The fission pathway of even–even actinide nuclei have been systematically calculated using the deformation-constrained nuclear density functional theory beyond the second fission barriers within the UNEDF1 energy-density functionals (EDFs). Our calculated results show that, allowing for triaxial deformation, the second fission barriers are lowered by a few hundreds of keV to 2 MeV. For the heaviest actinides, it is found that inclusion of triaxial deformation reduces the outer barrier significantly.

中文翻译：

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用核密度泛函理论研究act系元素核的裂变势垒：三轴变形的影响

利用变形约束的核密度泛函理论，系统地计算了偶数-act系原子的裂变途径，超越了UNEDF1能量密度泛函（EDFs）中的第二个裂变障碍。我们的计算结果表明，考虑到三轴变形，第二裂变势垒降低了数百keV至2 MeV。对于最重的act系元素，发现包含三轴变形会显着降低外部势垒。