2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185610We compute by means of the Bethe Ansatz the boundary S matrix for the open anisotropic spin-1/2 chain with diagonal boundary magnetic fields in the noncritical regime (Delta > 1). Our result, which is formulated in terms of q-gamma functions, agrees with the vertex-operator result of Jimbo et al.9 pages, LaTeX, no figuresHigh Energy Physics - TheoryExactly Solvable and Integrable Systemstext