The M61 2-site fast exchange R1ρ model

This is the model for 2-site fast exchange for on-resonance R1ρ-type data. It is selected by setting the model to `M61', here named after Meiboom (1961). The equation for the exchange process is

R1ρ = R1ρ' + $\displaystyle {\frac{{\Phi_{\textrm{ex}}\textrm{k}_{\textrm{ex}}}}{{\textrm{k}_{\textrm{ex}}^2 + \omega_{\textrm{e}}^2}}}$. (11.73)

The reference for this equation is:

More information about the M61 model is available from:

The relax user manual (PDF), created 2020-08-26.