Dynamic orientation of nuclei with spin >1

The dynamic orientation of nuclei with spin >1 is theoretically investigated in experimental samples where the nucleus is in well resolved hyperfine interaction with a paramagnetic ion of spin (1/2). It is shown that the contribution from off-diagonal elements of the relevant density matrix vanishes in the steady state, and the rate equation approach is justified. The nuclear orientation parameters are computed using the simplified method of partial distributions, both at low and high temperatures, and numerical results are presented for Pa(4+) in Cs(2)ZrCl(6).