New calculations of five-dimensional fission barriers for actinide nuclei

Microscopic description of α-decay as super-asymmetric fission

“…[49,50]. as postulated by theories [40][41][42][43]. Therefore, it can be predicted that β-vibrational states [44,45] are produced in the second potential well, explaining some anormal transition states observed experimentally [46,47] The microscopic equations of motion ( 2) and (3) are resolved along the superasymmetric fission path for the ↵-decay of the two parent nuclei as detailed in Refs.…”

Study of neutron induced fission of actinides in a macroscopic-microscopic model

“…微观理论研究的一个重要工作 是发展了多维约束协变密度泛函理论(MDC-CDFTs), 进而研究了锕系和超锕系核的势能曲面和裂变位 垒 [28,29] , 另外有超重复合核的裂变位垒、裂变速率与 温度相关裂变位垒的关系等方面的工作 [30,31] . 在宏观-微观理论研究方面中, 通过非稳定核的表面扩散效应 修正提高了基态质量公式的计算精度 [32] , 在中子诱发 锕系核裂变的多模式理论和裂变道概率系统学研 究 [ 1 0 , 11 ] 、五维势能曲面理论计算及其搜索算法研 究 [33][34][35] 、郎之万方程计算裂变碎片质量分布 [36]…”

“…图 1 连接二次曲面(a)和广义劳伦斯形状 [35] (b)的示意图. 各个参量的含义在图中已标明 Möller等人 [15] 的算法首先选择两个极小值点, 一 个作为"入水点", 另一个作为"出水点".…”

“…Three quadrature surfaces (a) and generalized Lawrence shape[35] (b). The shape parameters are depicted on the plot.…”

Macroscopic–microscopic calculations of fission potential surface of uranium isotopes in the three quadratic surfaces parametrization

“…And then a fission barrier search technique [19], a watershed algorithm [20], was developed on a 5D PES to obtain the fission barriers for U and Pu isotopes. Next, in order to get a more accurate PES in large deformation, we use two-center oscillator basis to calculate the microscopic energy [20,21]. In the same work, we also developed a new multimodal fission paths search algorithm, which can automatically find at least two different fission paths on a 5D PES.…”