Physics
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..899..117o&link_type=abstract
SIXTH INTERNATIONAL CONFERENCE OF THE BALKAN PHYSICAL UNION. AIP Conference Proceedings, Volume 899, pp. 117-118 (2007).
Physics
Properties Of Nuclei, Nuclear Energy Levels, Nuclear Structure Models And Methods, 150<=A<=189
Scientific paper
Empirical values of the average interactions of the last two protons and last two neutrons, δVpn, which can be obtained from double differences of binding energies, provide significant information about nuclear structure. Studies of δVpn showed striking behavior across major shell gaps and the relation of proton-neutron (p-n) interaction strengths to the increasing collectivity and onset of deformation in nuclei. Here we focus on the strong regularity at the δVpn values in A~150-180 mass region. Experimentally, for each nucleus, the valence p-n interaction strengths increase systematically against the neutron number and it decreases for the observed last neutron number. These experimental results give almost nearly perfect parallel trajectories. A microscopic interpretation with a zero range δ-interaction in a Nilsson basis gives reasonable agreement for Er-W but more significant discrepancies appear for Gd and Dy.
Brenner Daeg S.
Cakirli R. B.
Casperson R. J.
Casten R. F.
Oktem Y.
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