Level lifetimes of the yrast (5/2 −) to 13/2 − states in the neutron-rich nucleus 53 Ti, produced in a multinucleon-transfer reaction, have been measured for the first time. The recoil distance Doppler-shift method was employed and lifetimes of the excited states were extracted by a lineshape analysis aided by Geant4-based Monte-Carlo simulations. The experiment was performed at the Grand Accelerateur National d'Ions Lourds facility in Caen, France, by using the Advanced Gamma Tracking Array for the γ-ray detection coupled to the large-acceptance variable mode spectrometer for an event-by-event particle identification and the Cologne plunger for deep-inelastic reactions. Reduced transition probabilities, deduced from the lifetimes, give new information on the nuclear structure of 53 Ti, and are used to benchmark different shell-model calculations using established interactions in the fp shell.

中文翻译：

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富中子 Ti53 中激发态的寿命测量：对有效壳模型相互作用进行基准测试

首次测量了在多核子转移反应中产生的富中子核 53 Ti 中 yrast (5/2 -) 到 13/2 - 状态的能级寿命。采用反冲距离多普勒频移方法，并通过基于 Geant4 的蒙特卡罗模拟辅助的线形分析提取激发态的寿命。该实验是在法国卡昂的 Grand Accelerateur National d'Ions Lourds 设施进行的，使用先进的伽马跟踪阵列进行 γ 射线探测，并与大接受度可变模式光谱仪相结合进行逐事件粒子识别和用于深度非弹性反应的科隆柱塞。从寿命中推导出的降低的跃迁概率提供了关于 53 Ti 的核结构的新信息，