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Effects of autoionization in electron loss from heliumlike highly charged ions in fast collisions with atomic particles. / Lyashchenko, K. N.; Andreev, O. Yu; Voitkiv, A. B.
в: Physical Review A, Том 96, № 5, 052702, 08.11.2017.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Effects of autoionization in electron loss from heliumlike highly charged ions in fast collisions with atomic particles
AU - Lyashchenko, K. N.
AU - Andreev, O. Yu
AU - Voitkiv, A. B.
PY - 2017/11/8
Y1 - 2017/11/8
N2 - We study theoretically single-electron loss from the ground state of a heliumlike highly charged ion in fast collisions with an atomic particle (a nucleus or an atom), focusing on electron emission energies where the so-called excitation-autoionization channel of electron loss becomes of importance. The presence of this channel leads to the appearance of sharp structures in the energy distribution of the emitted electrons and may also noticeably influence the angular distributions of the emission in the vicinity of autoionization resonances. We performed calculations for electron loss from Ca18+(1s2) and Zn28+(1s2) in 100 MeV/u collisions with neon. It is shown that two qualitatively different subchannels (which involve either one or two interactions between the electrons of the ion and the incident atomic particle) substantially contribute to excitation-autoionization and take active part in the interference with the direct channel of electron loss; however, they practically do not interfere with each other. Our consideration also shows that the account of QED corrections is important for an accurate description of electron loss even from relatively light heliumlike HCIs.
AB - We study theoretically single-electron loss from the ground state of a heliumlike highly charged ion in fast collisions with an atomic particle (a nucleus or an atom), focusing on electron emission energies where the so-called excitation-autoionization channel of electron loss becomes of importance. The presence of this channel leads to the appearance of sharp structures in the energy distribution of the emitted electrons and may also noticeably influence the angular distributions of the emission in the vicinity of autoionization resonances. We performed calculations for electron loss from Ca18+(1s2) and Zn28+(1s2) in 100 MeV/u collisions with neon. It is shown that two qualitatively different subchannels (which involve either one or two interactions between the electrons of the ion and the incident atomic particle) substantially contribute to excitation-autoionization and take active part in the interference with the direct channel of electron loss; however, they practically do not interfere with each other. Our consideration also shows that the account of QED corrections is important for an accurate description of electron loss even from relatively light heliumlike HCIs.
UR - http://www.scopus.com/inward/record.url?scp=85033717963&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.96.052702
DO - 10.1103/PhysRevA.96.052702
M3 - Article
AN - SCOPUS:85033717963
VL - 96
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 5
M1 - 052702
ER -
ID: 28526992