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超重核294118和291116及其α衰变链上各核素半衰期的研究

Half lives of Superheavy Nuclei in 294118 and 291116 α decay Chain within Generalized Liquid Drop Model

    摘要
  • 摘要: 运用推广的液滴模型（GLDM）确定了超重核294118和291116及其α衰变链上各核素的衰变势垒， 采用量子力学中的WKB方法计算α衰变中的势垒穿透几率， 对该链上各原子核的α衰变半衰期进行了研究。 此外， 还利用Royer公式对该链上各原子核的α衰变半衰期进行了计算。 结果表明， GLDM 考虑亲和能与Royer公式给出的α衰变半衰期与超重核区的实验值符合很好， 验证了GLDM和Royer公式在超重核区的适用性，可以用来预测超重核的半衰期。 最后， 预言了Z=118 和116 同位素链上各核素的半衰期， 结果表明， 在Z=118和116中存在α衰变长寿命同位素， 这需要实验上的检验。The αdecay potential barrier of the newly synthesized superheavy nuclei starting from 294118 and 291116 have been determined and their halflives have been studied with the Generalized Liquid Drop Model(GLDM) connected with WKB approximation and Royer’s formulae．The αdecay halflives of the nuclei belonging to the superheavy nuclei starting from 294118 and 291116 have been calculated．The calculated results are in agreement with the experimental data， which show that the α decay halflives of superheavy nuclei with the GLDM and Royer’s formulae can be applied in the studying on superheavy nuclei successfully．Finally， the halflives of Z=118 and 116 isotopes have been predicted， and the results suggest there may be some longlived superheavy nuclei for αdecay in those isotopes.

     

    Abstract: The αdecay potential barrier of the newly synthesized superheavy nuclei starting from 294118 and 291116 have been determined and their halflives have been studied with the Generalized Liquid Drop Model(GLDM) connected with WKB approximation and Royer’s formulae．The αdecay halflives of the nuclei belonging to the superheavy nuclei starting from 294118 and 291116 have been calculated．The calculated results are in agreement with the experimental data， which show that the α decay halflives of superheavy nuclei with the GLDM and Royer’s formulae can be applied in the studying on superheavy nuclei successfully．Finally， the halflives of Z=118 and 116 isotopes have been predicted， and the results suggest there may be some longlived superheavy nuclei for αdecay in those isotopes.

     

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