Dean Halderson

Evidence for the 1/2{sup -} state in {sup 7}He

Two recent experiments yield conflicting results on the possibility of a low-lying 1/2{sup -} state in {sup 7}He at E{sub n}{sup c.m.}{approx}1 MeV. A calculation with the recoil corrected continuum shell model reproduces this state as well as results that are compatible with the data from both reports, but only with the conclusion of one.

RelativisticRmatrix and continuum shell model

Background: The

p-shell {lambda} hypernuclei with the Nijmegen ESC04 baryon-baryon potential

R

Reaction matrix calculation of /sup 4/He with three- and four-particle correlations

matrix formalism of Lane and Thomas has proven to be a convenient reaction theory for solving many-coupled channel systems. The theory provides solutions to bound states, scattering states, and resonances for microscopic models in one formalism. nPurpose: The first purpose is to extend this formalism to the relativistic case so that the many-coupled channels problem may be solved for systems in which binary breakup channels satisfy a relative Dirac equation. The second purpose is to employ this formalism in a relativistic continuum shell model. nMethods: Expressions for the collision matrix and the scattering amplitude, from which observables may be calculated, are derived. The formalism is applied to the 1p-1h relativistic continuum shell model with an interaction extracted from relativistic mean-field theory. nResults: The simplest of the

{sigma}({gamma},p)/{sigma}({gamma},n) ratio, current conservation, and nucleon scattering in {sup 4}He

sigma +omega +rho

Origin of anomalous values ofσ(π+,π+′p)/σ(π−,π−′p)

exchange interactions produces a good description of the single-particle energies in

Procedure for calculating the structure of hypernuclei

^{16}

Realistic calculations for strangeness exchange at rest.

O and

Λ-hypernuclear binding energy test of the refit Nijmegen soft coreYNpotential

^{90}

Nijmegen soft coreYNpotential with bound state restrictions

Zr and a reasonable description of proton scattering from