Polarization effects in the 2H(3He, tp)p reaction at E = 33 MeV
ABSTRACT Triple-differential cross sections and vector analyzing powers have been measured for the 2H(3He, tp)p reaction at EHe = 32.5 MeV. Data are presented for ten pairs of lab angles in the range θt = 15°–30°, θp = 20°–55°, most of which correspond to the kinematic region in which the quasi-free 3He + n → t + p reaction with the unobserved proton as spectator is expected to be the dominant mechanism. In addition to the usual QFR maximum, most of the energy-sharing distributions of cross section exhibit a smaller maximum at lower energy along the kinematic locus in the Et, Ep plane. The analyzing power is generally negative in the vicinity of the QFR peak, but exhibits a maximum in the region between the two peaks in the cross section. This behavior is reproduced by distorted-wave impulse-approximation calculations which include coherently amplitudes corresponding to the cases in which each of the two protons in the final state are the spectator. The best agreement with the data is obtained when the radial integrals are cut off at a maximum radius of ~ 15 fm. The predicted analyzing powers show little sensitivity to the parameters of the two-body reaction, but rather depend almost entirely on the spin-orbit terms in the distorting potentials, a behavior which is similar to that observed in nucleon-transfer reactions involving a transferred orbital angular momentum of zero.
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ABSTRACT: A review of the evidence on the properties of the nuclei A=5, 6 and 7, with emphasis on material leading to information about the structure of the A=5, 6, 7 systems. (References closed 23 August 2001.)Nuclear Physics A 09/2002; 708(1):3-163. DOI:10.1016/S0375-9474(02)00597-3 · 2.50 Impact Factor
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ABSTRACT: The 3He breakup reaction has been studied with 59.6 MeV vector-polarized deuterons at dp quasifree-scattering (QFS) conditions. In the coincidence energy spectra, large bumps corresponding to the QFS were observed. The calculation in the simple plane-wave impulse approximation (PWIA) qualitatively reproduces the energy spectra, but for the absolute cross sections, the ratio of the experimental values to the calculated values in the PWIA is about 0.27. As for the analyzing powers, the experimental values are greatly reduced as compared with the dp elastic-scattering data. The multiple-scattering effect has been investigated by a calculation taking account of the effects of double-scattering terms on the cross sections and the analyzing powers.Nuclear Physics A 06/1995; 588(2):510-520. DOI:10.1016/0375-9474(95)00015-S · 2.50 Impact Factor
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ABSTRACT: The d + t → d + d + n reaction was experimentally and theoretically investigated at an incident deuteron energy of 36.9 MeV. The experiment was performed on the U-240 isochronous cyclotron at the Institute for Nuclear Research, National Academy of Sciences of Ukraine. Inclusive spectra of deuterons and their angular distributions in the range of 15° ≤ θd ≤ 52° were measured. Experimental spectra and angular distributions of the final deuterons from the d + t → d + d + n reaction are satisfactorily described in a diffraction approximation that considers interaction in the final state and the correct asymptotic of the wave function of colliding nuclei. The scattered deuterons are the main contributors to the cross section (up to 70–90%), while the deuterons from tritons can be seen well only at low and high energies, at the edges of the spectra.Bulletin of the Russian Academy of Sciences Physics 07/2011; 75(7):925-930. DOI:10.3103/S1062873811070070