L-subshell ionization of some rare earth elements by<sup>7</sup><sub>3</sub>Li ion impact

Lshell x-ray production cross sections by 0.5 to 5.0 MeV He" and 5.5 to S.0 MeV He" ionsarereportedForelementswithx-raysbetweenO.~O keV and 1.19 keV.Thintargets ofZFe, rsNi, & I , ,@Zn, ,,Ga and ,>Ge were manufactured using a cleaning process that reduced the level of light element impurities. The x-rays were measured with a windowless Si(Li) detector, whose efficiency was determined by the atomic-field bremsstrahlungmethod.The data are compared to the predictions of the first-order Born and the ECPSSR theories using the single-and multiple-hole fluorescence yields. The ECPSSR theory is clearly superior to the first-order Born approximation, although the data fall-when single-hole fluorescence yields are u s e d -m the average about S0/~below the ECFSSR. At the lowestvelocity, however, on the average this theory underestimates our measurements by 15% when single-hole fluorescence yields are employed. When multiple-hole fluorescence yields are used, the theory is within 3% of the averaged data at the lowest ion velocity. Coupled-state calculations that acsount for intrashell transitions and recently proposed modifications to the ECPSSR treatment of the binding effect give larger cross sections than the ECPSSR and hencewhen multiple-hole fluorescence yields are used-they are in larger disagreement with our measurements. The measured cross sections are shown to agree reasonably well with the results of our previous investigations, except for very substantial discrepancies at the lowest ion energies. We attribute these diferences to systematic errors in our previous experiments due to the Be window of the Si(Li) detector that resulted in a particularly small signal-tobackground ratio. t LINK Analytical Limited,

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L-subshell ionization of some rare earth elements by⁷₃Li ion impact

Cited by 4 publications

References 30 publications

L-shell X-ray production cross sections of selected lanthanoids by impact of 7Li2+ ions with energies between 3.50MeV and 5.25MeV

L-shell X-ray production cross sections of selected lanthanoids by impact of 7Li2+ ions with energies between 3.50MeV and 5.25MeV

L-shell x-ray production cross sections induced by heavy ion impact: Searching for a universal curve

L-shell X-ray production cross sections in₂₆Fe,₂₈Ni,₂₉Cu,₃₀Zn,₃₁Ga and₃₂Ge by 0.5 to 8.0 MeV He ions

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L-subshell ionization of some rare earth elements by73Li ion impact

Cited by 4 publications

References 30 publications

L-shell X-ray production cross sections of selected lanthanoids by impact of 7Li2+ ions with energies between 3.50MeV and 5.25MeV

L-shell X-ray production cross sections of selected lanthanoids by impact of 7Li2+ ions with energies between 3.50MeV and 5.25MeV

L-shell x-ray production cross sections induced by heavy ion impact: Searching for a universal curve

L-shell X-ray production cross sections in26Fe,28Ni,29Cu,30Zn,31Ga and32Ge by 0.5 to 8.0 MeV He ions

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Product

Resources

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L-subshell ionization of some rare earth elements by⁷₃Li ion impact

L-shell X-ray production cross sections in₂₆Fe,₂₈Ni,₂₉Cu,₃₀Zn,₃₁Ga and₃₂Ge by 0.5 to 8.0 MeV He ions