Influence of Coulomb-nuclear interference on the deuteron spin dichroism phenomenon in a carbon target in the energy interval 5–20 MeV

Production of a Beam of Tensor-Polarized Deuterons Using a Carbon Target

“…The results allow one to produce tensor-polarized deuterons with p zz around À0:30 (or þ0:25) from an initially unpolarized beam using a carbon target of appropriate thickness. DOI: 10.1103/PhysRevLett.104.222501 PACS numbers: 13.88.+e, 24.70.+s, 25.45.De, 29.27.Hj Nuclear spin dichroism leads to the appearance of tensor polarization in an initially unpolarized, forwardtransmitted beam of (spin 1) deuterons behind a target composed of spin-zero nuclei, like carbon [1]. The direction of primary and transmitted beam defines the quantization axis, and because of azimuthal symmetry, the beam behind the target is described by the tensor polarization…”

“…Recently, the deuteron-carbon interaction at deuteron energies of 5 to 20 MeV has been investigated theoretically [1]. The optical theorem relates the cross-section difference in Eq.…”

“…Nuclear spin dichroism leads to the appearance of tensor polarization in an initially unpolarized, forwardtransmitted beam of (spin 1) deuterons behind a target composed of spin-zero nuclei, like carbon [1]. The direction of primary and transmitted beam defines the quantization axis, and because of azimuthal symmetry, the beam behind the target is described by the tensor polarization p zz ð dÞ ¼ n þ1 ð dÞ þ n À1 ð dÞ À 2n 0 ð dÞ; (1) where is the number density of nuclei in the target (per unit of volume) and d its thickness (in units of length).…”

“…The direction of primary and transmitted beam defines the quantization axis, and because of azimuthal symmetry, the beam behind the target is described by the tensor polarization p zz ð dÞ ¼ n þ1 ð dÞ þ n À1 ð dÞ À 2n 0 ð dÞ; (1) where is the number density of nuclei in the target (per unit of volume) and d its thickness (in units of length). The n m denote the normalized occupation numbers of deuterons in the magnetic substates m ¼ þ1, À1, and 0.…”

“…The difference f 0 0 ðEÞ À f 0 AE1 ðEÞ is calculated in Ref. [1] in eikonal approximation for E ) V d with a correction term for E V d . Neglecting changes in the deuteron wave function in the interaction process, the main contributions to the difference are due to the nuclear interaction of neutron and proton in the deuteron with target nucleons (NN), and the interference in the nuclear and Coulomb interaction of the nucleons (NNC).…”