Calculation of multichannel reactions in the four-nucleon system above breakup threshold

Abstract

Exact four-body equations of Alt, Grassberger and Sandhas are solved for neutron-${}^3\mathrm{He}$ and proton-${}^3\mathrm{H}$ scattering in the energy regime above the four-nucleon breakup threshold. Cross sections and spin observables for elastic, transfer, charge-exchange, and breakup reactions are calculated using realistic nucleon-nucleon interaction models, including the one with effective many-nucleon forces due to explicit $\Delta$-isobar excitation. The experimental data are described reasonably well with only few exceptions such as vector analyzing powers.

5 pages, 6 figures, to be published in Phys. Rev. Lett

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• Deuteron-deuteron scattering above four-nucleon breakup threshold
• Four-body calculation of elastic deuteron-deuteron scattering
• Core excitation in three-body nuclear reactions: Improved nucleon-core potential
• Proton-${}^3$H scattering calculation: Elastic and charge-exchange reactions up to 30 MeV
• Three-cluster breakup in deuteron-deuteron collisions: single-scattering approximation
• Nucleon-nucleon scattering with the Complex Scaling Method and realistic interactions
• Calculation of expectation values of operators in the Complex Scaling method
• Four-body system of ${}^4\mathrm{He}$ atoms: Dimer-dimer scattering
• Precision measurements of differential cross sections and analyzing powers in elastic deuteron-deuteron scattering at 65 MeV/nucleon
• Transfer reactions as a Tool in Nuclear Astrophysics
• Examination of the multiple-scattering expansion in the four-nucleon system