Spin structure of the charge-exchange process n + p {yields} p + n at zero angle

Journal Article · Wed Jun 13 04:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2750896· OSTI ID:21064034

Lyuboshitz, V L; Lyuboshitz, V V ^[1]

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1. Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region (Russian Federation)

The structure of the nucleon charge-exchange process n + p {yields} p + n is investigated basing on the isotopic invariance of the nucleon-nucleon scattering. Using the operator of permutation of the spin projections of the neutron and proton, the connection between the spin matrices, describing the amplitude of the nucleon charge-exchange process at zero angle and the amplitude of the elastic scattering of the neutron on the proton in the ''backward'' direction, has been obtained. Due to the optical theorem, the spin-independent part of the differential cross-section of the process n + p {yields} p + n at zero angle for unpolarized particles is expressed through the difference of total cross-sections of unpolarized proton-proton and neutron-proton scattering. Meantime, the spin-dependent part of this cross-section is proportional to the differential cross-section of the deuteron charge-exchange breakup d + p {yields} (pp) + n at zero angle at the deuteron momentum kd = 2kn (kn is the initial neutron momentum). Analysis shows that, in the wide range of neutron laboratory momenta kn > 700 MeV/c, the main contribution into the differential cross-section of the process n + p {yields} p + n at zero angle is provided namely by the spin-dependent term.

• OSTI ID: 21064034
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 915; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHARGE EXCHANGE
DEUTERON REACTIONS
DEUTERONS
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
MATRICES
MEV RANGE
NEUTRON REACTIONS
NEUTRONS
OPTICAL THEOREM
PROTON-NEUTRON INTERACTIONS
PROTON-PROTON INTERACTIONS
PROTONS
QUANTUM OPERATORS
SCATTERING AMPLITUDES
SPIN
TOTAL CROSS SECTIONS