2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46288We consider interactions of fermions with the domain wall bubbles produced during a first order phase transition. A new exact solution of the Dirac equations is obtained for a wall profile incorporating a position dependent phase factor. The reflection coefficients are obtained.14 pages, 3 eps figures (epsfig macro neccesary). uuencoded. also avalaible at http://www-itp.unibe.ch/~torrenteHigh Energy Physics - Phenomenologytext