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https://elib.bsu.by/handle/123456789/258240
Заглавие документа: | Analytic model of a multi-electron atom |
Авторы: | Skoromnik, O.D. Feranchuk, I.D. Leonau, A.U. Keitel, C.H. |
Тема: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика |
Дата публикации: | 2017 |
Издатель: | Institute of Physics Publishing |
Библиографическое описание источника: | J Phys B At Mol Opt Phys 2017;50(24). |
Аннотация: | A fully analytical approximation for the observable characteristics of many-electron atoms is developed via a complete and orthonormal hydrogen-like basis with a single-effective charge parameter for all electrons of a given atom. The basis completeness allows us to employ the secondary-quantized representation for the construction of regular perturbation theory, which includes in a natural way correlation effects, converges fast and enables an effective calculation of the subsequent corrections. The hydrogen-like basis set provides a possibility to perform all summations over intermediate states in closed form, including both the discrete and continuous spectra. This is achieved with the help of the decomposition of the multi-particle Green function in a convolution of single-electronic Coulomb Green functions. We demonstrate that our fully analytical zeroth-order approximation describes the whole spectrum of the system, provides accuracy, which is independent of the number of electrons and is important for applications where the Thomas-Fermi model is still utilized. In addition already in second-order perturbation theory our results become comparable with those via a multi-configuration Hartree-Fock approach. |
URI документа: | https://elib.bsu.by/handle/123456789/258240 |
DOI документа: | 10.1088/1361-6455/aa92e6 |
Scopus идентификатор документа: | 85035779965 |
Располагается в коллекциях: | Кафедра теоретической физики и астрофизики (статьи) |
Полный текст документа:
Файл | Описание | Размер | Формат | |
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1701.04800.pdf | 713,03 kB | Adobe PDF | Открыть |
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