Threshold behavior of the Jost function for the atomic polarization potential

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We evaluate the [Formula Presented]-wave Jost function for the polarization potential and calculate its effective range expansion for [Formula Presented] up to the order [Formula Presented] We investigate not only the phase but also the modulus of the Jost function, generalizing previous works for t...

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Autores principales: Macri, P.A., Barrachina, R.O.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_10502947_v65_n6_p7_Macri
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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_10502947_v65_n6_p7_Macri2023-10-03T15:59:23Z Threshold behavior of the Jost function for the atomic polarization potential Macri, P.A. Barrachina, R.O. We evaluate the [Formula Presented]-wave Jost function for the polarization potential and calculate its effective range expansion for [Formula Presented] up to the order [Formula Presented] We investigate not only the phase but also the modulus of the Jost function, generalizing previous works for the expansion up to the order [Formula Presented] of the s-wave phase shift. We discuss the validity domain of this generalized expansion for the interaction of an electron with a Helium atom in any of its three long-lived He states, i.e., [Formula Presented] [Formula Presented] and [Formula Presented] Even though this expansion is shown to be appropriate for most of the applications in electron-atom collisions, we propose here a more precise and simpler approach that provides much better results in a broader energy range when comparing with elaborated ab initio calculations. © 2002 The American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10502947_v65_n6_p7_Macri
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We evaluate the [Formula Presented]-wave Jost function for the polarization potential and calculate its effective range expansion for [Formula Presented] up to the order [Formula Presented] We investigate not only the phase but also the modulus of the Jost function, generalizing previous works for the expansion up to the order [Formula Presented] of the s-wave phase shift. We discuss the validity domain of this generalized expansion for the interaction of an electron with a Helium atom in any of its three long-lived He states, i.e., [Formula Presented] [Formula Presented] and [Formula Presented] Even though this expansion is shown to be appropriate for most of the applications in electron-atom collisions, we propose here a more precise and simpler approach that provides much better results in a broader energy range when comparing with elaborated ab initio calculations. © 2002 The American Physical Society.
format JOUR
author Macri, P.A.
Barrachina, R.O.
spellingShingle Macri, P.A.
Barrachina, R.O.
Threshold behavior of the Jost function for the atomic polarization potential
author_facet Macri, P.A.
Barrachina, R.O.
author_sort Macri, P.A.
title Threshold behavior of the Jost function for the atomic polarization potential
title_short Threshold behavior of the Jost function for the atomic polarization potential
title_full Threshold behavior of the Jost function for the atomic polarization potential
title_fullStr Threshold behavior of the Jost function for the atomic polarization potential
title_full_unstemmed Threshold behavior of the Jost function for the atomic polarization potential
title_sort threshold behavior of the jost function for the atomic polarization potential
url http://hdl.handle.net/20.500.12110/paper_10502947_v65_n6_p7_Macri
work_keys_str_mv AT macripa thresholdbehaviorofthejostfunctionfortheatomicpolarizationpotential
AT barrachinaro thresholdbehaviorofthejostfunctionfortheatomicpolarizationpotential
_version_ 1807321047980048384

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