Fig. 1. Time dependence of excitation probability in the case of a long pulse (α = 2) and δ = 0 for different optical depths: solid line, Λ = 5; dotted line, Λ = 7; dashed line, Λ = 10.

Fig. 2. Time dependence of excitation probability in the case of a short pulse (α = 0.1) and δ = 0 for different optical depths: solid line, Λ = 5; dotted line, Λ = 10; dashed line, Λ = 20.

Fig. 3. Time dependence of excitation probability in the case of an optical depth of Λ = 5 and δ = 1 for different pulse durations: solid line, α = 0.1; dotted line, α = 0.5; dashed line, α = 1.

Fig. 4. Time dependence of excitation probability in the case of an optical depth of Λ = 20 and δ = 1 for different pulse durations: solid line, α = 0.1; dotted line, α = 0.5; dashed line, α = 1.

Fig. 5. Time dependence of excitation probability in the resonant case (δ = 0) and Λ = 10 for different pulse durations: solid line, α = 0.1; dotted line, α = 0.2; dashed line, α = 1.

Fig. 6. Time dependence of excitation probability in the nonresonant case (δ = 1) and Λ = 10 for different pulse durations: solid line, α = 0.1; dotted line, α = 0.2; dashed line, α = 1.