Nuclear and neutron matter calculations with different model spaces
Abstract
In this work we investigate the socalled modelspace BruecknerHartreeFock (MBHF) approach for nuclear matter as well as for neutron matter and the extension of this which includes the particleparticle and holehole (PPHH) diagrams. A central ingredient in the modelspace approach for nuclear matter is the boundary momentum k_{M} beyond which the singleparticle potential energy is set equal to zero. This is also the boundary of the model space within which the PPHH diagrams are calculated. It has been rather uncertain which value should be used for k_{M}. We have carried out modelspace nuclear matter and neutron matter calculations with and without PPHH diagrams for various choices of k_{M} and using several modern nucleonnucleon potentials. Our results exhibit a saturation region where the nuclear and neutron matter energies are quite stable as k_{M} varies. The location of this region may serve to determine an "optimum" choice for k_{M}. However, we find that the strength of the tensor force has a significant influence on the variations of binding energy with k_{M}. The implications for nuclear and neutron matter calculations are discussed.
 Publication:

Nuclear Physics A
 Pub Date:
 February 1997
 DOI:
 10.1016/S03759474(97)806999
 arXiv:
 arXiv:nuclth/9703005
 Bibcode:
 1997NuPhA.622..553E
 Keywords:

 Nuclear Theory
 EPrint:
 24 pages, Elsevier LaTeX style, 17 figs included