Cp contact hard.m

Cross-polarization NMR experiment in the rotating frame. Applies a pi/2 pulse using the specified operator and evolves the system with the irradiation operators added to the Liovillian. For the same experiment with a slightly different parametrisation, see cp_acquire.m

Syntax

    fid=crosspol(spin_system,parameters,H,R,K)

Arguments

    parameters.irr_powers - a vector containing the values
                            of the RF power (Hz) on each channel

    parameters.irr_opers  - a cell array of spin operators
                            corresponding to the irradiation
                            on each RF channel

    parameters.exc_opers  - excitation operator for the exci-
                            tation pulse (pi/2).

    parameters.rho0       - initial state

    parameters.coil       - detection state

    H - Hamiltonian matrix, received from context function

    R - relaxation superoperator, received from context function

    K - kinetics superoperator, received from context function

Outputs

    fid - signal detected on the coil state during 
          system evolution

Examples

An example of a 1H-15N CP matching condition scan under MAS (examples/nmr_solids/cp_powder_mas_1.m) appears below.

See also

overtone_cp.m, dante.m, cn2d_dq.m, cn2d_sq.m, mqmas.m

Solid state NMR experiments

Version 2.3, authors: Ilya Kuprov, Marina Carravetta, Phil Williamson