Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2003-01-28
Phys.Rev. C67 (2003) 014326
Physics
Nuclear Physics
Nuclear Theory
26 pages, 8 figures, typeset using REVTeX
Scientific paper
10.1103/PhysRevC.67.014326
We compute the distribution of quasideuterons in doubly closed shell nuclei. The ground states of $^{16}$O and $^{40}$Ca are described in $ls$ coupling using a realistic hamiltonian including the Argonne $v_{8}^\prime$ and the Urbana IX models of two-- and three--nucleon potentials, respectively. The nuclear wave function contains central and tensor correlations, and correlated basis functions theory is used to evaluate the distribution of neutron-proton pairs, having the deuteron quantum numbers, as a function of their total momentum. By computing the number of deuteron--like pairs we are able to extract the Levinger's factor and compare to both the available experimental data and the predictions of the local density approximation, based on nuclear matter estimates. The agreement with the experiments is excellent, whereas the local density approximation is shown to sizably overestimate the Levinger's factor in the region of the medium nuclei.
Benhar Omar
Fabrocini Adelchi
Fantoni Stefano
Illarionov Alexei Yu.
Lykasov Gennadi I.
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