Experimental and theoretical cross sections for K-shell ionization of 52Te, 73Ta, and 83Bi by electrons with energies up to 100 keV
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Physical Review A
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In this work we present a combined experimental and theoretical study of K-shell ionization by electrons
with energies close to the threshold. The ionization cross sections of the K shells of Te, Ta, and Bi atoms have
been measured up to 100 keV with uncertainties ranging from 4% to 8%. In turn, calculations have been done
using the subconfiguration average distorted-wave (SCADW) method, which includes the full two-body retarded
electromagnetic interaction between the projectile and target electrons. The predictions of the SCADW method
are in good agreement with the experimental data. In contrast, theoretical cross sections based on first-order
perturbation theory where the transverse interaction is computed with plane waves instead of distorted waves
underestimate the SCADW values as well as the experimental data. The difference between the two investigated
ab initio formalisms grows with atomic number, being 3% for Te, 15% for Ta, and 25% for Bi. An additional
comparison of both theoretical approaches with recent measurements for Au K supports the conclusion that the
SCADW method reproduces well the experimental K-shell ionization cross section of atoms with intermediate
to large Z near the threshold.
Como referenciar
SANTOS, O.C.B.; VANIN, V.R.; MAIDANA, N.L.; MARTINS, M.N.; TABACNIKS, M.H.; RODRIGUES, C.L.; SILVA, T.F.; SANTOS, A.D.; BARROS, S.F.; GARCIA-ALVAREZ, J.A.; KOSKINAS, M.F.; FERNANDEZ-VAREA, J.M.; PINDZOLA, M.S. Experimental and theoretical cross sections for K-shell ionization of 52Te, 73Ta, and 83Bi by electrons with energies up to 100 keV. Physical Review A, v. 100, n. 2, p. 022703-1 - 022703-9, 2019. DOI: 10.1103/PhysRevA.100.022703. Disponível em: http://repositorio.ipen.br/handle/123456789/30429. Acesso em: 30 Dec 2025.
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