Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Tots els drets reservats
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/218459
Experimental and theoretical cross sections for 𝐾-shell ionization of 52Te, 73Ta, and 83Bi by electrons with energies up to 100 keV
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
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.
Matèries
Matèries (anglès)
Citació
Citació
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, Suelen f., GARCÍA-ALVAREZ, J.a., KOSKINAS, M.f., FERNÁNDEZ VAREA, José maría, 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_. 2019. Vol. 100, núm. 1-9. [consulta: 20 de gener de 2026]. ISSN: 2469-9926. [Disponible a: https://hdl.handle.net/2445/218459]