短寿命缺中子同位素~(130,129,128)Ce的(EC+β~+)衰变

首次报道130Ce、129Ce和128Ce的(EC+β+)衰变纲图,其中包括核素的产生、核素的分离鉴别以及纲图的建立。着重补充了一些重要的技术细节,更新了129Ce的衰变纲图,并对这些纲图中涉及的物理问题进行了讨论。

缺中子~(130)Pm和~(128)Pr核的EC/β~+衰变研究

171MeV 36Ar束轰击96Ru靶由熔合蒸发反应生成了130 Pm和12 8Pr核 .由氦喷嘴快速带传输系统将反应产物送到低本底区 .基于X γ t,γ γ t符合测量 ,首次建立了130 Pm的 (EC + β+)衰变纲图 .重新研究了12 8Pr核的衰变 ,订正和补充了γ射线 ,建立了新的 (EC + β+)衰变纲图

A New High-Spin Level Scheme of I-128

High-spin states in the odd-odd nucleus I-128 are investigated via the Sn-124(Li-7,3n)I-128 reaction at 28 and 32 MeV beam energies. A new level scheme of I-128 is established up to high-spin states at I-pi = 16, including 48 levels and 72 gamma transitions. The present level scheme is largely different from the one in a recent publication due to identification of several doublet and triplet gamma transitions and their proper placements in the level scheme. The high-spin level structure exhibits no obvious collective properties and is possibly associated with two and multi-quasiparticle configurations.