Autorelaxation rates   
Autorelaxation rates for an IS spin system as a function of DD (d) and CSA relaxation effects (c):
 
Autorelaxation
Rates
J(0)
J(wS)
J(wI-wS)
J(wI)
J(wI+wS)
ro
longitudinal
ro
transversal
RS(Sz)
0
3d+c
d
0
6d
0
0
RS(Sx)
2d+(2c/3)
(3d+c)/2
d/2
3d
3d
0
0
RI(Iz)
0
0
d
3d
6d
1
0
RI(Ix)
2d
3d
d/2
3d/2
3d
0
1
RIS(2IzSz)
0
3d+c
0
3d
0
1
0
RIS(2IzSx)
2d+(2c/3)
(3d+c)/2
d/2
0
3d
1
0
RIS(2IxSz)
2d
c
d/2
3d/2
3d
0
1
RIS(2I1S1)
2c/3
(3d+c)/2
0
3d/2
6d
0
1
RIS(2I1S-1)
2c/3
(3d+c)/2
d
3d/2
0
0
1
 (from 94METH563)
where 
Thus, for instance, the following equations can be derived from the above table: