Ab Initio Calculations of the Electronic Structure of the Doublet and Quartet States of the Rubidium Trimer

Bormotova, E.; AS, L.; AV, S.

Авторы: Bormotova EA, AS Likharev, AV Stolyarov
Журнал: Optics and Spectroscopy (English translation of Optika i Spektroskopiya)
Том: 132
Номер: 3
Год издания: 2024
Издательство: Optical Society of America
Местоположение издательства: United States
Первая страница: 223
Последняя страница: 233
DOI: 10.1134/S0030400X24030044
Аннотация: Systematic quantum chemical calculations were performed for the ground and a number of low- lying electronically excited doublet and quartet states of the rubidium trimer molecule. The obtained poten- tial energy surfaces (PES), spin-orbit couplings (SOC) and electronic transition dipole moments (ETDM) can be useful for optimizing paths for laser synthesis, cooling and manipulation of stable ensembles of Rb3 molecules at ultralow temperatures. Ab initio calculations of the electronic structure of the homonuclear Rb3 molecule, in linear, isosceles triangle and equilateral triangle geometries, were performed using the multi-reference configuration interaction method, taking into account single and double excitations (MR-CISD) and with explicit dynamic correlation of only the three valence electrons. The structure of each atom was approximated using a nine-electron effective core potential (ECP28MDF), and molecular orbitals (MOs) were optimized using the spin averaged (over doublet and quartet states) multi-configuration self-con- sistent field (SA-CASSCF) method. Core–valence correlations between twenty-four subvalence electrons located on doubly occupied MOs and three valence electrons were implicitly taken into account using a one- electron angular momentum-independent Müller–Mayer core polarization potential (CPP). As a result of topological investigations at over 35000 points, two dimensional PES, SOC, and ETDM functions were obtained and the geometric parameters Rb3 were found at which the most intense vertical transitions and the maximum influence of the SOC are expected.
Добавил в систему: Столяров Андрей Владиславович

	ИСТИНА	Войти в систему Регистрация
	ИСТИНА ИНХС РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИСТИНА ИНХС РАН

Ab Initio Calculations of the Electronic Structure of the Doublet and Quartet States of the Rubidium Trimerстатья Перевод Исследовательская статья

Прикрепленные файлы