Amplitudes of Superhyperfine Frequencies Displayed in the Electron-Spin-Echo Envelope

Some of the calculations presented in a previous paper [W. B. Mims, Phys. Rev. B 5, 2409 (1972)] have been extended in order to make it easier to find the amplitudes of the superhyperfine-frequency components in two- and three-pulse envelopes when $I>\mathrm{}\frac{1}{2}$. A simple recipe is given for deriving the stimulated-echo result from the two-pulse-echo result. The suppression of frequency components in the stimulated-echo envelope is also considered.