Opened 2 years ago

#355 new enhancement

improved three body recombination rates

Reported by: Gary J. Ferland Owned by: nobody
Priority: major Milestone:
Component: atomic/molecular data base Version: trunk
Keywords: Cc:

Description

This paper offers a simple equation 15 to give net 3-body recombination rates. This may be an improvement upon our current "Cota" rates.

Title:	
Plasma density effects on the three-body recombination rate coefficients
Authors:	
Hahn, Yukap
Affiliation:	
AA(Department of Physics, University of Connecticut, Storrs, CT 06269, USATRG, 49 Timber Drive, Storrs, CT 06268, USA)
Publication:	
Physics Letters A, Volume 231, Issue 1, p. 82-88.
Publication Date:	
02/1997
Origin:	
ELSEVIER
Abstract Copyright:	
(c) 1997 Elsevier Science B.V. All rights reserved.
DOI:	
10.1016/S0375-9601(97)00287-9
Bibliographic Code:	
1997PhLA..231...82H
Abstract

The existing reaction rate coefficients for the three-body recombination of 
ions with plasma electrons have a strong T-4.5 dependence on the electron 
temperature T, which seems to break down at low temperature, for T < 1 K 
?- 10 -4 eV. The obvious deficiency of the formula is the neglect of the 
plasma density effect on the recombined Rydberg states. A simple 
correctional procedure is adopted in terms of a density dependent cutoff of 
these high Rydberg states, which seems to improve the rates at low T. The 
total rate coefficients are now proportional to T-1, for the density N not too 
low. The T dependence is closely related to the density, so that the -4.5 
exponent is still valid at high T and low N region. Some numerical examples 
are given, and possible further improvements are suggested. The high and 
low T formulas interpolate smoothly through the principal quantum number 
cutoffs.

Change History (0)

Note: See TracTickets for help on using tickets.