Trusted, Bureaucrats
4,223
edits
Changes
→Equation for No Exchange in R1rho: Switched to parameter templates for R1.
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
</math>
== Equation for No Exchange in R1rho==
<math>
\mathrm{R}_{1\rho}= \mathrm{R}_1\cos^2\theta + \mathrm{R}_{1\rho}{´} \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 without 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>
== Reference ==