The M61 2-site fast exchange R_1ρ model

This is the model for 2-site fast exchange for on-resonance R_1ρ-type data. It is selected by setting the model to `M61', here named after Meiboom (1961). The equation for the exchange process is

$${\frac{{\Phi_{\textrm{ex}}\textrm{k}_{\textrm{ex}}}}{{\textrm{k}_{\textrm{ex}}^2 + \omega_{\textrm{e}}^2}}}$$ (11.73)

The reference for this equation is:

• Meiboom (1961)

More information about the M61 model is available from:

• the relax wiki at http://wiki.nmr-relax.com/M61,
• the API documentation at http://www.nmr-relax.com/api/3.2/lib.dispersion.m61-module.html,
• the relaxation dispersion page of the relax website at http://www.nmr-relax.com/analyses/relaxation_dispersion.html#M61.