Ion-atom excitation at high and intermediate energies

Exact post and prior impulse approximation cross sections are calculated for the excitation process H++H (1s to n=2). The results show a large post-prior discrepancy and a huge disagreement with the experiments, even at energies where the simple Born approximation already works. Following a previous...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Rodriguez, V.D., Miraglia, J.E.
Formato: JOUR
Materias:
Cross section
Eikonal
Excitation cross section
Excitation process
High energy
Impulse approximation
Intermediate energies
Ion-atom
Projectile charge
Born approximation
Experiments
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09534075_v23_n20_p3629_Rodriguez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_09534075_v23_n20_p3629_Rodriguez
record_format dspace
spelling todo:paper_09534075_v23_n20_p3629_Rodriguez2023-10-03T15:50:51Z Ion-atom excitation at high and intermediate energies Rodriguez, V.D. Miraglia, J.E. Cross section Eikonal Excitation cross section Excitation process High energy Impulse approximation Intermediate energies Ion-atom Projectile charge Born approximation Experiments Exact post and prior impulse approximation cross sections are calculated for the excitation process H++H (1s to n=2). The results show a large post-prior discrepancy and a huge disagreement with the experiments, even at energies where the simple Born approximation already works. Following a previous work along this line, the authors show that the theory remarkably improves when the correct asymptotic conditions are observed by including eikonal phases. This new approximation, called the eikonal impulse approximation, presents a negligible prior-post discrepancy at high energies and the prior version produces very good agreement with the experiments. Departure of the total excitation cross section from the quadratic law on the projectile charge (saturation) is discussed and compared with the available data. Scaling laws, alignment factors and s-p coherences are reported and compared with previous results. © 1990, 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_09534075_v23_n20_p3629_Rodriguez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cross section
Eikonal
Excitation cross section
Excitation process
High energy
Impulse approximation
Intermediate energies
Ion-atom
Projectile charge
Born approximation
Experiments
spellingShingle Cross section
Eikonal
Excitation cross section
Excitation process
High energy
Impulse approximation
Intermediate energies
Ion-atom
Projectile charge
Born approximation
Experiments
Rodriguez, V.D.
Miraglia, J.E.
Ion-atom excitation at high and intermediate energies
topic_facet Cross section
Eikonal
Excitation cross section
Excitation process
High energy
Impulse approximation
Intermediate energies
Ion-atom
Projectile charge
Born approximation
Experiments
description Exact post and prior impulse approximation cross sections are calculated for the excitation process H++H (1s to n=2). The results show a large post-prior discrepancy and a huge disagreement with the experiments, even at energies where the simple Born approximation already works. Following a previous work along this line, the authors show that the theory remarkably improves when the correct asymptotic conditions are observed by including eikonal phases. This new approximation, called the eikonal impulse approximation, presents a negligible prior-post discrepancy at high energies and the prior version produces very good agreement with the experiments. Departure of the total excitation cross section from the quadratic law on the projectile charge (saturation) is discussed and compared with the available data. Scaling laws, alignment factors and s-p coherences are reported and compared with previous results. © 1990, IOP Publishing Ltd.
format JOUR
author Rodriguez, V.D.
Miraglia, J.E.
author_facet Rodriguez, V.D.
Miraglia, J.E.
author_sort Rodriguez, V.D.
title Ion-atom excitation at high and intermediate energies
title_short Ion-atom excitation at high and intermediate energies
title_full Ion-atom excitation at high and intermediate energies
title_fullStr Ion-atom excitation at high and intermediate energies
title_full_unstemmed Ion-atom excitation at high and intermediate energies
title_sort ion-atom excitation at high and intermediate energies
url http://hdl.handle.net/20.500.12110/paper_09534075_v23_n20_p3629_Rodriguez
work_keys_str_mv AT rodriguezvd ionatomexcitationathighandintermediateenergies
AT miragliaje ionatomexcitationathighandintermediateenergies
_version_ 1807315749324193792

Ejemplares similares