2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37047The methods of neutrino spectra calculations with GEANT library and the peculiarities of such calculations for different neutrino beams are summarized. The formula expressing $K^0$ yields from a neutrino target through the $K^+$ and $K^-$ yields from the same target is proposed15 pages, 7 figuresHigh Energy Physics - Experimenttext