Masses of neutron-rich, odd-odd Pm, Eu and Tb nuclei near $N=98$ were measured using the Canadian Penning Trap mass spectrometer at the Californium Rare Isotope Breeder Upgrade (CARIBU) facility. High-resolution mass measurements yielded the discovery of spin-trap isomers at $N=97$ in ${}^{162}$Tb, and in the $N=99$ isotones of ${}^{160}$Pm and ${}^{164}$Tb. Furthermore, no evidence of long-lived isomers were observed at $N=95$ in ${}^{158}$Eu, at $N=97$ in ${}^{158}$Pm, nor at $N=101$ in ${}^{164}$Eu and ${}^{166}$Tb. These experimental observations are compared with results from multi-quasiparticle blocking calculations.

中文翻译：

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N = 98附近的轻稀土区中变形奇数核中的自旋陷阱异构体

富中子，奇数Pm，Eu和Tb原子核的质量 $ñ=98$在Californium Rare Isotope Breeder Upgrade（CARIBU）设施中使用加拿大潘宁阱质谱仪进行了测量。高分辨率质量测量产生了自旋陷阱异构体的发现$ñ=97$ 在 ${}^{162}$Tb，并在 $ñ=99$ 的同调 ${}^{160}$Pm和 ${}^{164}$待定 此外，没有观察到长寿命异构体的证据。$ñ=95$ 在 ${}^{158}$欧盟，在 $ñ=97$ 在 ${}^{158}$下午，也不在 $ñ=101$ 在 ${}^{164}$欧盟和 ${}^{166}$待定 将这些实验观察结果与多准粒子阻塞计算的结果进行比较。