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The spectral data on the diffuse Galactic gamma-rays, at medium and highlatitudes (|b| > 10) and energies of 1-100 GeV, recently published by the FermiCollaboration are used to produce a novel study on the gamma-ray emissivity inthe Galaxy. We focus on analyzing the properties of propagation of cosmic rays(CRs), using the publicly available DRAGON code. We critically address some ofthe models for the interstellar HI and H2 gas distributions commonly used inthe literature, as well as test a variety of propagation models. Each modelassumes a distinct global profile for the diffusion and the re-acceleration ofCRs. Fitting propagation parameters to well measured local CRs such as, the B/Cratio, protons, antiprotons and electron, positron fluxes, we evaluate thegamma-ray spectra at medium and high latitudes in order to place furtherconstraints on these propagation models.

Diffuse Galactic Gamma Rays at Intermediate and High Latitudes, Constraints on ISM Properties