  In the present work, we report our in depth study of 12C(p,p'gamma)12C
reaction both experimentally and theoretically with proton beam energy ranging
from 8 MeV to 22 MeV. The angular distributions were measured at six different
angles. We discuss the gamma angular distributions, total cross sections values
for 4.438, 9.64, 12.7 and 15.1 MeV states. We also describe the theoretical
interpretation of our measurements using optical model analysis. We also report
the branching ratios from our measurements. For the first time, we have
measured the the cross section and branching ratio for the 9.64 MeV state.
