On the attenuation of radio Cherenkov radiation from a cascade in a solid medium at ultrahigh energies

It is shown that the effect of the formation of electron-hole plasma during ionization of a solid mediumby a cascade developing in it can shield charge-excess Cherenkov radiation in the radio range used for detecting particles by radio detectors at energies above 10²⁰ eV. Such a shielding effect is strong in pure Antarctic ice and is weaker in lunar regolith; hence, the LORD experiment on the detection of cascades from ultrahigh-energy cosmic rays and neutrinos by circumlunar apparatuses retains the possibility of detecting particles to energies of ∼3 · 10²⁰ eV.