Measurement of rate coefficients for electron-atom collisions in a helium plasma by laser-induced fluorescence

1999 ◽  
Vol 32 (19) ◽  
pp. 4635-4646 ◽  
Author(s):  
R Denkelmann ◽  
S Maurmann ◽  
T Lokajczyk ◽  
P Drepper ◽  
H-J Kunze
Keyword(s):  
Laser Induced Fluorescence ◽  
Rate Coefficients ◽  
Helium Plasma ◽  
Electron Atom

Electron–atom interactions in dense semiclassical helium plasma

2022 ◽  
Vol 29 (1) ◽  
pp. 012101
Author(s):  
K. N. Dzhumagulova ◽  
E. O. Shalenov ◽  
Y. A. Tashkenbayev ◽  
T. S. Ramazanov
Keyword(s):  
Helium Plasma ◽  
Electron Atom

Measurement of the electron-atom collision integral in low-temperature helium plasma

1997 ◽  
Vol 42 (4) ◽  
pp. 341-345 ◽  
Author(s):  
A. D. Mezentsev ◽  
Yu. D. Stepanov ◽  
V. L. Fedorov
Keyword(s):  
Low Temperature ◽  
Collision Integral ◽  
Helium Plasma ◽  
Electron Atom ◽  
Atom Collision

A New AID for Interpolating and Assessing Collision Strengths and Rate Coefficients

1988 ◽  
Vol 102 ◽  
pp. 107-110
Author(s):  
A. Burgess ◽  
H.E. Mason ◽  
J.A. Tully
Keyword(s):  
Significant Loss ◽  
Impact Excitation ◽  
Rate Coefficients ◽  
Electron Impact Excitation ◽  
Graphical Display ◽  
Practical Procedure ◽  
Positive Ions ◽  
Allowed Transition ◽  
Computational Errors ◽  
Existing Data

AbstractA new way of critically assessing and compacting data for electron impact excitation of positive ions is proposed. This method allows one (i) to detect possible printing and computational errors in the published tables, (ii) to interpolate and extrapolate the existing data as a function of energy or temperature, and (iii) to simplify considerably the storage and transfer of data without significant loss of information. Theoretical or experimental collision strengths Ω(E) are scaled and then plotted as functions of the colliding electron energy, the entire range of which is conveniently mapped onto the interval (0,1). For a given transition the scaled Ω can be accurately represented - usually to within a fraction of a percent - by a 5 point least squares spline. Further details are given in (2). Similar techniques enable thermally averaged collision strengths upsilon (T) to be obtained at arbitrary temperatures in the interval 0 < T < ∞. Application of the method is possible by means of an interactive program with graphical display (2). To illustrate this practical procedure we use the program to treat Ω for the optically allowed transition 2s → 2p in ArXVI.

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