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    Penningionization processes involving cold Rydberg alkali metal atoms

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    Type
    Article
    Authors
    Zalam, Alaa Abo
    Dimitrijević, Milan S. cc
    Srećković, Vladimir A. cc
    Bezuglov, Nikolai N. cc
    Miculis, Kaspars
    Klyucharev, Andrey N.
    Ekers, Aigars cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Embargo End Date
    2021-12-07
    Submitted Date
    2020-09-16
    Permanent link to this record
    http://hdl.handle.net/10754/666286
    
    Metadata
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    Abstract
    Abstract: This paper investigates the Penning ionization (PI) processes in cold gas media of alkali atoms. The PI autoionization widths of atomic pairs show a drastic dependence (by orders of magnitude) on the orbital quantum numbers of Rydberg atoms involved in a long-range dipole-dipole interaction. The nontrivial dependence of the PI efficiency on the size of colliding particles was considered, with a particular accent to the applications in the research of cold matter created in the experiments with magneto-optical traps. We have analytically described the optimal, highly asymmetric configurations of atomic Rydberg pairs, which lead to an explosive intensification (by several orders of magnitude) of a free-electron escaping due to PI. The excited states of atoms in the optimal pairs turn out to have a strong difference in atomic shell sizes. The optimal pairs’ properties may be favorable for the generation of primary (seeding) charged particles when a cold Rydberg medium evolves into a cold plasma. Within the framework of the semiclassical approach, we have obtained universal analytical formulas containing two adjustable parameters and present here their values in tabulated form, which allows estimating the PI rate constants for various pairs of alkali metal atoms. Graphical abstract: [Figure not available: see fulltext.]
    Citation
    Zalam, A. A., Dimitrijević, M. S., Srećković, V. A., Bezuglov, N. N., Miculis, K., Klyucharev, A. N., & Ekers, A. (2020). Penningionization processes involving cold Rydberg alkali metal atoms. The European Physical Journal D, 74(12). doi:10.1140/epjd/e2020-10507-7
    Publisher
    Springer Science and Business Media LLC
    Journal
    European Physical Journal D
    DOI
    10.1140/epjd/e2020-10507-7
    Additional Links
    http://link.springer.com/10.1140/epjd/e2020-10507-7
    ae974a485f413a2113503eed53cd6c53
    10.1140/epjd/e2020-10507-7
    Scopus Count
    Collections
    Articles; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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