2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/29637Using continued fractions we obtained the exact result for the density of magnon states of the regularly alternating spin-1/2 XX chain with Dzyaloshinskii-Moriya interaction. We examined the stability of the magnetic chain with respect to the spin-Peierls dimerization.4 pages, latex with pmart.sty (included), no figures; poster presentation at the European Conference "Physics of Magnetism 99", Poznan 1999Condensed Mattertext