  The photonuclear reaction in the multi-GeV region occurs because of the
electromagnetic and hadronic interaction. The later originates due to the
hadronic fluctuation, i.e., vector meson, of the photon. The total cross
section of the reaction is shadowed because of the vector meson nucleus
(hadronic) interaction. To estimate it quantitatively, the cross section of the
photonuclear reaction was calculated in the low energy region ($\sim 1-3$ GeV)
using simple vector meson dominance (SVMD) model, i.e., the low lying vector
mesons ($\rho^0$, $\omega$ and $\phi$ mesons) were considered. The nuclear
shadowing is reinvestigated using generalized vector meson (GVMD) model, where
the higher $\rho$ meson effective state ($\rho^\prime$ meson) is taken into
account along with the low lying vector mesons. Using GVMD model, the shadowing
and the total cross section of the photonuclear reaction are calculated in the
above mentioned energy region. The calculated results have been compared with
the measured spectra.
