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Resonant Annihilation and Positron Bound States in Benzene

Autor: S. Ghosh, J. R. Danielson, C. M. Surko

Publikováno v: Physical review letters. 129(12)

Positrons attach to molecules in vibrationally resonant two-body collisions that result in greatly enhanced annihilation rates. Measurements of annihilation as a function of positron energy are presented for benzene using a cryogenic, trap-based beam

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9947bf2496c693006996e2ece317ab9
https://pubmed.ncbi.nlm.nih.gov/36179198

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Inviscid damping of an elliptical vortex subject to an external strain flow

Autor: P. Wongwaitayakornkul, J. R. Danielson, N. C. Hurst, D. H. E. Dubin, C. M. Surko

Publikováno v: Physics of Plasmas. 29

Inviscid spatial Landau damping is studied experimentally for the case of oscillatory motion of a two-dimensional vortex about its elliptical equilibrium in the presence of an applied strain flow. The experiments are performed using electron plasmas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1e1a7809f2e4a250b372e311ad652482
https://doi.org/10.1063/5.0086227

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Effect of chlorination on positron binding to hydrocarbons: Experiment and theory

Autor: J. R. Danielson, M. R. Natisin, A. R. Swann, C. M. Surko, Soumen Ghosh, Gleb Gribakin

Publikováno v: Swann, A R, Gribakin, G F, Danielson, J R, Ghosh, S, Natisin, M R & Surko, C 2021, ' Effect of chlorination on positron binding to hydrocarbons: Experiment and theory ', Physical Review A (Atomic, Molecular, and Optical Physics), vol. 104, no. 1, 012813 . https://doi.org/10.1103/PhysRevA.104.012813

Measured and calculated positron binding energies are presented for a range of hydrocarbons with up to six carbon atoms (viz., methane, acetylene, ethylene, ethane, propane, butane, and hexane) and their chlorinated counterparts. Both experiment and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bcb903a342876778e3c2647877310562
https://pure.qub.ac.uk/en/publications/effect-of-chlorination-on-positron-binding-to-hydrocarbons-experiment-and-theory(99f846ef-4fda-493d-bacc-fd6f4f29cc11).html

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A new frontier in laboratory physics: magnetized electron–positron plasmas

Publikováno v: Journal of Plasma Physics

We describe here efforts to create and study magnetized electron–positron pair plasmas, the existence of which in astrophysical environments is well-established. Laboratory incarnations of such systems are becoming ever more possible due to novel a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da2d42c0e0719ab16857a0b2b09fd2c7
https://doi.org/10.1017/s0022377820001385

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Experimental study of the stability and dynamics of a two-dimensional ideal vortex under external strain

Autor: J. R. Danielson, C. M. Surko, N. C. Hurst, Daniel H. E. Dubin

Publikováno v: Journal of Fluid Mechanics. 848:256-287

The dynamics of two-dimensional (2-D) ideal fluid vortices is studied experimentally in the presence of an irrotational strain flow. Laboratory experiments are conducted using strongly magnetized pure electron plasmas, a technique which is made possi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c49f16e517008127056cde7c476b6e1c
https://doi.org/10.1017/jfm.2018.311

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Instability of an electron-plasma shear layer in an externally imposed strain flow

Autor: N. C. Hurst, J. R. Danielson, Daniel H. E. Dubin, C. M. Surko

Publikováno v: Physics of Plasmas. 27:042101

The E × B shear instability of a two-dimensional (2D) filament (i.e., a thin, rectangular strip perpendicular to the magnetic field) of magnetized pure electron plasma is investigated experimentally in the presence of an externally imposed strain fl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e2555b69aadeb378428ca90c02d68ba1
https://doi.org/10.1063/1.5138924

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