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arXiv 1102.4193nucl-th
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相对论性能量密度泛函:平均场及以外

Relativistic Nuclear Energy Density Functionals: Mean-Field and Beyond

Tamara Niksic, Dario Vretenar, Peter Ring

摘要:

相对论性能量密度泛函(EDF)已成为原子核结构计算的标准工具,它提供了对核基态和集体激发的完整、准确、全局的描述。在核物质中微观核子自能的介质依赖性的指导下,半经验泛函被调整到核物质状态方程和有限核的体性质中,并被应用于任意重核、远离稳定的奇异核,甚至核子滴线处的系统的研究。基于REDF的结构模型也已经开发出来,超越了静态平均场近似,并包括集体相关的恢复打破对称性和波动的集体变量。这些模型被用于分析与壳层演化有关的结构现象,包括激发谱和电磁跃迁率的详细预测。

英文摘要:

Relativistic energy density functionals (EDF) have become a standard tool for nuclear structure calculations, providing a complete and accurate, global description of nuclear ground states and collective excitations. Guided by the medium dependence of the microscopic nucleon self-energies in nuclear matter, semi-empirical functionals have been adjusted to the nuclear matter equation of state and to bulk properties of finite nuclei, and applied to studies of arbitrarily heavy nuclei, exotic nuclei far from stability, and even systems at the nucleon drip-lines. REDF-based structure models have also been developed that go beyond the static mean-field approximation, and include collective correlations related to the restoration of broken symmetries and to fluctuations of collective variables. These models are employed in analyses of structure phenomena related to shell evolution, including detailed predictions of excitation spectra and electromagnetic transition rates.

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