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Fission barriers and other characteristics of nuclei from the uranium region

机译：铀区核障碍和核的其他特征

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Fission barriers in nuclei belonging to the uranium region and their other characteristics are calculated on the basis of the FaNDF(0) energy density functional. In particular, the neutron-separation energies S (n) and S (2n), the proton-separation energies S (p), and the beta-transition energiesQ (beta) are calculated for uranium, neptunium, and plutonium isotopes. In addition, the deformation energies and parameters of these nuclei are presented along with their radii. A comparison with the predictions of the Skyrme-Hartree-Fock method implemented with several versions of the Skyrme energy density functionals is performed. The role of the octupole deformation beta (3) is studied for the U-238 nucleus. It is shown that this deformation does not have any significant effect on the first-barrier height B ((1)) (f) or ground-state properties. At the same time, the second-barrier height B(2) f decreases by a factor of about two upon taking into account beta (3). A phase transition at A similar to 260 is found for the three isotopic chains being considered: this point is a bifurcation point at which B ((1)) (f) (A) forks into two curves. Of these, the curve B ((2)) (f) (A) splits from it, prolonging the former curve for B ((1)) (f) (A) almost continuously, whereas the curve for B ((1)) (f) (A) itself goes down sharply.
机译：基于FANDF（0）能量密度函数计算属于铀区的核的裂变屏障及其其他特征。特别地，为铀，Neptunium和钚同位素计算中子分离能量S（n）和s（2n），质子分离能量s（p）和β-转变能量q（beta）。此外，与其半径一起呈现这些核的变形能量和参数。执行与使用若干版本的Skyrme能量密度函数实现的Skyrme-Hartree-Fock方法的预测进行比较。研究了Octupole变形β（3）的作用，用于U-238核。结果表明，该变形对第一阻挡高度B（（1））（F）或地状态性质没有任何显着影响。同时，考虑到β（3）时，第二阻挡高度B（2）F减小约两个约两个。对于所考虑的三个同位素链，发现类似于260的相转变：该点是分叉点，其B（1））（F）（F）（a）叉分成两条曲线。其中，曲线B（（2））（f）（f）（a）分裂，延长了B（1））（f）（f）（f）（f）（f）（f）（f）（f）（f）（f）（f）（f）），而B的曲线（（1） ）（f）（a）本身急剧下降。

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