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Stochastic variational method for elastic scattering

Zhang, Jun-Yi and Mitroy, Jim (2008). Stochastic variational method for elastic scattering. Physical Review A (Atomic, Molecular and Optical Physics),78(1):012703-1-012703-11.

Document type: Journal Article
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IRMA ID 79608405xPUB18
Title Stochastic variational method for elastic scattering
Author Zhang, Jun-Yi
Mitroy, Jim
Journal Name Physical Review A (Atomic, Molecular and Optical Physics)
Publication Date 2008
Volume Number 78
Issue Number 1
ISSN 1050-2947   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-47249148376
Start Page 012703-1
End Page 012703-11
Total Pages 11
Place of Publication College Park, United States
Publisher American Physical Society
Field of Research 0202 - Atomic, Molecular, Nuclear, Particle and Plasma Physics
0204 - Condensed Matter Physics
0205 - Optical Physics
HERDC Category C1 - Journal Article (DEST)
Abstract The stochastic variational method is used with a confining potential of the form V=lambdar12 to generate correlated basis sets capable of accurately describing low-energy elastic scattering. Stabilization concepts are then used to extract the phase shifts and other scattering observables. The method is applied to positron scattering from H and He, and Ps scattering from H and He. The results of the calculations are in uniformly good agreement with previous high quality calculations or with experiment. In particular, the scattering length for Ps-He scattering is found to be 1.566a0 while the zero-energy 1Zeff was 0.1157. The Ps-He s-wave phase shift is found to be incompatible with experimental momentum transfer cross sections obtained by the Doppler broadening technique.
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Additional Notes Copyright by the American Physical Society

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