| Autor: |
May, M.J., Hansen, S.B., Beiersdorfer, P., Jordan, N.M., Scofield, J.H., Reed, K.J., Brown, G.V., Porter, F.S., Kelley, R.L., Kilbourne, C.A., Boyce, K.R. |
| Předmět: |
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| Zdroj: |
Canadian Journal of Physics; 2024, Vol. 102 Issue 3, p152-167, 16p |
| Abstrakt: |
We have experimentally determined the electron collisional excitation cross-sections for several 3d→4f and 3d→5f excitations in Ni- to Ge-like Au at energies of ∼ 0.4, 1, 2, and 3 keV above threshold energy, ET, for the 3d→4f excitations (ET ∼ 2.5 keV) and ∼ 0.2, 1, and 2 keV above threshold energy for the 3d→5f excitations (ET ∼ 3.3 keV). The cross-section measurements are possible by using the GSFC micro-calorimeter to record emission spectra from beam plasmas created in the Livermore EBIT-I electron beam ion trap. The cross-sections are experimentally determined from the ratio of the measured intensities of the collisionally excited lines to the intensities of the radiative recombination lines in monoenergetic electron distribution EBIT-I plasmas. The effects of polarization and Auger processes in the beam plasmas are accounted for in the cross-section determination. Experimentally determined cross-sections are compared with those from HULLAC, DWS, and FAC calculations. The measurements exhibit significant differences with the calculations of these excitation cross-sections. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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