Coexistence or strong-mixing of intruder 0+ states in even-even Zr nuclei.
Coexistence or strong-mixing of intruder 0+ states in even-even Zr nuclei.
复制标题
偶偶 Zr 核中入侵者 0 态的共存或强混合。
DOI：
10.1103/physrevc.38.984
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
Federman
中科院分区：
文献类型：
--
作者：
Heyde;Kirchuk;Federman
In even-even Zr nuclei, with the neutron number increasing from N=56 on, a steady lowering of the first excited ${0}^{+}$ state is observed. This excited ${0}^{+}$ state has been mainly related to the proton excitation across the Z=40 subshell. Starting from the shell-model matrix element, connecting the (2${p}_{1/2}$${)}^{2}$${0}^{+}$ and (1${g}_{9/2}$${)}^{2}$${0}^{+}$ configurations in $^{90}\mathrm{Zr}$, we point out that a large reduction in the coupling matrix element is needed to explain the very low ${0}^{+}$ excitation energy at N=58, N=60. This reduction is calculated, starting from the matrix element connecting the spherical valence neutron configuration and a Nilsson model deformed wave function describing the neutron component.
In even-even Zr nuclei, with the neutron number increasing from N=56 on, a steady lowering of the first excited ${0}^{+}$ state is observed. This excited ${0}^{+}$ state has been mainly related to the proton excitation across the Z=40 subshell. Starting from the shell-model matrix element, connecting the (2${p}_{1/2}$${)}^{2}$${0}^{+}$ and (1${g}_{9/2}$${)}^{2}$${0}^{+}$ configurations in $^{90}\mathrm{Zr}$, we point out that a large reduction in the coupling matrix element is needed to explain the very low ${0}^{+}$ excitation energy at N=58, N=60. This reduction is calculated, starting from the matrix element connecting the spherical valence neutron configuration and a Nilsson model deformed wave function describing the neutron component.