Energy-dependent Ps-He momentum-transfer cross section at low energies

J. J. Engbrecht; M. J. Erickson; C. P. Johnson; A. J. Kolan; A. E. Legard; S. P. Lund; M. J. Nyflot; J. D. Paulsen

doi:10.1103/PhysRevA.77.012711

Energy-dependent Ps-He momentum-transfer cross section at low energies

J. J. Engbrecht, M. J. Erickson, C. P. Johnson, A. J. Kolan, A. E. Legard, S. P. Lund, M. J. Nyflot, J. D. Paulsen

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

20 Scopus citations

Abstract

Positronium (Ps)-He scattering presents one of the few opportunities for both theory and experiment to tackle the fundamental interactions of Ps with ordinary matter. Below the dissociation energy of 6.8 eV, experimental and theoretical work has struggled to find agreement on the strength of this interaction as measured by the momentum-transfer cross section (Ïm). Here, we present work utilizing the Doppler broadening technique with an age-momentum correlation apparatus. This work demonstrates a strong energy dependence for this cross section at energies below 1 eV and is consistent with previous experimental results.

Original language	English (US)
Article number	012711
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	77
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevA.77.012711
State	Published - Jan 17 2008
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.77.012711

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abstract = "Positronium (Ps)-He scattering presents one of the few opportunities for both theory and experiment to tackle the fundamental interactions of Ps with ordinary matter. Below the dissociation energy of 6.8 eV, experimental and theoretical work has struggled to find agreement on the strength of this interaction as measured by the momentum-transfer cross section ({\"I}m). Here, we present work utilizing the Doppler broadening technique with an age-momentum correlation apparatus. This work demonstrates a strong energy dependence for this cross section at energies below 1 eV and is consistent with previous experimental results.",

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AU - Engbrecht, J. J.

AU - Erickson, M. J.

AU - Johnson, C. P.

AU - Kolan, A. J.

AU - Legard, A. E.

AU - Lund, S. P.

AU - Nyflot, M. J.

AU - Paulsen, J. D.

PY - 2008/1/17

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N2 - Positronium (Ps)-He scattering presents one of the few opportunities for both theory and experiment to tackle the fundamental interactions of Ps with ordinary matter. Below the dissociation energy of 6.8 eV, experimental and theoretical work has struggled to find agreement on the strength of this interaction as measured by the momentum-transfer cross section (Ïm). Here, we present work utilizing the Doppler broadening technique with an age-momentum correlation apparatus. This work demonstrates a strong energy dependence for this cross section at energies below 1 eV and is consistent with previous experimental results.

AB - Positronium (Ps)-He scattering presents one of the few opportunities for both theory and experiment to tackle the fundamental interactions of Ps with ordinary matter. Below the dissociation energy of 6.8 eV, experimental and theoretical work has struggled to find agreement on the strength of this interaction as measured by the momentum-transfer cross section (Ïm). Here, we present work utilizing the Doppler broadening technique with an age-momentum correlation apparatus. This work demonstrates a strong energy dependence for this cross section at energies below 1 eV and is consistent with previous experimental results.

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Energy-dependent Ps-He momentum-transfer cross section at low energies

Abstract

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