Phase: RAMI3BRF in the cross plane for multiple-scattered (two or more scattering events) radiation
brfop_mlt for HET01_DIS_UNI_RED_20 testcase.
brfop_mlt for HET01_DIS_UNI_RED_50 testcase.
brfop_mlt for HET01_DIS_UNI_NIR_20 testcase.
brfop_mlt for HET01_DIS_UNI_NIR_50 testcase.