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Elastic positron-cadmium scattering at low energies

Bromley, Michael W. J. and Mitroy, Jim (2010). Elastic positron-cadmium scattering at low energies. Physical Review A (Atomic, Molecular and Optical Physics),81(5):052708-1-052708-7.

Document type: Journal Article
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IRMA ID 81704288xPUB9
Title Elastic positron-cadmium scattering at low energies
Author Bromley, Michael W. J.
Mitroy, Jim
Journal Name Physical Review A (Atomic, Molecular and Optical Physics)
Publication Date 2010
Volume Number 81
Issue Number 5
ISSN 1050-2947   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-77953167333
Start Page 052708-1
End Page 052708-7
Total Pages 7
Place of Publication College Park, United States
Publisher American Physical Society
HERDC Category A1 - Book (DIISR)
Abstract The elastic and annihilation cross sections for positron-cadmium scattering are reported up to the positronium-formation threshold (at 2.2 eV). The low-energy phase shifts for the elastic scattering of positrons from cadmium were derived from the bound and pseudostate energies of a very large basis configuration-interaction calculation of the e+-Cd system. The s-wave binding energy is estimated to be 126±42 meV, with a scattering length of Ascat=(14.2±2.1)a0, while the threshold annihilation parameter, Zeff, was 93.9±26.5. The p-wave phase shift exhibits a weak shape resonance that results in a peak Zeff of 91±17 at a collision energy of about 490±50 meV.
DOI http://dx.doi.org/10.1103/PhysRevA.81.052708   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
Additional Notes Copyright by the American Physical Society


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