ON THE PROPERTIES OF OXIDIZED AND REDUCED COPPER SAMPLES USED FOR ELECTRON IRRADIATION EXPERIMENTS IN THE kHz-RANGE U. Gratzel, K. Lücke, G. Sokolowski et B. Wantzen J. Phys. Colloques, 44 C9 (1983) C9-533-C9-537 DOI: 10.1051/jphyscol:1983978