Analytical solution of steady-state spontaneously quenched γ-ray spectra for different values of the injection parameter Q₀ starting from 1.25 × 10^-3. Each value is increased by a factor of 5 over its previous value. Crosses denote in each case the value of ϵ_⋆. Other parameters used are: Γ = 2, ϵ_min = 33, ϵ_max = 2.3 × 10⁵, B = 40 G, and R = 3 × 10¹⁶ cm. The break energy is then ϵ_br = 160.