Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apj...681.1653k&link_type=abstract
The Astrophysical Journal, Volume 681, Issue 2, pp. 1653-1659.
Astronomy and Astrophysics
Astronomy
2
Acceleration Of Particles, Atomic Processes, Sun: Flares, Sun: Particle Emission
Scientific paper
We introduce a simplified method to calculate the cross sections and rates of ionization and recombination of accelerated ions with arbitrary nuclear charge Z and atomic mass number A. Calculations of equilibrium and nonequilibrium charge states of the element Tellurium (Te, Z=52) are presented for the first time. The validity of the proposed method is demonstrated by showing that predictions for Si and Fe are in agreement at energies characteristic for energetic (>=0.15 MeV nucleon-1) ultraheavy ions with the results of a more sophisticated model. We find that while the charge states for Te come out higher than those for Fe under similar conditions, the Q/A values for Te fall consistently below those for Fe over the entire energy range and under all comparable conditions, thus extending the trend in Q/A that is observed when going to higher mass elements. Implications of our results for the observed enrichments of ultraheavy ions in solar energetic particle events are discussed.
Dröge Wolfgang
Kartavykh Yulia
Klecker Berndt
Kocharov Leon
Kovaltsov Gennadi A.
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