  One 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 $^4 He$,$^{16}O$,$^{12}C$
