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arXiv 0710.1265nucl-th
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A = 6,7核电弱跃迁矩阵元的量子Monte Carlo计算

Quantum Monte Carlo calculations of electroweak transition matrix elements in A = 6,7 nuclei

Muslema Pervin, Steven C. Pieper, R. B. Wiringa

摘要:

本文报道了A= 6,7核的磁偶极、电四极、费米和伽莫夫-泰勒跃迁矩阵元的格林函数蒙特卡罗计算。矩阵元素外推从混合估计,括号变分蒙特卡罗和GFMC传播波函数之间的相关电弱算子。由于它们是非对角项,因此每个转换需要两个混合估计,其中VMC初始(最终)状态与GFMC最终(初始)状态配对。利用真实的Argonne v18双核子相互作用和Illinois-2三核子相互作用生成核态。在大多数情况下,我们发现很好的协议与实验数据。

英文摘要:

Green's function Monte Carlo calculations of magnetic dipole, electric quadrupole, Fermi, and Gamow-Teller transition matrix elements are reported for A=6,7 nuclei. The matrix elements are extrapolated from mixed estimates that bracket the relevant electroweak operator between variational Monte Carlo and GFMC propagated wave functions. Because they are off-diagonal terms, two mixed estimates are required for each transition, with a VMC initial (final) state paired with a GFMC final (initial) state. The realistic Argonne v18 two-nucleon and Illinois-2 three-nucleon interactions are used to generate the nuclear states. In most cases we find good agreement with experimental data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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