New transitions in neutron-rich ${}^{100}\mathrm{Y}$ have been identified in a ${}^9\mathrm{Be}+{}^{238}\mathrm{U}$ experiment with mass and $Z$ gates to provide full fragment identification. These transitions and high spin levels of ${}^{100}\mathrm{Y}$ have been investigated by analyzing the high statistics $\gamma \text{−}\gamma \text{−}\gamma$ and $\gamma \text{−}\gamma \text{−}\gamma \text{−}\gamma$ coincidence data from the spontaneous fission of ${}^{252}\mathrm{Cf}$ at the Gammasphere detector array. Two new bands, 14 new levels, and 23 new transitions have been identified. The $K^{\pi }=4^{+}$ new band decaying to a $1s$ isomeric state is assigned to be the high-$K$ Gallagher-Moszkowski (GM) partner of the known $K^{\pi }=1^{+}$ band, with the $\pi 5/2\left[522\right]\otimes \nu 3/2\left[411\right]$ configuration. This $4^{+}$ band is also proposed to be the pseudospin partner of the new $K^{\pi }=5^{+}$ band with a $5^{+}\pi 5/2\left[422\right]\otimes \nu 5/2\left[413\right]$ configuration, to form a $\pi 5/2\left[422\right]\otimes \nu [3125/2,3/2]$ neutron pseudospin doublet. Constrained triaxial covariant density-functional theory and quantal particle rotor model calculations have been applied to interpret the band structure and available electromagnetic transition probabilities and are found to be in good agreement with experimental values.

中文翻译：

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Y100中的伪旋转双峰带和Gallagher Moszkowski双峰带

中子富集的新转变 ${}^{100}\mathrm{ÿ}$ 已经在 ${}^9是+{}^{238}\mathrm{ü}$ 试验质量和 $ž$门提供完整的片段识别。这些过渡和高自旋水平${}^{100}\mathrm{ÿ}$ 通过分析高统计数据进行了调查 $\gamma \text{-}\gamma \text{-}\gamma$ 和 $\gamma \text{-}\gamma \text{-}\gamma \text{-}\gamma$ 来自自然裂变的巧合数据 ${}^{252}f$在伽玛球探测器阵列上。确定了两个新乐队，14个新级别和23个新过渡。这${ķ}^{\pi }=4^{+}$ 新带衰减到 $\mathrm{1个}s$ 异构状态被指定为高$ķ$ Gallagher-Moszkowski（GM）的合伙人 ${ķ}^{\pi }={\mathrm{1个}}^{+}$ 乐队，与 $\pi 5/\mathrm{2个}\left[522\right]\otimes \nu 3/\mathrm{2个}\left[411\right]$配置。这$4^{+}$ 乐队也被提议是新乐队的伪自旋伙伴。 ${ķ}^{\pi }=5^{+}$ 带一个 $5^{+}\pi 5/\mathrm{2个}\left[422\right]\otimes \nu 5/\mathrm{2个}\left[413\right]$ 配置，形成一个 $\pi 5/\mathrm{2个}\left[422\right]\otimes \nu [3125/\mathrm{2个}，3/\mathrm{2个}]$中子伪自旋双峰。约束三轴协变密度泛函理论和量子粒子转子模型计算已被用于解释能带结构和可用的电磁跃迁概率，并与实验值很好地吻合。