Integrated flux of strong narrow line emission at 4.44 MeV as a function of angular distance, θ (or radial distance, r) from the hypothetical molecular clouds located at a distance of 200 pc. The diffusion coefficient of the CRs is D₀ = 4 × 10²⁸ cm²/s (solid lines) or D₀ = 4 × 10²⁶ cm²/s (dashed lines), and the mass of the molecular cloud is 1 × 10⁶ M_⊙ (black lines) or 1 × 10⁵ M_⊙ (gray lines).