论文标题
从$^8 $ li及其邻居及其邻居的概述从标准化到测量的四杆矩时，$ e2 $优势的始于估计
Ab initio estimation of $E2$ strengths in $^8$Li and its neighbors by normalization to the measured quadrupole moment
论文作者
论文摘要
对于电动四极杆（$ e2 $）的可观测值，这取决于核波函数的大距离尾巴，从头开始，无核配置相互作用（NCCI）计算汇聚缓慢收敛，从而使有意义的预测挑战了。但是，发现不同$ E2 $矩阵元素的计算值，尤其是涉及与紧密相关结构的水平的值（例如，在同一旋转频段内）是牢固成比例的。该观察结果表明，可观察到的一个已知值可用于确定$ e2 $优势的总体规模，从而为他人提供预测。特别是，我们证明了$ E2 $转换的有意义的预测是通过校准到基地四极力矩来获得的。我们在$^7 $ li和$^9 $的情况下测试了这种方法，以测试良好的低洼$ e2 $过渡，然后为$^8 $ li和$^9 $ li的过渡提供预测。特别是，我们以$^8 $ li中的$ 2^+\ rightArrow1^+$过渡来解决，其中所报告的测量强度超过了Green的功能蒙特卡洛（GFMC）预测，该预测的数量级超过了。
For electric quadrupole ($E2$) observables, which depend on the large-distance tails of the nuclear wave function, ab initio no-core configuration interaction (NCCI) calculations converge slowly, making meaningful predictions challenging to obtain. Nonetheless, the calculated values for different $E2$ matrix elements, particularly those involving levels with closely-related structure (e.g., within the same rotational band) are found to be robustly proportional. This observation suggests that a known value for one observable may be used to determine the overall scale of $E2$ strengths, and thereby provide predictions for others. In particular, we demonstrate that meaningful predictions for $E2$ transitions may be obtained by calibration to the ground-state quadrupole moment. We test this approach for well-measured low-lying $E2$ transitions in $^7$Li and $^9$Be, then provide predictions for transitions in $^8$Li and $^9$Li. In particular, we address the $2^+\rightarrow1^+$ transition in $^8$Li, for which the reported measured strength exceeds ab initio Green's function Monte Carlo (GFMC) predictions by over an order of magnitude.
