Abstract
A compilation of the known data on Coulomb energy differences of isobaric doublets and isobaric triplets is given. Plots of the Coulomb energy differences versus¯Z/A 1/3 with¯Z=(Z 1+Z 2)/2 show an analogous shell structure behaviour for the three series with 2¯Z=A−1,A andA+1 (T=1, 1/2 and 1), i.e. discontinuities at the closed shells atA=4, 16 and 40 and the closed subshell atA=32 and oscillations mainly being due to Coulomb proton-proton pairing energy. A positive energy shift of the lowest states withT=1 of all self-conjugate nuclei withA=4n+2 seems to be indicated by the experimental data. A semi-empirical formula is given that describes the data.
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Jänecke, J. Die Coulomb-Energien leichter Atomkerne. Z. Physik 160, 171–185 (1960). https://doi.org/10.1007/BF01336979
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DOI: https://doi.org/10.1007/BF01336979