High-resolution positron scattering from helium: Grand total and positronium-formation cross sections

P. Caradonna; A. Jones; C. Makochekanwa; D. S. Slaughter; J. P. Sullivan; S. J. Buckman; I. Bray; D. V. Fursa

doi:10.1103/PhysRevA.80.032710

High-resolution positron scattering from helium: Grand total and positronium-formation cross sections

P. Caradonna^*, A. Jones, C. Makochekanwa, D. S. Slaughter, J. P. Sullivan, S. J. Buckman, I. Bray, D. V. Fursa

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

Abstract

Measurements of the grand total and positronium-formation cross sections for positrons scattered by helium within the impact energy range from 10 to 60 eV are presented. All measurements presented here use a high-resolution (∼70□meV) trap-based pulsed positron beam. Scattering is studied using a high-magnetic field, and absolute measurements of the scattering cross sections are obtained without the need for normalization to other cross sections. We also present single center, convergent close coupling calculations of the total cross section. A detailed study of the cross section to investigate the possibility of scattering resonances and channel coupling has been made. Comparisons with previous cross-section measurements and theoretical calculations are also included.

Original language	English
Article number	032710
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	80
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevA.80.032710
Publication status	Published - 22 Sept 2009

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title = "High-resolution positron scattering from helium: Grand total and positronium-formation cross sections",

abstract = "Measurements of the grand total and positronium-formation cross sections for positrons scattered by helium within the impact energy range from 10 to 60 eV are presented. All measurements presented here use a high-resolution (∼70□meV) trap-based pulsed positron beam. Scattering is studied using a high-magnetic field, and absolute measurements of the scattering cross sections are obtained without the need for normalization to other cross sections. We also present single center, convergent close coupling calculations of the total cross section. A detailed study of the cross section to investigate the possibility of scattering resonances and channel coupling has been made. Comparisons with previous cross-section measurements and theoretical calculations are also included.",

author = "P. Caradonna and A. Jones and C. Makochekanwa and Slaughter, {D. S.} and Sullivan, {J. P.} and Buckman, {S. J.} and I. Bray and Fursa, {D. V.}",

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T2 - Grand total and positronium-formation cross sections

AU - Caradonna, P.

AU - Jones, A.

AU - Makochekanwa, C.

AU - Slaughter, D. S.

AU - Sullivan, J. P.

AU - Buckman, S. J.

AU - Bray, I.

AU - Fursa, D. V.

PY - 2009/9/22

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N2 - Measurements of the grand total and positronium-formation cross sections for positrons scattered by helium within the impact energy range from 10 to 60 eV are presented. All measurements presented here use a high-resolution (∼70□meV) trap-based pulsed positron beam. Scattering is studied using a high-magnetic field, and absolute measurements of the scattering cross sections are obtained without the need for normalization to other cross sections. We also present single center, convergent close coupling calculations of the total cross section. A detailed study of the cross section to investigate the possibility of scattering resonances and channel coupling has been made. Comparisons with previous cross-section measurements and theoretical calculations are also included.

AB - Measurements of the grand total and positronium-formation cross sections for positrons scattered by helium within the impact energy range from 10 to 60 eV are presented. All measurements presented here use a high-resolution (∼70□meV) trap-based pulsed positron beam. Scattering is studied using a high-magnetic field, and absolute measurements of the scattering cross sections are obtained without the need for normalization to other cross sections. We also present single center, convergent close coupling calculations of the total cross section. A detailed study of the cross section to investigate the possibility of scattering resonances and channel coupling has been made. Comparisons with previous cross-section measurements and theoretical calculations are also included.

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DO - 10.1103/PhysRevA.80.032710

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JF - Physical Review A - Atomic, Molecular, and Optical Physics

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ER -

High-resolution positron scattering from helium: Grand total and positronium-formation cross sections

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