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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >A microscopic multiphonon approach to even and odd nuclei
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A microscopic multiphonon approach to even and odd nuclei

机译：偶数和奇核的微观多光处理方法

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摘要

The formalism of an equation of motion phonon method is briefly outlined. In even-even nuclei, the method derives equations of motion which generate an orthonormal basis of correlated n-phonon states (n = 0, 1, 2,...), built of constituent Tamm-Dancoff phonons, and, then, solves the nuclear eigenvalue problem in such a multiphonon basis. In odd nuclei, analogous equations yield a basis of correlated orthonormal multiphonon particle-core states to be used for the solution of the full eigenvalue equations. The formalism does not rely on approximations, but lends itself naturally to simplifying assumptions. As illustrated here, the method has been implemented numerically for studying the electric dipole response in the heavy neutron rich Pb-208 and Sn-132 and in the odd O-17 and F-17. Self-consistent calculations, using a chiral inspired Hamiltonian, have confirmed the important role of the multiphonon states in enhancing the fragmentation of the strength in the giant and pygmy resonance regions consistently with the experimental data.
机译：简要概述了运动声子方法方程的形式主义。在偶核偶核中，该方法导出运动方程，其生成相关的N-Phonon状态的正交基础（n = 0，1,2，......），构成的构成Tamm-Dancoff声子，然后，解决核心值在这种多人的基础上存在。在奇核核中，类似的方程产生相关的正交多洋颗粒核心状态的基础，用于溶液的全部值方程。形式主义不依赖于近似，但自然地借助简化假设。如本文所示，该方法已经在数值上实现，用于研究重中中子富型PB-208和Sn-132中的电偶极响应以及SN-132以及奇数O-17和F-17。使用手性启发的哈密顿人的自我一致的计算已经证实了多灵状态在始终如一地与实验数据始终如一地提高巨型和侏儒共振区域的强度碎片的重要作用。

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