Barros, Suelen F.Vanin, V.R.Mangiarotti, A.Maidana, N.L.Fernández Varea, José María2025-02-032025-02-032019-01-012469-9926https://hdl.handle.net/2445/218457The alignment parameter A20 of 73Ta, 74W, and 79Au ions after L3 subshell ionization by electron impact has been determined experimentally and theoretically in the wide energy range (1.02-10.2)EL3, where EL3 is the L3 ionization threshold. The A20 values have been deduced from measurements of the Ll (L3 → M1), Lα2 (L3 → M4), and Lα1 (L3 → M5) x-ray angular distributions using thin targets. The beam energies have been selected above the threshold energy of each L subshell in order to also investigate the influence of the Coster-Kronig transitions on the anisotropy of x-ray emission. The results provide a clear indication of alignment and agree with calculations carried out within the plane-wave Born approximation up to about 6EL3 , but an unpredicted inversion in the sign of A20 is observed above this energy.14 p.application/pdfeng(c) American Physical Society, 2019ElectronsEnergiaIonitzacióElectronesEnergyIonizationinfo:eu-repo/semantics/article6981362025-02-03info:eu-repo/semantics/openAccess