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Anomalous behavior of the first excited 0$^{+}$ state in $N \approx Z$ nuclei

K. Kaneko·R. F. Casten·M. Hasegawa·T. Mizusaki·Jing-ye Zhang·E. A. McCutchan·N. V. Zamfir·R. Krücken
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Abstract

A study of the energies of the first excited $0^+$ states in all even-even $Z$ $\geq$ 8 nuclei reveals an anomalous behavior in some nuclei with $N$ = $Z$, $Z$ $\pm$ 2. We analyze these irregularities in the framework of the shell model. It is shown that proton-neutron correlations play an important role in this phenomenon.

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K. Kaneko, R. F. Casten, M. Hasegawa, T. Mizusaki, Jing-ye Zhang, E. A. McCutchan, N. V. Zamfir, R. Krücken. 2005-01-20. Anomalous behavior of the first excited 0$^{+}$ state in $N \approx Z$ nuclei. https://doi.org/10.1103/physrevc.71.014319

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