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Isomer building blocks and K-forbidden decays

机译:异构体构建块和k-forbidden decays

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摘要

High-K isomers are long-lived excitations of deformed atomic nuclei. Their structure is built from broken nucleon pairs that generate high angular momentum, K, along the nuclear symmetry axis. The partial conservation of this quantity leads to strong inhibition of electromagnetic decay, and hence to isomerism. The present work examines the hindrance factors for a range of multipole orders, with a focus on highly K-forbidden E1 transitions from multi-quasiparticle isomers in the A approximate to 170 region of nuclei. Allowing for a general 104 inhibition of E1 transitions, there is good accord with other multipole orders. A key feature is that the inhibition declines for isomers that are more highly excited, relative to a rigid rotor of the same total angular momentum. Comparison is also made with K-forbidden E1 transitions in the quasicontinuum, and similar inhibition properties are found.
机译:高k异构体是变形原子核的长期激动。 它们的结构由破碎的核子对构成,沿着核对称轴产生高角动量k k。 该数量的部分保护导致电磁衰减的强烈抑制,因此对异构性。 目前的工作探讨了一系列多极订单的阻碍因素,重点关注来自多Quasiparticle异构体的高度K-Forbiddens异构体的转变,近似为170个核。 允许一般104抑制E1过渡,与其他多池订单良好。 关键特征是,相对于相同总角动力的刚性转子更强,对异构体的抑制下降。 比较也用k-forbidden e1过渡进行了QuasIconuum中的,并且发现了类似的抑制特性。

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