The DPL94 2-site fast exchange R_1ρ model

This is the model for 2-site fast exchange for R_1ρ-type data. It is selected by setting the model to `DPL94', here named after Davis et al. (1994). It extends the Meiboom (1961) model to off-resonance data. The model collapses to the M61 model for on-resonance data. The equation for the exchange process is

$$\left(\vphantom{ \mathrm{R}_{1\rho}'+ \frac{\Phi_{\textrm{ex}}\te... ...{k}_{\textrm{ex}}}{\textrm{k}_{\textrm{ex}}^2 + \omega_{\textrm{e}}^2} }\right. {\frac{{\Phi_{\textrm{ex}}\textrm{k}_{\textrm{ex}}}}{{\textrm{k}_{\textrm{ex}}^2 + \omega_{\textrm{e}}^2}}} \left.\vphantom{ \mathrm{R}_{1\rho}'+ \frac{\Phi_{\textrm{ex}}\te... ...{k}_{\textrm{ex}}}{\textrm{k}_{\textrm{ex}}^2 + \omega_{\textrm{e}}^2} }\right)$$ (11.75)

where θ is the rotating frame tilt angle. The reference for this equation is:

• Davis et al. (1994)

More information about the DPL94 model is available from:

• the relax wiki at http://wiki.nmr-relax.com/DPL94,
• the API documentation at http://www.nmr-relax.com/api/3.2/lib.dispersion.dpl94-module.html,
• the relaxation dispersion page of the relax website at http://www.nmr-relax.com/analyses/relaxation_dispersion.html#DPL94.