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Expectation values of the e+He(Se3) system

Mitroy, Jim (2005). Expectation values of the e+He(Se3) system. Physical Review A (Atomic, Molecular and Optical Physics),72(3):32503-1-32501-6.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 11 times in Scopus Article | Citations

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IRMA ID 80791673xPUB77
Title Expectation values of the e+He(Se3) system
Author Mitroy, Jim
Journal Name Physical Review A (Atomic, Molecular and Optical Physics)
Publication Date 2005
Volume Number 72
Issue Number 3
ISSN 1094-1622   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-28844493118
Start Page 32503-1
End Page 32501-6
Total Pages 6
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 Close to converged energies and expectation values for e+He(3Se) are computed using a ground state wave function consisting of 1500 explicitly correlated Gaussians. The best estimate of the e+He(3Se) energy was –2.250 595 08 hartree, which has a binding energy of 0.000 595 08 hartree against dissociation into Ps+He+. The 2gamma annihilation rate for the spin doublet state was 5.713×109 s–1. The estimated annihilation rate with the core He+ electron was 2.506×106 s–1. The derived enhancement factor for annihilation with the He+(1s) core was 2.29, just over 10% smaller than the enhancement factor derived from analyses of annihilation during e+-He+ scattering. The diffuse nature of the wave function, with well separated He+ and Ps subsystems, is demonstarted to be on the threshold of satisfying the formal criteria that define a quantum halo state.
DOI http://dx.doi.org/10.1103/PhysRevA.72.032503   (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 The American Physical Society


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