Non-empirical pairing energy density functional First order in the nuclear plus Coulomb two-body interaction

作者：Lesinski T^*; Duguet T; Bennaceur K; Meyer J

来源：European Physical Journal A, 2009, 40(2): 121-126.

DOI：10.1140/epja/i2009-10780-y

We perform systematic calculations of pairing gaps in semi-magic nuclei across the nuclear chart using the Energy Density Functional method and a non-empirical pairing functional derived, without further approximation, at lowest order in the two-nucleon vacuum interaction, including the Coulomb force. The correlated single-particle motion is accounted for by the SLy4 semi-empirical functional. Rather unexpectedly, both neutron and proton pairing gaps thus generated are systematically close to experimental data. Such a result further suggests that missing effects, i.e. higher partial waves of the NN interaction, the NNN interaction and the coupling to collective fluctuations, provide an overall contribution that is sub-leading as for generating pairing gaps in nuclei. We find that including the Coulomb interaction is essential as it reduces proton pairing gaps by up to 40%.

• 出版日期2009-5
• 单位中国地震局