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Spin-orbit quenching of positronium during atomic collisions

Mitroy, Jim and Novikov, Sergey A. (2003). Spin-orbit quenching of positronium during atomic collisions. Physical Review Letters,90(18):183202-1-183202-4.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 18 times in Scopus Article | Citations

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Title Spin-orbit quenching of positronium during atomic collisions
Author Mitroy, Jim
Novikov, Sergey A.
Journal Name Physical Review Letters
Publication Date 2003
Volume Number 90
Issue Number 18
ISSN 0031-9007   (check CDU catalogue  open catalogue search in new window)
Scopus ID 2-s2.0-0038271891
Start Page 183202-1
End Page 183202-4
Total Pages 4
Place of Publication College Park, United States
Publisher American Physical Society
Field of Research MATHEMATICAL SCIENCES
PHYSICAL SCIENCES
ENGINEERING
HERDC Category C1 - Journal Article (DEST)
Abstract When positrons are injected into a gas, 75% of the positronium (Ps) is likely to be formed as long-lived ortho-Ps. The main decay mechanisms for the ortho-Ps have been assumed to be natural decay of ortho-Ps and pickoff annihilation of the positron during Ps-atom collisions. A third possibility for annihilation is ortho-Ps-->para-Ps conversion due to the spin-orbit interaction between the atom and colliding Ps. This extra quenching mechanism may explain a number of phenomena observed in the annihilation spectrum of Kr and Xe, including the very small Ps fraction of 3% seen for Xe.
Keywords gases
annihilation
scattering
DOI http://dx.doi.org/10.1103/PhysRevLett.90.183202   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
Additional Notes Copyright by the The American Physical Society


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