The $E2/M1$ multipole mixing ratio of the $1_{\text{sc}}^{+}\to 2_1^{+}\gamma$-ray transition and therefore the $F$-vector $E2$ decay of the scissors mode of the shape-phase transitional nucleus ${}^{152}\mathrm{Sm}$ have been measured with the nuclear resonance fluorescence method at the High-Intensity $\gamma$-ray Source ($\mathrm{HI}\gamma \mathrm{S}$). Furthermore, parity quantum numbers of several dipole-excited states have been remeasured, making use of the polarized $\gamma$-ray beam at $\mathrm{HI}\gamma \mathrm{S}$, and partially reassigned. The new data enable an unambiguous determination of the proton and neutron effective boson quadrupole charges within the proton-neutron interacting boson model. With the well-constrained parameter set, a new mixed-symmetry state is predicted.

中文翻译：

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Sm152的M1剪刀模式的E2衰减特性

这 $E\mathrm{2个}/\mathrm{中号}\mathrm{1个}$ 的多极混合比 ${\mathrm{1个}}_{\text{SC}}^{+}\to {\mathrm{2个}}_{\mathrm{1个}}^{+}\gamma$射线过渡，因此 $F$-向量 $E\mathrm{2个}$ 形状相过渡核的剪刀模的衰减 ${}^{152}m$ 已经通过核共振荧光法在高强度下进行了测量 $\gamma$射线源（$\mathrm{你好}\gamma \mathrm{小号}$）。此外，利用极化态，已经重新测量了几个偶极激发态的奇偶量子数$\gamma$射线束 $\mathrm{你好}\gamma \mathrm{小号}$，并部分重新分配。新数据可以在质子-中子相互作用玻色子模型中确定质子和中子的有效玻色子四极电荷。使用约束良好的参数集，可以预测新的混合对称状态。