  We consider a possibility of the magnetostatic type spin waves driven by a
long-range magnetic dipole interactions, to account for the peaks in the ESR
spectra observed in our previous work. The Walker equation for magnetostatic
modes is solved for a cylinder of atomic hydrogen, first in a uniform magnetic
field and second in a linearly decreasing magnetic field. The frequency
behavior of the solved modes with length of the cylinder and density of the gas
is compared to experimental data. We conclude that magnetostatic modes are
unlikely to account for the observed modulations of ESR spectra.
