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Nuclear Physics A

Volume 520, December 1990, Pages c251-c258
Nuclear Physics A

Empirical estimates of the proton-neutron interaction and diabolical points

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Abstract

The use of constant-N contours in the (ω,λ) plane is demonstrated both for establishing diabolical points and for studying regularities and fluctuations in the spectrum of single-particle states. Likewise the average properties and fluctuations of empirical proton-neutron interactions, obtained from double differentials of the total energy with respect to N and Z, are discussed for the ground states of all even-even nuclei with N>40 and as a function of the rotational frequency for the lowest even spin, positive-parity decay sequence of deformed rare earth nuclei.

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