Roles of proton-neutron interactions in alpha-like four-nucleon correlations
Abstract
An extended pairing plus QQ force model, which has been shown to successfully explain the nuclear binding energy and related quantities such as the symmetry energy, is applied to study the alpha-like four-nucleon correlations in 1f7/2 shell nuclei. The double difference of binding energies, which displays a characteristic behavior at N ≈ Z, is interpreted in terms of the alpha-like correlations. Important roles of proton-neutron interactions forming the alpha-like correlated structure are discussed.
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