In the frame of a systematic study of deuteron induced nuclear reactions on all elements, activation cross sections on $$^{\mathrm {nat}}$$
nat
Se were investigated. Excitation functions were measured up to 50 MeV particle energy for production of $$^{\mathrm {82}}$$
82
Br(m$$+)$$
+
)
,$$^{\mathrm {80m}}$$
80
m
Br, $$^{\mathrm {77}}$$
77
Br(m$$+)$$
+
)
,$$^{\mathrm {76}}$$
76
Br(m$$+)$$
+
)
, $$^{\mathrm {75}}$$
75
Br, $$^{\mathrm {75}}$$
75
Se(cum), $$^{\mathrm {73}}$$
73
Se(cum), $$^{\mathrm {76}}$$
76
As,$$^{\mathrm {74}}$$
74
As, $$^{\mathrm {73}}$$
73
As(cum), $$^{\mathrm {72}}$$
72
As and $$^{\mathrm {71}}$$
71
As(cum) by using the activation method through stacked foil irradiation followed by off-line gamma-ray spectrometry. The experimental results were compared to the earlier experimental data and to excitation functions calculated with the ALICE-D and EMPIRE-D theoretical model codes and data given in the TENDL-2019 on-line library based on TALYS calculations.