AI 中文总结
通过快定时γ-γ符合谱学测量$^{93-99}$Y的激发态寿命，结合理论计算，为丰中子奇A核的形状共存研究提供了新约束。
AI 中文摘要
利用LOHENGRIN反冲分离器上的快闪烁探测器，通过快定时γ-γ符合谱学方法，测量了丰中子奇A核$^{93-99}$Y中16个激发态的寿命。研究重点关注N≈59附近区域，该区域会发生核形变与形状共存的快速变化。采用广义重心差法确定寿命，并将其与考虑组态混合的相互作用玻色子-费米子模型计算结果对比，该模型将奇A钇同位素描述为质子与包含正常组态及侵入组态的玻色核心耦合而成。研究结果为A≈100附近丰中子核（尤其是实验信息仍有限的奇A系统）的形状共存与结构演化理论描述提供了新约束。
英文摘要
Lifetimes of 16 excited states in the neutron-rich odd-$A$ nuclei $^{93-99}$Y were measured using fast-timing $γ$-$γ$ coincidence spectroscopy with fast scintillation detectors at the LOHENGRIN recoil separator. Particular attention is given to the region around $N \approx 59$, where rapid changes in nuclear deformation and shape coexistence occur. The lifetimes, determined using the generalized centroid difference method, are compared with interacting boson-fermion model calculations with configuration mixing, in which the odd-$A$ yttrium isotopes are described as a proton coupled to a bosonic core containing normal and intruder configurations. The results provide new constraints on theoretical descriptions of shape coexistence and structural evolution in neutron-rich nuclei near $A \approx 100$, particularly for odd-$A$ systems where experimental information remains limited.
Comments15 pages, 3 figures
