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Dependence of orthopositronium annihilation rates on density fluctuations in methane gas

Journal Article · · J. Chem. Phys.; (United States)
DOI:https://doi.org/10.1063/1.435502· OSTI ID:5330410
;
Recent experiments have shown that the annihilation rate of positrons which form orthopositronium in methane gas varies linearly with gas density at low densities, but significantly deviates from linearity at high densities. We present evidence that this annihilation behavior in methane results from density fluctuations that are characteristic of an imperfect gas.
Research Organization:
The University of Texas at Arlington, Arlington, Texas 76019
OSTI ID:
5330410
Journal Information:
J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 68:1; ISSN JCPSA
Country of Publication:
United States
Language:
English

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Related Subjects

640303* -- Atomic
Molecular & Chemical Physics-- Positronium
Muonium
& Muonic & Mesic Atoms & Molecules
74 ATOMIC AND MOLECULAR PHYSICS
ALKANES
ANNIHILATION
BASIC INTERACTIONS
CRYOGENIC FLUIDS
DENSITY
ELECTROMAGNETIC INTERACTIONS
FLUCTUATIONS
FLUIDS
HYDROCARBONS
INTERACTIONS
METHANE
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
POSITRONIUM
VARIATIONS