Fast-timing measurements in neutron-rich odd-mass zirconium isotopes using LaBr 3 :Ce detectors coupled with Gammasphere
Fast-timing measurements in neutron-rich odd-mass zirconium isotopes using LaBr 3 :Ce detectors coupled with Gammasphere
复制标题
使用 LaBr 3 :Ce 探测器与伽马球结合快速测量富中子奇质量锆同位素
DOI：
10.1051/epjconf/201819305004
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发表时间：
2018
影响因子：
--
通讯作者：
Gamba E
中科院分区：
文献类型：
--
作者：
Gamba E
阿贡国家实验室进行了一项快速计时实验，测量质量数 A≃110 和 A≃150 周围变形区域的原子核最低态的寿命。这些区域是通过 252 Cf 的自发裂变填充的，并且使用 51 个伽马球探测器与 25 个 LaBr3:Ce 探测器结合测量裂变碎片中激发态衰变后的伽马辐射。简要介绍了采集系统以及裂变碎片 100Zr 快速定时分析的一些初步结果。发现 100Zr 中 2+ 态的寿命值 τ= 840(65) ps 与采用值 791+26-35ps 的一个标准偏差内一致。这与四极变形参数 0.36(2) 相关，该参数在文献值 0.3556+82-57 的一个标准差范围内。
A fast-timing experiment was performed at the Argonne National Laboratory to measure the lifetimes of the lowest lying states of nuclei belonging to the deformed regions around mass number A≃110 and A≃150. These regions were populated via spontaneous fission of252Cf and the gamma radiation following the decay of excited states in the fission fragments was measured using 51 Gammasphere detectors coupled with 25 LaBr3:Ce detectors. A brief description of the acquisition system and some preliminary results from the fast-timing analysis of the fission fragment 100Zr are presented. The lifetime value ofτ= 840(65) ps was found for the 2+state in100Zr consistent within one standard deviation of the adopted value with 791+26-35ps. This is associated with a quadrupole deformation parameter of 0.36(2) which is within one standard deviation of the literature value of 0.3556+82-57.