2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/150641A Thomas-Fermi model of a spherical shell of positive charge is investigated, under various boundary conditions. The electron distribution and the ionization charge are given particular attention.10 pages, latex, 8 Figures available per request from the authorChemical PhysicsCondensed MatterMaterials Sciencetext