核形变在近垒和垒下能区阈反常和熔合反应中的效应

Effects of Nuclear Deformation in Threshold Anomaly and Fusion Reaction at Near-and Sub-barrier Energies

  • 摘要: 基于经典的一维势垒穿透模型, 考虑核静态形变和动力学形变效应, 建立了联系周边反应和熔合反应的模型———形变 +能量相依的多维势垒穿透模型。该模型成功解释了19F +2 0 8Pb体系的一些实验现象, 并指出动力学极化效应仅在库仑位垒附近起作用, 而静态形变效应则在垒下能区起主要作用。这一结论说明 :在用冷熔合形成超重核时, 使用形变的弹靶体系将有利于增强合成的截面

     

    Abstract: Based on the one dimensional barrier penetration model, a new model is built to connect the peripheral reaction with the fusion reaction and take account of the effects of nuclear static deformation and dynamic polarization, namely deformation and energy dependent multi dimensional barrier penetration model. It succeeds in the explanation of some experimental phenomena in 19 F+ 208 Pb system. Moreover, it indicates that the dynamic polarization takes effect only at energy around the barrier, while the static deformation takes effect at energy further below the barrier. This conclusion suggests that the deformed configuration system should be of great benefit to the synthesis of heavy or super heavy nucleus in the cold fusion process.

     

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