用外推解析延拓法计算超临界狄拉克共振参数
Supercritical Dirac resonance parameters from extrapolated analytic continuation methods
摘要：
研究了核间距R = 20 fm时U（92+）-Cf（98+）体系超临界准分子基态的复标度（CS）、光滑外标度（SES）和复吸收势（CAP）解析延拓方法.帕德近似的复杂的能量轨迹被用来执行外推的共振能量，从而成为独立的各自的稳定参数。在双中心势的近似下，证明了SES和CAP的外推结果在很高的精度上是一致的。外推CAP计算扩展到包括偶极和四极项的潜力，为一个大范围的核间分离R。这些条款导致加宽的宽度在permille水平时，核几乎是在接触，并在%水平的R值的基态进入负连续谱。
英文摘要：
The analytic continuation methods of complex scaling (CS), smooth exterior scaling (SES), and complex absorbing potential (CAP) are investigated for the supercritical quasimolecular ground state in the U(92+)-Cf(98+) system at an internuclear separation of R=20 fm. Pade approximants to the complex-energy trajectories are used to perform an extrapolation of the resonance energies, which, thus, become independent of the respective stabilization parameter. Within the monopole approximation to the two-center potential is demonstrated that the extrapolated results from SES and CAP are consistent to a high degree of accuracy. Extrapolated CAP calculations are extended to include dipole and quadrupole terms of the potential for a large range of internuclear separations R. These terms cause a broadening of the widths at the permille level when the nuclei are almost in contact, and at the % level for R values where the ground state enters the negative continuum.
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