Difference between revisions of "CR72"
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== Equation == | == Equation == | ||
[http://www.nmr-relax.com/manual/Dispersion_model_summary.html Please see the summary of the model parameters here.] | [http://www.nmr-relax.com/manual/Dispersion_model_summary.html Please see the summary of the model parameters here.] | ||
| + | |||
| + | <math> | ||
| + | R_{2,\textrm{eff}} = \frac{R_2^A+R_2^B+k_{\textrm{EX}}}{2} - \nu_{\textrm{cpmg}} \cosh^{-1} (D_+\cosh(\eta_+) - D_-\cos(\eta_-)) | ||
| + | </math> | ||
== Parameters == | == Parameters == | ||
Revision as of 17:45, 28 April 2014
The Carver and Richards 1972 2-site relaxation dispersion model for SQ CPMG-type data for most time scales whereby the simplification $R_{2A}^0$ = $R_{2B}^0$ is assumed. This model is labelled as CR72 in relax.
Equation
Please see the summary of the model parameters here.
[math] R_{2,\textrm{eff}} = \frac{R_2^A+R_2^B+k_{\textrm{EX}}}{2} - \nu_{\textrm{cpmg}} \cosh^{-1} (D_+\cosh(\eta_+) - D_-\cos(\eta_-)) [/math]
Parameters
The CR72 model has the parameters {$R_2^0$, $...$, $p_A$, $\Delta\omega$, $k_{ex}$}.
Reference
The reference for the CR72 model is:
- Carver, J. and Richards, R. (1972). General 2-site solution for chemical exchange produced dependence of T2 upon Carr-Purcell pulse separation. J. Magn. Reson., 6(1), 89-105. (10.1016/0022-2364(72)90090-X).
Related models
The CR72 model is a parametric restriction of the CR72 full model.
Links
The implementation of the CR72 model in relax can be seen in the:
