Simulation of Positronium: Toward More Realistic Models of Void Spaces in Materials

Bug, A; Cronin, T; Sterne, P; Wolfson, Z

doi:10.1016/j.radphyschem.2006.03.043

Title: Simulation of Positronium: Toward More Realistic Models of Void Spaces in Materials

Conference · Thu Aug 18 00:00:00 EDT 2005

DOI:https://doi.org/10.1016/j.radphyschem.2006.03.043· OSTI ID:878620

Bug, A; Cronin, T; Sterne, P; Wolfson, Z

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.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: W-7405-ENG-48

OSTI ID:: 878620

Report Number(s):: UCRL-CONF-214749; TRN: US200611%%366

Resource Relation:: Journal Volume: 76; Journal Issue: 2; Conference: Presented at: 8th International Workshop on Positron and Positronium Chemistry (PPC8), Coimbra, Portugal, Sep 04 - Sep 09, 2005

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
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Title: Simulation of Positronium: Toward More Realistic Models of Void Spaces in Materials

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