Nuclear excitations and reaction mechanisms. Report of progress, February 1, 1975--October 31, 1975. [Summaries of research activities at Brown Univ]
Progress in the following areas of research is reported: Energies of giant isoscalar monopole and quadrupole excitations, energy-weighted sum rules, the random-phase approximation, Hartree-Fock calculations, spreading widths, physical consequences of the locality of current-density commutators and current-current sum rules. Electron-hydrogen scattering using the inhomogenous equation method; variational calculation of e/sup -/ + H scattering using the symmetrized channel coupling array equation; K operators and unitary approximations for the 3-body problem; approximate calculation of model (d-p) and (dd) amplitudes and cross sections; multi-step processes in direct reactions; bound state calculations using the channel coupling array theory. Methods for determining nuclear charge distributions, relativistic effects in nuclei, dispersion corrections and recoil corrections to elastic electron scattering; unitarity of elastic scattering amplitudes; low energy theorems for two-photon processes; pion-exchange contributions to the charge density; recoil effects and energy-dependent Hamiltonians; pion-exchange contributions to two-photon processes; hypervirial theorems for the Dirac equation; Coulomb energies of nuclei. Pion-nucleus scattering, diagonalization of the ..delta..-(nucleon-hole) configurations, doorway states and doorway dominance, calculations for /sup 4/He, discussion of experimental results.
- Research Organization:
- Brown Univ., Providence, R.I. (USA). Dept. of Physics
- OSTI ID:
- 7189960
- Report Number(s):
- COO-3235-71
- Country of Publication:
- United States
- Language:
- English
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