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Author(s):
K. Moribayashi and T. Kato
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Title:
Atomic Nuclear Charge Scaling for Dielectronic Recombination to Be-like Ions
Date of publication:
Apr. 1997
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Key words:
dielectronic recombination rate coefiicient, Beryllium-like ion, energy level radiative transition probability, autoionization rate atomic nuclear charge scaling autoionzatio state, Cowan's code
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Abstract:
The atomic nuclear charge (Z) scaling for the dielectronic recombination (DR) rate coefficient (alpha) to the 0^4+, Ne^6+, Mg^8+, p^ll+, Ar^l4+, Ca^l6+, V^19+, Fe^22+ ions as well as the auger energy (Delta E), the radiative transition probability (Ar), and the autoionization rate (Aa) for the Be-like ions is studied. For the calculation of the energy levels Ar and Aa values, Cowan's code is employed. Not only the doubly excited Is^22pnl states but also the Is^23lnl'(1 = s,p, d) are considered as the autoionization ones. In the DR processes, at low Z, only the Is^22pnl rightarrow Is^22snl and Is^23pnl rightarrow Is2^2snl processes give a significant contribution. While, at high Z, the Is^23s(or d)nl rightarrow Is^22pnl and Is2^2pnl -> Is22pn'l' processes also become important. The dielectronic recombination rate coefficient to the final excited Is^22snl show weak Z-dependence, on the other hand, those to the final excited Is^22pnl states have a strong Z-dependence.
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