Three-particle one-dimensional collision model-i. excitation

The present work examines one-dimensional collisions of three pseudo particles simulating a projectile and a target heavy nuclei, and an active electron. Square-well potentials are considered, and no internuclear interaction is taken into account. The aim is to develop a bench mark for testing theor...

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Autores principales: RodrÍ guez, V.D., Gravielle, M.S., Miraglia, J.E.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00318949_v43_n1_p52_RodrIguez
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00318949_v43_n1_p52_RodrIguez2023-10-03T14:41:49Z Three-particle one-dimensional collision model-i. excitation RodrÍ guez, V.D. Gravielle, M.S. Miraglia, J.E. The present work examines one-dimensional collisions of three pseudo particles simulating a projectile and a target heavy nuclei, and an active electron. Square-well potentials are considered, and no internuclear interaction is taken into account. The aim is to develop a bench mark for testing theoretical methods. Direct excitation is studied in terms of the velocity and strength of the projectile. We evaluate fourteen theoretical methods currently used in atomic collisions, namely: four exact second order Born approximations based on different Green functions, two Schwinger fractional expressions, and seven distorted wave methods. We also present the exact results obtained with the finite-difference numerical technique, and comparisons are made. The distorted waves, in particular the exact impulse approximation and related one, prove to be better methods to cope with very strong perturbations. © 1991 IOP Publishing Ltd. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00318949_v43_n1_p52_RodrIguez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The present work examines one-dimensional collisions of three pseudo particles simulating a projectile and a target heavy nuclei, and an active electron. Square-well potentials are considered, and no internuclear interaction is taken into account. The aim is to develop a bench mark for testing theoretical methods. Direct excitation is studied in terms of the velocity and strength of the projectile. We evaluate fourteen theoretical methods currently used in atomic collisions, namely: four exact second order Born approximations based on different Green functions, two Schwinger fractional expressions, and seven distorted wave methods. We also present the exact results obtained with the finite-difference numerical technique, and comparisons are made. The distorted waves, in particular the exact impulse approximation and related one, prove to be better methods to cope with very strong perturbations. © 1991 IOP Publishing Ltd.
format JOUR
author RodrÍ guez, V.D.
Gravielle, M.S.
Miraglia, J.E.
spellingShingle RodrÍ guez, V.D.
Gravielle, M.S.
Miraglia, J.E.
Three-particle one-dimensional collision model-i. excitation
author_facet RodrÍ guez, V.D.
Gravielle, M.S.
Miraglia, J.E.
author_sort RodrÍ guez, V.D.
title Three-particle one-dimensional collision model-i. excitation
title_short Three-particle one-dimensional collision model-i. excitation
title_full Three-particle one-dimensional collision model-i. excitation
title_fullStr Three-particle one-dimensional collision model-i. excitation
title_full_unstemmed Three-particle one-dimensional collision model-i. excitation
title_sort three-particle one-dimensional collision model-i. excitation
url http://hdl.handle.net/20.500.12110/paper_00318949_v43_n1_p52_RodrIguez
work_keys_str_mv AT rodriguezvd threeparticleonedimensionalcollisionmodeliexcitation
AT graviellems threeparticleonedimensionalcollisionmodeliexcitation
AT miragliaje threeparticleonedimensionalcollisionmodeliexcitation
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