The square root of the mean-square end-to-end distance of a linear polymer
chain averaged over all conformations of the chain. For a freely jointed chain consisting of
segments each of length
, it is given by:
The subscript zero is used to indicate unperturbed dimensions, as in
If this term is used repeatedly, and if it is not confusing, the abbreviated name 'end-to-end distance
' may be used.
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook