2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/101401We used microwave radiation to evaporatively cool a mixture of of 133Cs and 87Rb atoms in a magnetic trap. A mixture composed of an equal number (around 10^4) of Rb and Cs atoms in their doubly polarized states at ultracold temperatures was prepared. We also used microwaves to selectively evaporate atoms in different Zeeman states.9 pages, 6 figuresAtomic Physicstext