Energy dependence of emitted intensity (left panel) and PD (right panel). Black, blue, green, orange, red, and magenta solid lines show the model for μ= 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0, respectively. The dot-dashed black curve (left) shows the intensity corresponding to the angle-independent result of model SIMPL, namely (1 − X_sc)B_E(T_bb)+X_scI_c(E) (see Sect. 2.1.1). The model was calculated with the parameters shown in Table 1.