Pairing-excitation versus intruder states in 68Ni and 90Zr

Pairing-excitation versus intruder states in 68Ni and 90Zr
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68Ni 和 90Zr 中的配对激发态与入侵态

DOI:
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发表时间:
2010
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通讯作者:
P. Duppen
P. Duppen
中科院分区:
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文献类型:
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作者:
D. Pauwels;J. Wood;K. Heyde;M. Huyse;R. Julin;P. Duppen

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讨论了 Ni-68 (Z = 28, N = 40) 中 0(+) 态的性质,并与其对应价态 Zr-90 (Z = 40, N = 50) 进行了比较。证据表明,Ni-68 中的 0(+) 质子入侵态的激发能仅与 2.2 MeV 相似,而 Zr-90 中类似的中子入侵态则位于 4126 和 5441 keV。 0(+) 入侵者态的壳模型描述的应用表明,必须涉及 N = 40 上的许多成对散射中子才能解释 Ni-68 中质子-入侵者构型的低激发能。
A discussion on the nature of the 0(+) states in Ni-68 (Z = 28, N = 40) is presented and a comparison is made with its valence counterpart Zr-90 (Z = 40, N = 50). Evidence is given for a 0(+) proton-intruder state at only similar to 2.2-MeV excitation energy in Ni-68, while the analogous neutron-intruder states in Zr-90 reside at 4126 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 Ni-68.