Lifetime measurements of yrast states in $$^{\mathbf {178}}$$Pt using the charge plunger method with a recoil separator
Lifetime measurements of yrast states in $$^{\mathbf {178}}$$Pt using the charge plunger method with a recoil separator
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使用带有反冲分离器的充电柱塞方法对 $$^{mathbf {178}}$$Pt 中的 yrast 状态进行寿命测量
DOI：
10.1140/epja/s10050-021-00425-8
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Heery J
中科院分区：
文献类型：
--
作者：
Heery J
用激发态去激发直通射线跃迁和内电子转换测量了铂的寿命。离子电荷选择飞行中的质量分离器MARA和测量在焦平面上与keV射线跃迁检测使用JUROGAM 3光谱仪。用微分衰减曲线法（DDCM）分析了所得的电荷态分布，得到该态的寿命值为430（20）ps。这项工作建立在一种方法，结合了充电柱塞技术与DDCM分析。作为一种替代分析，离子的选择与焦平面上的Pt α衰变（MeV）一致。寿命信息是通过拟合两个状态的贝特曼方程的衰变曲线与由一个单一的四极矩定义的个人状态的寿命。这产生了一个寿命值为430（50）ps的状态，和54（6）ps的状态。当使用装药柱塞法时，在不可行的情况下，利用装药盘和后坐力之间的重合时，基于贝特曼方程的分析方法将变得特别重要。
Lifetime measurements inPt with excited states de-exciting through-ray transitions and internal electron conversions have been performed. Ionic charges were selected by the in-flight mass separator MARA and measured at the focal plane in coincidence with thekeV-ray transition detected using the JUROGAM 3 spectrometer. The resulting charge-state distributions were analysed using the differential decay curve method (DDCM) framework to obtain a lifetime value of 430(20) ps for thestate. This work builds on a method that combines the charge plunger technique with the DDCM analysis. As an alternative analysis, ions were selected in coincidence with thePt alpha decay (MeV) at the focal plane. Lifetime information was obtained by fitting a two-state Bateman equation to the decay curve with the lifetime of individual states defined by a single quadrupole moment. This yielded a lifetime value of 430(50) ps for thestate, and 54(6) ps for thestate. An analysis method based around the Bateman equation will become especially important when using the charge plunger method for the cases where utilising coincidences between promptrays and recoils is not feasible.