MEASUREMENTS OF IONIZATION CROSS-SECTIONS OF TI AND CU INDUCED BY LOW-ENERGY LI AND B ION IMPACT

The measurements of K-shell ionization cross sections of Ti and Cu ind uced by Li and B impact in the energy range of 1.0 MeV < E-0 < 6.4 MeV are presented. The correction of the fluorescence yield due to the mu ltiple ionization is estimated. Extracted cross sections are compared to the predictions of different models: the ECPSSR theory and the SCA theory where quite a few approaches are used. The ECPSSR theory explai ns measured cross sections quite well. By including the correction of electron binding energy in the SCA theory in the same way as included in the ECPSSR theory the agreement between the measured and the SCA th eoretical cross sections is improved. (C) 1998 Elsevier Science B.V.