Reduced transition probabilities have been extracted between excited, yrast states in the nucleus Pd. The transitions of interest were observed following decays of the , -keV isomeric state, which was populated following the projectile fragmentation of a Xe primary beam at the GSI Helmholtzzentrum für Schwerionenforschung accelerator facility as part of FAIR Phase-0. Experimental information regarding the reduced E2 transition strengths for the decays of the yrast and states was determined following isomer-delayed coincidence method, using the LaBr(Ce)-based FATIMA fast-timing coincidence gamma-ray array, which allowed direct determination of lifetimes of states in Pd using the Generalized Centroid Difference (GCD) method. The experimental value for the half-life of the yrast 8 state of 755(106) ps results in a reduced transition probability of B(E2:86) = 205 efm, which enables a precise verification of shell-model calculations for this unique system, lying directly between the line and the neutron shell closure. The determined value provides an insight into the purity of configurations in competition with admixtures from excitations between the (lower) and (higher) orbitals for the first time. The results indicate weak collectivity expected for near-zero quadrupole deformation and an increasing importance of the proton-neutron interaction at .

中文翻译：

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Tz = +1 核 94Pd 的形状以及质子-中子相互作用对其激发态结构的作用


已在 Pd 核中的激发态和 yrast 态之间提取了降低的跃迁概率。在 , -keV 异构态衰变后观察到了感兴趣的转变，该异构态是在作为 FAIR Phase-0 的一部分的 GSI Helmholtzzentrum für Schwerionenforschung 加速器设施中 Xe 主束射弹破碎后填充的。关于 yrast 和态衰变的 E2 跃迁强度降低的实验信息是通过异构体延迟符合方法确定的，使用基于 LaBr(Ce) 的 FATIMA 快速定时符合伽马射线阵列，该阵列允许直接确定使用广义质心差分 (GCD) 方法在 Pd 中表示状态。 yrast 8 态半衰期的实验值为 755(106) ps，导致转变概率降低为 B(E2:86) = 205 efm，这使得能够精确验证该独特系统的壳模型计算，直接位于线路和中子壳层闭合之间。确定的值首次提供了对与（较低）和（较高）轨道之间激发的混合物竞争的构型纯度的洞察。结果表明，预计接近零四极变形的集体性较弱，并且 处的质子-中子相互作用的重要性日益增加。