~（68）Ni和~（90）Zr中的对激发与入侵态
Pairing-excitation versus intruder states in 68Ni and 90Zr
摘要：
本文讨论了68 Ni（Z=28，N=40）中0+态的性质，并与90 Zr（Z=40，N=50）进行了比较。在~（68）Ni中只有~2.2 MeV激发能的0+质子入侵态，而在~（90）Zr中类似的中子入侵态分别为4126 keV和5441 keV。应用壳模型描述的0+入侵者状态表明，许多对散射中子跨越N=40必须参与解释低激发能的质子入侵者配置在68 Ni。
英文摘要：
A discussion on the nature of the 0+ states in 68Ni (Z=28, N=40) is presented and a comparison is made with its valence counterpart 90Zr (Z=40, N=50). Evidence is given for a 0+ proton intruder state at only ~2.2 MeV excitation energy in 68Ni, while the analogous neutron intruder states in 90Zr reside at 4126 keV and 5441 keV. The application of a shell-model description of 0+ intruder states reveals that many pair-scattered neutrons across N=40 have to be involved to explain the low excitation energy of the proton-intruder configuration in 68Ni.
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