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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Fourier transform spectroscopy and deperturbation analysis of the spin-orbit coupled A1Σ+ and b3Π states in RbCsтезисы доклада
- Авторы: Kruzins A., Alps K., Docenko O., Klincare I., Tamanis M., Ferber R., Pazyuk E.A., Stolyarov A.V.
- Сборник: Conference of the European 47 Group on Atomic Systems. Book of Abstracts
- Тезисы
- Год издания: 2015
- Место издания: Riga, Latvia
- Первая страница: 136
- Последняя страница: 136
- Аннотация: We present an extended study of the strongly spin-orbit coupled singlet A1Σ+ and triplet b3Π states (A − b complex for short) of the RbCs molecule, which provide an efficient optical path to transfer ultracold molecules to their rovibrational ground state, as demonstrated in [1]. Earlier several Fourier-transform (FT) studies were performed to obtain the term values of the A−b complex in RbCs, and to describe this complicated system by deperturbation model based on four A1Σ+ − b3Π(Ω=0,1,2) coupled-chanel (CC) approach [2,3]. However the achieved description of data have not reached the experimental accuracy. The goal of the present work was to obtain systematic term values data in the extended range of energy and quantum numbers of rovibronic levels, and to perform the CC deperturbation analysis allowing to reproduce the data with experimental accuracy. In the experiment the A − b - X and (4)1Σ+ - A − b laser induced fluorescence (LIF) FT spectra were recorded. RbCs molecules were produced in a heat pipe at 310 oC. A number of diode lasers covering the wavelenght range from 830 nm to 1050 nm were used to excite directly the A − b complex. In a different scheme, a single mode dye laser (Coherent 699-21) was used to excite the (4)1Σ+ state with subsequent observation of LIF signal to the A − b complex. The latter scheme allowed us to observe "dark" levels of the triplet b3Π state far below the minimum of the singlet A state. Overall 8730 rovibronic term values of A1Σ+ and b3Π states of 85Rb133Cs and 87Rb133Cs isotopologues were determined with an uncertainty of 0.01 cm−1 in the energy range [9012, 14087] covering rotational quantum numbers J 2 [6, 324]. An energy-based deperturbation analysis performed in the framework of the four A1Σ+ −b3 (Ω =0,1,2) coupled-channels approach reproduces 97% experimental term values of both isotopologues with a standard deviation of 0.0036 cm−1. The reliability of the deperturbed mass-invariant potentials and spin-orbit coupling functions of the interacting A1Σ+ and b3Π states is additionally proved by a good reproduction of the A − b - X and (4)1Σ+ - A − b relative intensity distributions. The support from the Latvian Science Council Grant No. 119/2012 is gratefully acknowledged by Riga team and RFBR grant No. 13-03-00446-a by Moscow team. References [1] T. Takekoshi et al. Phys. Rev. Lett. 113, 205301 (2014) [2] T. Bergeman et al. Phys. Rev. A 67, 050501 (2003) [3] O. Docenko et al. Phys. Rev. A 81, 042511 (2010) [4] A. Kruzins et al. J. Chem. Phys. 141, 184309 (2014)
- Добавил в систему: Пазюк Елена Александровна