Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
Ab initio scattering calculation in three-body Coulomb systems: e+-H, e--H and e+-He+. / Gradusov, V. A. ; Roudnev, V. A. ; Yarevsky, E. A. ; Yakovlev, S. L. .
Nuclear Theory in the Supercomputing Era – 2018 (NTSE-2018): International Conference. Proceedings. ed. / A.M. Shirokov; A.I. Mazur. Khabarovsk : Тихоокеанский государственный университет , 2019. p. 137-149.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
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TY - GEN
T1 - Ab initio scattering calculation in three-body Coulomb systems: e+-H, e--H and e+-He+
AU - Gradusov, V. A.
AU - Roudnev, V. A.
AU - Yarevsky, E. A.
AU - Yakovlev, S. L.
PY - 2019
Y1 - 2019
N2 - We present the results of our detailed calculations of scattering characteristics in e −e +p¯ (e −e +p) and e +e −He++ systems with zero total orbital momentum by direct solving the Faddeev–Merkuriev equations in the differential form. We calculate all possible cross-sections in the low-energy region which admits up to seven open channels including the rearrangement channels of ground and excited states of antihydrogen, positronium and helium ion formations. All sharp resonances of the systems obtained and approved previously by a number of authors are clearly reproduced in the calculated cross sections. Alternatively, the exterior complex scaling approach has been used for calculating resonant energies. It confirmed the existence of reported by other authors broad resonances in the e +e −He++ system. Prominent oscillations of Gailitis–Damburg type have been found in cross sections for energies above the threshold corresponding to n = 2 state of antihydrogen.
AB - We present the results of our detailed calculations of scattering characteristics in e −e +p¯ (e −e +p) and e +e −He++ systems with zero total orbital momentum by direct solving the Faddeev–Merkuriev equations in the differential form. We calculate all possible cross-sections in the low-energy region which admits up to seven open channels including the rearrangement channels of ground and excited states of antihydrogen, positronium and helium ion formations. All sharp resonances of the systems obtained and approved previously by a number of authors are clearly reproduced in the calculated cross sections. Alternatively, the exterior complex scaling approach has been used for calculating resonant energies. It confirmed the existence of reported by other authors broad resonances in the e +e −He++ system. Prominent oscillations of Gailitis–Damburg type have been found in cross sections for energies above the threshold corresponding to n = 2 state of antihydrogen.
KW - Faddeev–Merkuriev equations
KW - positron scattering
KW - antihydrogen formation
KW - Gailitis–Damburg oscillations
M3 - Conference contribution
SP - 137
EP - 149
BT - Nuclear Theory in the Supercomputing Era – 2018 (NTSE-2018)
A2 - Shirokov, A.M.
A2 - Mazur, A.I.
PB - Тихоокеанский государственный университет
CY - Khabarovsk
T2 - Nuclear Theory in the Supercomputing Era -2018
Y2 - 29 October 2018 through 2 November 2018
ER -
ID: 52454416