The Z=82 shell closure in neutron-deficient Pb isotopes
نویسنده
چکیده
Recent mass measurements show a substantial weakening of the binding energy difference δ2p(Z,N) = E(Z − 2, N)− 2E(Z,N) +E(Z + 2, N) in the neutron-deficient Pb isotopes. As δ2p is often attributed to the size of the proton magic gap, it might be speculated that reduction in δ2p is related to a weakening of the spherical Z = 82 shell. We demonstrate that the observed trend is described quantitatively by self-consistent mean-field models in terms of deformed ground states of Hg and Po isotopes. PACS. 21.10.Dr – 21.60.Jz – 21.10.Gv – 27.70.+q – 27.80.+w
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تاریخ انتشار 2001