cp_acquire_soft.m
Cross-polarisation experiment in the rotating frame, followed by time-domain FID acquisition. The CP stage is preceded by wiping of the low-gamma spins and followed by FID acquisition with decoupling of the high-gamma spins.
Syntax
fid=cp_acquire_soft(spin_system,parameters,H,R,K)
Arguments
parameters.spins - working spins, a cell array of
strings with high-gamma spin fi-
rst, and low-gamma spin last,
for example {'1H','13C'}
parameters.hi_pwr - nutation frequency of the exci-
tation pulse on the high-gamma
channel, Hz
parameters.cp_pwr - nutation frequencies on the two
channels during the CP contact
time, a two-element vector, Hz
parameters.cp_dur - duration of the contact time, s
parameters.rho0 - initial state, the state of the
low-gamma spins will be wiped
parameters.coil - detection state
parameters.sweep - sweep width for the FID, Hz
parameters.npoints - number of points in the FID
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
Below is the output of examples/nmr_solids/cp_acquire_mas_gly.m example file, showing 1H-13C cross-polarisation followed by acquisition under magic angle spinning in alpha-glycine powder.
See also
cp_contact_soft.m, cp_contact_hard.m, overtone_cp.m
Version 2.9, authors: Marina Carravetta, Phil Williamson, Guinevere Mathies, Ilya Kuprov
