We shall study the special case where the magnitude of the precession component \(\left|\Omega_{z}\right|\) of the angular velocity is much less than the magnitude of the spin component \(\left|\omega...We shall study the special case where the magnitude of the precession component \(\left|\Omega_{z}\right|\) of the angular velocity is much less than the magnitude of the spin component \(\left|\omega_{s}\right|\) of the spin angular velocity, \(\left|\Omega_{z}\right|<<\mid \omega_{s}\), so that the magnitude of the angular velocity \(|\vec{\omega}| \simeq\left|\omega_{\mathrm{s}}\right| \text { and } \Omega_{z} \text { and } \omega_{s}\) nearly constant.