Calculate T1, T2 or T1rho relaxation constants

In Analysis, is it possible to calculate relaxation constants or time constants from a T1, T2 and T1rho relaxation series. To get the relaxation constants we first need to perform a relaxation analysis. To perform the analysis, do as follows:

• • Specify the NMR series in the Experiment: NMR Series popup accessible through M: Experiment: NMR Series.

  • Go to M: Data Analysis: Follow Intensity Changes and select the {Settings} tab:

• • Set Reference Peak List, NMR Experiment Series, Relaxation options, Fitting Function and other parameters of interest and end by clicking [Group & Fit Peaks].

The result from the relaxation analysis should now appear in the {Peak Groups & Analysis} tab.

The time constant for each peak group is stored in the |TC| column. This is calculated from the Fitting Function e.g. the inverse of an exponential decay rate; i.e. the "B" in "A exp(-Bx)". You can choose to create a dedicated list by pressing [Make T1 List] (or T2.....). This simply records the T1 values (as indicated by the TC column) in a list of NMR measurements that are saved when your CCPN project is saved. This data may be looked at any time in the future (and even deleted) through M: Data Analysis: Measurement Lists.

An example of a T1 relaxation analysis is found here.