  The energy transfer spectra have been calculated for the coherent $\eta$
meson production in the proton nucleus reaction. The elementary reaction
occurring in the nucleus is considered as $ pN \to pN^*(1535) $; $ N^*(1535)
\to N\eta $. The $N^*(1535)$ excitation for the forward going proton and $\eta$
meson is occurred due to the $\pi^0$ and $\eta$ meson exchange interactions,
other mesons do not contribute in this process. The cross sections are
calculated for the $\pi^0$ and $\eta$ meson exchange interactions, and the
effect of their interference on the cross section is also studied. The initial
and final state interactions as well as the $N^*(1535)$ nucleus interaction are
addressed by the optical potentials. The distorted wave functions for proton
and $\eta$ meson are described by the eikonal form. The sensitivity of the
cross section to the hadron nucleus potential is presented.
