Activation cross sections of the nat La(p,x) 139,137m,137g,135,134,133m Ce, nat La(p,x) 135,134,133 La and 133m,133g,131 Ba nuclear reactions have been measured experimentally, for the first time (except 139 Ce). Cross-sections in the 34-64 MeV energy range were obtained through an activation method combining the stacked foil irradiation technique and gamma-ray spectrometry. The experimental cross sections were compared with the theoretical prediction in the TENDL-2014 and TENDL-2015, TALYS based libraries. Applications in the field of medical radionuclides production is discussed.