2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/106493One Delta- isobar components of the wave function in closed shell nuclei are considered within the framework of the harmonic oscillator model. Conventional transition potential is the pi- and rho- exchange potential. On the basis of the Delta- isobar configuration wave function, the momentum distribution of the Delta- isobar is calculated for the light nuclei $^4 He$,$^{16}O$,$^{12}C$20 pages, 1 Postscript figure, LaTex, minor grammatical changes of the papertr.tex, line 3 of the Abstract: the verb "are" was replaced by the verb "is"Nuclear Theorytext