By Professor Ratko K. Janev, William D. Langer, Dr. Douglass E. Post Jr., Dr. Kenneth Evans Jr. (auth.)
Atomic and molecular procedures play a tremendous function in laboratory and astrophysical plasmas for a variety of stipulations, and make sure, partly, their electric, shipping, thermal, and radiation houses. The learn of those and different plasma houses calls for a data of the pass sections, response fee coefficients, and inelastic strength transfers for a number of collisional reactions. during this overview, we offer quantitative information regarding crucial collision approaches taking place in hy drogen, helium, and hydrogen-helium plasmas within the temperature variety from zero. 1 eV to twenty keY. the fabric offered here's according to released atomic and molecular collision info, theoretical calculations, and appro priate extrapolation and interpolation systems. This evaluate provides the homes of every response, graphs of the pass sections and response price coeffiCients, and the coefficients of analytical matches for those amounts. We current this data in a kind that would allow researchers who're no longer specialists in atomic physics to exploit the knowledge simply. The authors thank their colleagues on the Princeton Plasma Physics Laboratory and within the atomic physics group who've made many helpful feedback for the choice and presentation o. f t. he fabric. We gratefully recognize the wonderful technical advice of Elizabeth Carey for the typing, and Bernie Giehl for the drafting. This paintings used to be supported partly by way of the U. S. division of strength agreement No. DE-AC02-76-CHO-3073. Princeton, united states R. ok. Janev W. D. Langer September, 1987 ok. Evans, Jr. , D. E.
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Extra info for Elementary Processes in Hydrogen-Helium Plasmas: Cross Sections and Reaction Rate Coefficients
5 eV. 5 eV. 5 eV. 5 HO H* 1S eV. (3) (2pou; n=3) is a group of autodissociating states over which an average performed. ,........ 10 VI E N u > b v E u 1\ 10 10 '7 9 ........ II .. I -10 -II 10 I" " 10 _I 10 10! ··· 10 2 TorE(eV) b .. 2 (2) o~~~ represents a least squares fit to the experimental data. (3) For the mean energy distribution of ejected electrons
19 10 4 10 43 10 eV. Cross Section: Reference: E = 60 Takayanagi and Suzuki (1978) - 200 eV: Odiss(H*) exc 2 = oBOR se· Mean Energy of Reaction Products: Conunents: (1) 0exp is corrected from the values in Corrigan (196S) (see Takayanagi and Suzuki 1978). Below SO eV it is consistent with the two-state closecoupling calculations of Chung and Lin (1978), but the sum of o(a 3 t;) and o(c 3nu ) is a factor of 3 too large compared to the recent measurements by Khakoo and Trajmar (1986). 1S a Born- 0 c h kur-Rudge extrapolation of 0exp.
F/) u v 109 -10 10 -II 10 _I 10 ·· · ··· ··· ·· ·· I': ,, , ··· ·· E b . / · 108 ~ "> , ,, 10 16 , ,, N E u ,, , 10 17 b , -18 10 -19 10 ' 102 Tor E(eV) 10 4 10 29 (n>2) I Cross Section and Rate Coefficient: o. 56 x 10- 6 T- 1 • 5 exp(-Sn) (1. 32 Sn Vriens and Smeets (1980) Mean Energy of Ejected Electrons: