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首页> 外文期刊>Physical review, C >Lifetime measurements in Ti-52,Ti-54 to study shell evolution toward N=32
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Lifetime measurements in Ti-52,Ti-54 to study shell evolution toward N=32

机译：TI-52，TI-54的寿命测量，研究壳体进化朝向n = 32

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Lifetimes of the excited states in the neutron-rich Ti-52,Ti-54 nuclei, produced in a multinucleon-transfer reaction, were measured by employing the Cologne plunger device and the recoil-distance Doppler-shift method. The experiment was performed at the Grand Accelerateur National d'Ions Lourds facility by using the Advanced Gamma Tracking Array for the gamma-ray detection, coupled to the large-acceptance variable mode spectrometer for an event-by-event particle identification. A comparison between the transition probabilities obtained from the measured lifetimes of the 2(1)(+) to 8(1)(+) yrast states in Ti-52,Ti-54 and that from the shell-model calculations based on the well-established GXPF1A, GXPF1B, and KB3G fp shell interactions support the N = 32 subshell closure. The B(E2) values for Ti-52 determined in this work are in disagreement with the known data, but are consistent with the predictions of the shell-model calculations and reduce the previously observed pronounced staggering across the even-even titanium isotopes.
机译：通过采用科隆柱塞装置和反冲距离多普勒 - 换档方法测量在多核转移反应中产生的中子富核Ti-52，Ti-54核中的激发态的寿命。该实验在Grand Accelateur National D'离子卢索设施中进行了用于伽马射线检测的高级伽马跟踪阵列，耦合到大验收可变模式光谱仪，用于逐赛事粒子识别。从Ti-52，Ti-54中的2（1）（+）〜8（+）yrast状态的测量概率与基于井的壳模型计算的测量概率与从贝壳模型计算中获得的过渡概率之间的比较 - 建立的GXPF1A，GXPF1B和KB3G FP Shell交互支持N = 32个子壳闭合。在该工作中确定的Ti-52的B（E2）值与已知数据分歧，但是与壳模型计算的预测一致，并且减少先前观察到偶钛同位素的发出惊人的惊人。

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