Cu K X-ray Emission by MeV Cluster Beam Bombardment

The MeV cluster beam of (C)⁺₂ ions has been bombarded on a copper target and K x-ray spectra of Cu have been measured with a Si(Li) detector. It is found that the K x-ray spectra of Cu induced by bombardment with 2.8 MeV (C)⁺₂ and 1.4 MeV C⁺ ions are almost the same. In contrast, K x-ray spectra of Cu induced by bombardment with 2.8 MeV (C)⁺₂ and 3.0 MeVSi⁺ ions are quite different. These interesting phenomena are discussed.