Solomon echoes are satellite-transition signals superimposed on the free-induction decay (FID) of the central transition following the second pulse. In order to detect the Solomon echoes, the duration tau2 between the two pulses must be shorter than the duration of the FID of the central transition.
References containing data and graphs that can be simulated with the Solomon echo applets, in order to determine the quadrupole coupling from a featureless NMR lineshape, are provided:
C. Bonhomme and T. Aza´s
Geometrical description of echoes and macroscopic reorientation of samples in solid-state NMR,
C. R. Chimie 7, 417-424 (2004).
T. Aza´s, C. Bonhomme, L. Bonhomme-Coury, J. Vaissermann,
Y. Millot, P. P. Man, P. Bertani, J. Hirschinger, and J. Livage
Cubane shaped clusters, precursors for aluminophosphate frameworks: a solid state multinuclear NMR study, in time and frequency domains (PDF article, 337 Kb),
J. Chem. Soc., Dalton Trans. 609-618 (2002).
M. Mehring and V. A. Weberru▀
"Object-Oriented Magnetic Resonance. Classes and Objects, Calculations and Computations", (Academic, San Diego, 2001) p 261.
P. P. Man
Quadrupole couplings in nuclear magnetic resonance, general (PDF article, 720 Kb),
in "Encyclopedia of analytical chemistry", edited by R. A. Meyers (J. Wiley, Chichester, 12224-12265, 2000).
P. P. Man
Numerical analysis of Solomon echo amplitudes in static solids (PDF article, 230 Kb),
J. Chem. Phys. 106, 3908-3919 (1997).
S. Z. Ageev, P. P. Man, and B. C. Sanctuary
Solomon echoes for spin 7/2 by soft pulse excitation (PDF article, 520 Kb),
Mol. Phys. 88, 1277-1292 (1997).
Eun Kyu Jang and Oc Hee Han
A symbolic computation of spin echoes in solid-state NMR,
J. Korean Phys. Soc. 30, 115-122 (1997).
P. P. Man
Solomon echoes extended to soft pulse excitation,
Z. Naturforsch. a 49, 89-96 (1994).
"The Principles of Nuclear Magnetism", (Clarendon, Oxford, 1961) Chapter VII.
Multiple echoes in solids,
Phys. Rev. 110, 61-65 (1958).