Momentum Distribution of Nucleons in Asymmetric Nuclear Matter

Key words: 
• asymmetric nuclear matter /
• Brueckner theory /
• momentum distribution /
• quasiparticle strength

Abstract:  We calculate the momentum distribution of nucleons in asymmetric nuclear matter within the framework of the extended BruecknerHartreeFock approximation at zero temperature, use Argonne V18 potential as two nucleons potential. The isospinasymmetry dependence of the nucleon momentum distribution predicted and discussed. It is shown that as the asymmetry increases, the proton momentum distribution become smaller while the neutron one gets higher below their respective Fermi surfaces with respect to their common values in symmetric nuclear matter. The quasiparticle strength at the Fermi momentum also calculated and discussed, we got an improved fulfillment of the Migdal Luttinger theorem and nucleon number conservation.