Temat: 33.80.Be - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Stark-Chirped Rapid Adiabatic Passage in a Multilevel Atom
Autorzy:: Radonjić, M.
Jelenković, B.
Powiązania:: https://bibliotekanauki.pl/articles/1791192.pdf
Data publikacji:: 2009-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 32.80.Qk
32.80.Xx
33.80.Be
Opis:: We generalize Stark-chirped rapid adiabatic passage to the case of a multilevel atom. The atom is assumed to have two ground state levels g and f and an excited level e. The adiabatic passage is carried out by resonantly driving the g-e and f-e transitions with time-dependent pump and Stokes fields in the presence of strong far-off-resonant Stark field. Our formalism determines the states that participate in population transfer and is applicable to systems with arbitrary numbers of degenerate states in each level and arbitrary couplings of the g-e and f-e transitions. We give an application to adiabatic passage in Rb atom.
Źródło:: Acta Physica Polonica A; 2009, 116, 4; 476-478
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effects of Solute-Solvent Interactions on Radiationless Decay of Thioketones Excited to Their S$\text{}_{2}$- and T$\text{}_{1}$-States
Autorzy:: Szymański, M.
Balicki, M.
Binkowski, M.
Kubicki, J.
Maciejewski, A.
Pawłowska, E.
Wróżowa, T.
Powiązania:: https://bibliotekanauki.pl/articles/1945389.pdf
Data publikacji:: 1996-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 33.50.Dq
33.50.Hv
35.80.Be
Opis:: Spectral and photophysical properties of a few aromatic thioketones in their S$\text{}_{2}$- and T$\text{}_{1}$-states, in particular those determined by their interactions with solvents, are discussed. The reasons for a drastically different behaviour of thioketones in interactions with benzene as well as saturated hydrocarbons and perfluoroalkanes are analysed in more detail. Results of the time-resolved transient absorption measurements in the pico- and nanosecond time scale are given. An analysis of these results proves that a product of the decay of the S$\text{}_{2}$-state of xanthione in benzene is a new transient (τ $\text{}_{1}\text{}_{/}\text{}_{e}$ ≥ 60 ps) individuum which, regarding the system properties and the conditions of the experiment, has been identified as an exciplex in S$\text{}_{2}$-state formed as a result of an efficient interaction with benzene molecule. Also in xanthione//alkane systems the involvement of a transient individuum was proved. Most probably, this individuum was a thioketyl radical which could be formed by hydrogen abstraction from a hydrocarbon molecule by xanthione in the S$\text{}_{2}$-state. Such individua act as intermediates in passing excitation to the triplet states of thioketones and are effective channels of the S$\text{}_{2}$-state decay. The changes observed in the transient absorption spectra of xanthione in C$\text{}_{6}$H$\text{}_{6}$ in the time range of 10$\text{}^{-7}$-10$\text{}^{-6}$ s can be attributed to the formation of an excimer in the T$\text{}_{1}$-state as a result of the T$\text{}_{1}$-state selfquenching.
Źródło:: Acta Physica Polonica A; 1996, 89, 4; 527-546
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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