自共轭$^{108}$衰变链和$^{104}$ Te $α$衰变链的微观描述
Microscopic description of the self-conjugate $^{108}$Xe and $^{104}$Te $α$-decay chain
摘要：
最近观察到的$^{108}$-$\to$ $^{104}$ Te $\to$ $^{100}$ Sn $α$ -衰变链的半衰期的微观计算是使用一个自洽的框架的基础上的能量密度泛函。利用相对论密度泛函DD-PC 1和有限程可分离对相互作用计算了$^{104}$ Te和$^{108}$ Te的轴对称形变能面随四极、八极和六极集体坐标的变化.动态最小作用路径的确定，跟踪$α$粒子发射从平衡变形的切断点。计算的半衰期：197纳秒的$^{104}$ Te和50 $μ$ s的$^{108}$碲，比较最近的实验值的超允许的$α$ -$^{104}$ Te的衰减：$< 18$ ns，和$^{108}$碲：58 $^{+106}_{-23}$ $μ$ s的半衰期。
英文摘要：
A microscopic calculation of half-lives for the recently observed $^{108}$Xe $\to$ $^{104}$Te $\to$ $^{100}$Sn $α$-decay chain is performed using a self-consistent framework based on energy density functionals. The relativistic density functional DD-PC1 and a separable pairing interaction of finite range are used to compute axially-symmetric deformation energy surfaces of $^{104}$Te and $^{108}$Xe as functions of quadrupole, octupole and hexadecupole collective coordinates. Dynamic least-action paths are determined that trace the $α$-particle emission from the equilibrium deformation to the point of scission. The calculated half-lives: 197 ns for $^{104}$Te and 50 $μ$s for $^{108}$Xe, are compared to recent experimental values of the half-lives of superallowed $α$-decay of $^{104}$Te: $< 18$ ns, and $^{108}$Xe: 58$^{+106}_{-23}$ $μ$s.
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