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Positronium emission from MgO smoke nanocrystals

Gurung, L.; Alonso, A M; Babij, Tamara; Cooper, B. S.; Shluger, A. L.; Cassidy, D. B.


We report experiments in which positronium (Ps) atoms were created in a thick layer of MgO smoke powder deposited on a thin silicon nitride substrate. The experimental arrangement was such that a positron beam could be implanted directly into the top of the MgO layer or be transmitted through the substrate, allowing Ps to be produced within ≈100 nm or 30 μm of the powder-vacuum interface. The transverse kinetic energy of Ps atoms emitted into vacuum was measured via the Doppler broadening of...[Show more]

CollectionsANU Research Publications
Date published: 2019
Type: Journal article
Source: Journal of Physics B: Atomic, Molecular and Optical Physics
DOI: 10.1088/1361-6455/ab0f06
Access Rights: Open Access


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