Pulse error compensating symmetric magic-echo trains.
We present improved line-narrowing sequences for dipolar coupled spin systems, based on a train of magic-echoes which are compensated for the effects of finite pulse widths and utilize symmetry properties of supercycles. Sequences are introduced for spectroscopy and imaging by proper choice of a phase alternating scheme. Using a 16 pulse time-suspension magic-echo cycle, the highest level of line-narrowing achieved was 2.7 Hz for the [100] direction of a single crystal of calcium fluoride, a reduction in linewidth by 4 orders of magnitude.
Boutis
G S
GS
Department of Nuclear Engineering, Massachusetts Institute of Technology, NW14-2217, 150 Albany Street, Cambridge, MA 02139, USA.
Cappellaro
P
P
Cho
H
H
Ramanathan
C
C
Cory
D G
DG