We revisit the proton emitter 149Lu utilizing the recently developed triaxial relativistic Hartree-Bogoliubov theory in continuum (TRHBc). By incorporating the microscopic nuclear structure properties from the TRHBc theory into the WKB approximation, we successfully reproduce the measured proton-emission half-life of 149Lu within experimental uncertainties. A triaxial ground state characterized by (β=0.17,γ=31∘) has been clarified for 149Lu. The inclusion of triaxiality significantly changes nuclear density distributions and potentials, which results in enhanced binding of both the nuclear system and the proton-emitting orbital. As a result, a slightly extended half-life for the proton emission of 149Lu is achieved after considering triaxial deformation degrees of freedom. The examination of the dependence of the decay width on triaxial deformation parameters highlights the significance of microscopic description of nuclear deformation beyond the proton dripline.

中文翻译：

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单质子发射器 149Lu 的三轴形状


我们利用最近开发的连续介质三轴相对论 Hartree-Bogoliubov 理论 (TRHBc) 重新审视质子发射器 149Lu。通过将 TRHBc 理论中的微观核结构特性融入 WKB 近似中，我们成功地在实验不确定性内重现了 149Lu 的测量质子发射半衰期。 149Lu 的三轴基态特征为 (β=0.17,γ=31∘)。三轴性的加入显着改变了核密度分布和电势，从而增强了核系统和质子发射轨道的结合。因此，在考虑三轴变形自由度后，149Lu的质子发射半衰期略有延长。对衰变宽度对三轴变形参数的依赖性的检查突出了对质子滴线之外的核变形进行微观描述的重要性。