“…Its nuclear properties present a special interest due to the very high neutron absorption of both boron (B) and europium (Eu) atoms for the thermal and especially for the fast neutrons [24][25][26]. In addition, EuB 6 is also believed to have a relatively lower work function (4.11 eV) [27], which can allow it to be used as a potential thermionic emission material. Therefore, EuB 6 has attracted considerable contemporary interest from both fundamental and practical viewpoints to have a relatively lower work function.…”