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Wyszukujesz frazę "33.80.Eh" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Ultra-Short Lived Non-Rydberg Doubly Excited Resonances Observed in Molecular Photoionization of CO and N$\text{}_{2}$ Molecules
Autorzy:
Erman, P.
Karawajczyk, A.
Köble, U.
Rachlew, E.
Stankiewicz, M.
Yoshiki-Franzen, K.
Veseth, L.
Powiązania:
https://bibliotekanauki.pl/articles/1963374.pdf
Data publikacji:
1997-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.80.Eh
Opis:
Our group has recently carried out measurements of dispersed fluorescence from photo-excited N$\text{}_{2}$ and CO molecules in 19-34 eV excitation energy range using the Swedish synchrotron radiation facility MAX in Lund. The experimental results show that relative intensities of the fluorescence from different vibrational levels of the excited N$\text{}_{2}^{+}$ and CO$\text{}^{+}$ vary with the excitation energy. We associate this phenomenon with the existence of doubly excited states in N$\text{}_{2}$ and CO in the corresponding energy regions. Our results show that the widths of the newly revealed states correspond to their lifetimes of the order of few femtoseconds.
Źródło:
Acta Physica Polonica A; 1997, 91, 4; 763-767
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-Coincidence Studies of Fragmentations of Core Excited OCS Molecules
Autorzy:
Erman, P.
Karawajczyk, A.
Rachlew, E.
Stankiewicz, M.
Yoshiki-Franzen, K.
Powiązania:
https://bibliotekanauki.pl/articles/1963375.pdf
Data publikacji:
1997-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.80.Gj
33.80.Eh
Opis:
Molecular fragmentation following photon excitation of core electrons from K shells of C and O and L shell of S atoms forming the OCS molecule was studied. Emerging photoelectrons and charged fragments were detected in coincidence. Application of time-of-flight spectroscopy together with triple coincidence photoelectron-photoion-photoion, double coincidence photo-electron-photoion and photoion-photoion techniques allow a detailed insight into the geometry and the dynamics of the de-excitation processes and an unambiguous assessment of all fragmentation channels of highly excited molecules. Such studies are of major interest in fundamental research and they are relevant also in environmental, biological and technological investigations.
Źródło:
Acta Physica Polonica A; 1997, 91, 4; 769-773
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Escape of O⁺ and CO⁺ Ions from Mars and Titan Atmospheres by Coulomb Explosion of CO₂²⁺ Molecular Dications
Autorzy:
Falcinelli, S.
Powiązania:
https://bibliotekanauki.pl/articles/1033346.pdf
Data publikacji:
2017-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
31.15.ag
31.50.Bc
33.15.Ta
33.80.Eh
37.20.+j
95.30.Cq
95.30.Dr
95.30.Ft
95.30.Ky
94.05.Rx
94.20.Cf
94.20.D-
94.20.dv
94.20.W-
94.20.wg
Opis:
Main properties of multiply charged molecular ions (energetics, structure, stability, lifetime and fragmentation dynamics) are relevant to know and to model the behavior of gaseous plasmas, planetary ionospheres, and astrophysical environments. Experimental measurements of the kinetic energy released of fragment ions produced by the Coulomb explosion of molecular dications (doubly charged molecular species) originating by double photoionization of CO₂ molecules, are reported and discussed. The kinetic energy released, as a function of the UV photon energy in the range of 34-50 eV, is extracted from the electron-ion-ion coincidence spectra recorded by using tunable synchrotron radiation coupled with ion imaging techniques at the GasPhase beam line of ELETTRA Synchrotron Light Laboratory Trieste, Italy. This kind of experiment allows assessing the probability of escape for simple ionic species in the ionosphere of Mars and Titan. The kinetic energy released, measured in the case of O⁺ and CO⁺ fragment ions, are ranging between 1.0-5.0 and 0.4-3.0 eV, respectively. These values are large enough to allow such ionic species in participating in the atmospheric escape from Mars (only O⁺ ions) and Titan (both O⁺ and CO⁺ ions) into space. In the case of Mars, we suggest a possible rationalization for the observed behavior of the O⁺ and CO₂²⁺ ion density profiles by Viking 1 lander and Mariner 6 spacecraft.
Źródło:
Acta Physica Polonica A; 2017, 131, 1; 112-116
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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