Simulation of Positronium [electronic resource] : Toward More Realistic Models of Void Spaces in Materials

Published:: Washington, D.C. : United States. Dept. of Energy, 2005.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: PDF-file: 15 pages; size: 0.2 Mbytes
Additional Creators:: Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

An exact treatment of the positron and electron in a two-chain, Path Integral Monte Carlo (PIMC) simulation is used to calculate both self-annihilation and pickoff rates at finite temperature. It has already been demonstrated that this technique can reproduce and extend results of simple theories of positrons and positronium (Ps) in spherical voids. Here, we include the effect of the linear dielectric response of a homogeneous material on the annihilation rate of positrons and Ps. In addition, we find lifetimes and structural information for Ps in cylindrical channels, both with and without adsorbed fluid atoms.

Report Numbers:

E 1.99:ucrl-conf-214749
ucrl-conf-214749

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Note:

Published through SciTech Connect.
08/18/2005.
"ucrl-conf-214749"
Presented at: 8th International Workshop on Positron and Positronium Chemistry (PPC8), Coimbra, Portugal, Sep 04 - Sep 09, 2005.
Cronin, T; Sterne, P; Bug, A; Wolfson, Z.

Funding Information:

W-7405-ENG-48

View MARC record | catkey: 14759646