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Transitions between States of the Hyperfine Structure of Antiprotonic 4He in Collisions with Atoms of the Medium: Interaction Ab Initioстатья
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 25 ноября 2020 г.
- Авторы: Bibikov A.V., Korenman G.Ya, Yudin S.N.
- Журнал: Moscow University Physics Bulletin
- Том: 75
- Номер: 3
- Год издания: 2020
- Издательство: Allerton Press
- Местоположение издательства: New York, N.Y., United States
- Первая страница: 213
- Последняя страница: 217
- DOI: 10.3103/S0027134920030066
- Аннотация: Collisions of the metastable antiprotonic helium atoms with the atoms of the medium cause,among other processes, transitions between hyperfine structure (HFS) states, as well as shifts and broadening of microwave M1 spectral lines. To obtain the interaction potential matrix (p¯H¯e+)−He, the potential energy surface (PES) is calculated by the unrestricted Hartree–Fock method with consideration of the electron correlations within the second-order of perturbation theory (MP2). With this potential, the system of equations of close coupling of the HFS channels is numerically solved; the cross sections and transition rates, shifts, and broadenings of M1 spectral lines are calculated; they are then used to solve the kinetic equation that determines the time evolution of the HFS state density matrix. The results of these calculations are compared with the experimental data and with the results of model calculations. Keywords: antiproton, antiproton helium, hyperfine structure, collisional shift and broadening, potential energy surface, coupling of channels, quantum master equation.
- Добавил в систему: Коренман Григорий Яковлевич