuteron with each of three nucleons in triton and interaction between outgoing particles in final state was considered. The wave function of relative motion is orthogonal to the initial wave function. By this way satisfactory fit of cross section absolute value in the region of first maximum is achieved. But the description of energy spectra and angular distribution of protons with relatively high energies needs to involve reaction mechanism with intermediate 4H* resonances with resonance energies Er = 2.2 MeV and 5.5 MeV. Standard Breight-Wigner resonance cross section dependence was used. Theoretical differential cross section ∂σT/∂Ωp calculated as a sum of total of the diffraction cross section and intermediate resonance cross section satisfactory fits the experiment. References: 1. O.O. Belyuskina, V.I. Grantsev, K.K. Kisurin et al. //Nuclear Physics and Atomic Energy. 2007, No 3(21), p.54-59.; 2. O.O. Belyuskina, V.I. Grantsev, V.M. Lebedev et al. //Nuclear Physics and Atomic Energy. 2007, No 3(25), p.53-61; 3. V.K. Tartakovsky // Izv.vuzov USSR.Physica.1980, No 9, p.3-10. (authors)