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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Atomic alignment of Ta-73, W-74, and Au-79 after L-3 subshell ionization by 10-100-keV electron impact

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Author(s):
Barros, Suelen F. [1, 2] ; Vanin, Vito R. [1] ; Mangiarotti, Alessio [1] ; Maidana, Nora L. [1] ; Fernandez-Varea, Jose M. [1, 3, 4]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Inst Fis, Rua Matao 1371, Cidade Univ, BR-05508090 Sao Paulo, SP - Brazil
[2] Inst Fed Sao Paulo, Rua Primeiro de Maio 500, BR-08571050 Itaquaquecetuba, SP - Brazil
[3] Univ Barcelona, Fac Fis FQA, Diagonal 645, ES-08028 Barcelona, Catalonia - Spain
[4] Univ Barcelona, ICC, Diagonal 645, ES-08028 Barcelona, Catalonia - Spain
Total Affiliations: 4
Document type: Journal article
Source: Physical Review A; v. 100, n. 6 DEC 10 2019.
Web of Science Citations: 0
Abstract

The alignment parameter A(20) of Ta-73, (7)4W, and Au-79 ions after L-3 subshell ionization by electron impact has been determined experimentally and theoretically in the wide energy range (1.02-10.2)E-L3, where E-L3 is the L-3 ionization threshold. The A(20) values have been deduced from measurements of the Ll (L-3 -> M-1), L alpha(2) (L-3 -> M-4), and L alpha(1) (L-3 -> M-5) 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 6E(L3), but an unpredicted inversion in the sign of A(20) is observed above this energy. (AU)

FAPESP's process: 13/24803-5 - Measurement of the atomic alignment by electron impact from L x-rays angular distribution
Grantee:Suelen Fernandes de Barros
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 16/13116-5 - Systematic measurements of electron and proton multiple scattering with energies up to 5 MEV
Grantee:Alessio Mangiarotti
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 15/14530-7 - Inner shell atomic ionization by impact of electrons with energy between 10 keV and 5 MeV in the São Paulo Microtron
Grantee:Vito Roberto Vanin
Support type: Regular Research Grants