Statistics – Applications
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...254..412c&link_type=abstract
Astrophysical Journal, Part 1, vol. 254, Mar. 1, 1982, p. 412-418. Research sponsored by the U.S. Department of Energy.
Statistics
Applications
30
Atomic Collisions, Atomic Excitations, Collision Rates, Electron Impact, Electron Transitions, Curve Fitting, Ionic Collisions, Isoelectronic Sequence, Maxwell-Boltzmann Density Function, Wave Interaction
Scientific paper
For many applications, a large number of rate coefficients for electron impact excitation are needed. These rate coefficients may be obtained by integration of the collision strength. Fits to collision strengths are presented as a function of both the nuclear change Z and X, the impact electron energy in threshold units. The collision strength fit form is readily integrated over a Maxwellian distribution and has fitted extensive distorted wave data to nearly 5% from singly ionized stages to molybdenum for 19 spin-allowed transitions of the isoelectric sequences of hydrogen, helium, lithium, beryllium, boron, sodium, and magnesium. The excitation energies have been fitted as a function of Z to better than 1%.
Clark Robert E. H.
Magee Norman H. Jr.
Mann Joseph B.
Merts A. L.
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