ORCID

J. D. Paulsen: 0000-0001-6048-456X

Document Type

Article

Date

2008

Keywords

doppler effect, helium, momentum, transfer functions, atomic physics

Language

English

Disciplines

Physics

Description/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.

Official Citation

Energy-dependent Ps-He momentum-transfer cross section at low energies. JJ Engbrecht, MJ Erickson, CP Johnson, AJ Kolan, AE Legard, SP Lund, MJ Nyflot, & JD Paulsen, Physical Review A 77, 012711 (2008).

ISSN

10502947

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Included in

Physics Commons

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