Anomalous behavior of the first excited 0+ state in N ≈ Z nuclei
K. Kaneko, R. F. Casten, M. Hasegawa, T. Mizusaki, Jing-ye Zhang, E. A. McCutchan, N. V. Zamfir, R. Krücken
Abstract
A study of the energies of the first excited 0+ states in all even-even Z ≥ 8 nuclei reveals an anomalous behavior in some nuclei with N = Z, Z 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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