The random-phase approximation has been treated in two steps: (a) First, we solve the so-called nuclear structure problem in which the single particle continuum states are excluded. (b) In the second part, we include the continuum utilizing a reformulated version of the random-phase approximation which uses the outcome of the nuclear structure method as an input. Thus the effect of the continuum is directly estimated. Below threshold the excitation energies are shifted; above threshold they obtain additionally a width. Numerical results are presented for ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ and ${}_{}{}^{16}{}_{}{}^{}\mathrm{N}$.

NUCLEAR STRUCTURE RPA calculations for ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ and ${}_{}{}^{16}{}_{}{}^{}\mathrm{N}$ including continuum.

• Received 13 November 1978

DOI:https://doi.org/10.1103/PhysRevC.19.1553