Changes

= Intro =The relaxation dispersion model for no chemical exchange. This if for all [[SQ CPMG-type data]], [[:Category:MMQ CPMG data|MMQ CPMG-type data]], and [[R1rho-type data]]. This model is labelled as '''No Rex''' in [[Relaxation dispersion citation for relax|relax]].

The No Rex model has the parameter ${{:R2zero}} or {{:R1rhoprime}} depending on the data type. == Equation for No Exchange in CPMG==<math>R_{2,\textrm{eff}} = R_2^0$ or $R_</math> == Equation for No Exchange in R1rho==<math>\mathrm{R}_{1\rho}= \mathrm{R}_1\cos^2\theta + \mathrm{R}_{1\rho}'$ depending {´} \sin^2\theta </math> If no {{:R1}} values has been loaded, but the <code>R1_fit</code> flag has been turned on , the {{:R1}} will be fitted as well. For data typewithout a loaded offset, (see also [[Relax_disp.spin_lock_offset%2Bfield | relax disp.spin lock offset+field]] ), if <br><math>\bar{\Omega}_{S,i} = 0.0</math>then the Rotating frame tilt angle θ is set to: <math>\theta = \frac{\pi}{2}</math> and as such <br><math>cos^2\theta = cos^2\left( \frac{\pi}{2} \right) = 0.0</math> Therefore the fitted {{:R1}} values have no meaning for "No Rex" model, if there is no offset.<br>

* [http://www.nmr-relax.com/manual/model_no_chemical_exchange_relaxationThe_model_for_no_chemical_exchange_relaxation.html relax manual],

[[Category:Models]][[Category:Dispersion models]][[Category:Relaxation_dispersionanalysis]]