Skyrme张量相互作用对可能的等待点原子核β衰变半衰期的影响
Effects of Skyrme Tensor Interactions on the β Decay Half-lives in Possible Waiting Point Nuclei
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摘要: 使用基于Skyrme相互作用的HFB+QRPA模型研究Ⅳ~82和126的同中子异位素链的β-衰变的半衰期.在计算中所使用的张量相互作用和同位旋标量(IS)对相互作用都是很好地被约束了的.比较了张量相互作用和IS对相互作用对半衰期的影响.IS对相互作用的强度与相应的同位旋矢量(Ⅳ)对相互作用的强度相当时,对Ⅳ~82和126的同中子异位素链中有大的中子过剩的原子核的半衰期影响很微弱.而张量相互作用采用最近约束的强度时对半衰期的影响非常显著.
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关键词:
- β衰变半衰期 /
- 张量相互作用 /
- 同位旋标量对相互作用
Abstract: The β-decay half-lives of N ~ 80 and 126 isotonic chains are calculated with HFB+QRPA models based on Skyrme force.In the calculations,the well constrained Skyrme tensor interaction and isoscalar spin-triplet (IS) pairing interaction are included so that to study their effects on the half-lives.The effects of tensor interaction and IS pairing interaction on the half-lives are compared.The IS pairing interaction with strength similar to that of isovector (Ⅳ) one produces only a trivial effect in N ~82 nuclei,and N ~126 nuclei with big neutron excess.While the tensor interaction with presently constrained strengths produces an obvious effect. -
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