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The stability and structure of the (mz+,e-,e-,e+) system

Mitroy, Jim and Novikov, Sergey A. (2004). The stability and structure of the (mz+,e-,e-,e+) system. Physical Review A (Atomic, Molecular, and Optical Physics),70(3):032511-1-032511-9.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 11 times in Scopus Article | Citations

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Title The stability and structure of the (mz+,e-,e-,e+) system
Author Mitroy, Jim
Novikov, Sergey A.
Journal Name Physical Review A (Atomic, Molecular, and Optical Physics)
Publication Date 2004
Volume Number 70
Issue Number 3
ISSN 1094-1622   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-19644401193
Start Page 032511-1
End Page 032511-9
Total Pages 9
Place of Publication College Park, United Staes
Publisher The American Physical Society
Field of Research 0202 - Atomic, Molecular, Nuclear, Particle and Plasma Physics
0204 - Condensed Matter Physics
0205 - Optical Physics
HERDC Category C1 - Journal Article (DEST)
Abstract The stability and structure of the ( mZ+ , e- , e - , e+ ) system is studied as a function of the mass of the mZ+ particle and for Z=1 , 2, 3, and 10. The Z=1 system can be regarded as an analog of the APs system (where A is a group I or IB atom of the periodic table) and was found to be stable for all values of m+ . This is supportive of the idea that all the group I and IB atoms can bind Ps. The ( m2+ , e- , e- , e+ ) system is stable for all m2+ / me ⩽0.68 and evolves into a configuration best described as ( m2+ , Ps- ) when m2+ / me →0 . The ( m3+ , e- , e- , e+ ) system was stable for a mass range given by m3+ / me ⩽0.066 32 , which suggests that positrons could form Feshbach resonances in collisions with positive ions which are isolectronic with the group II and IIB columns of the periodic table. The ( m3+ , e- , e- , e+ ) system has the unusual property that it has a mass range where it becomes more compact while its binding energy simultaneously decreases. The ( m10+ , e- , e- , e+ ) system is also stable at m10+ / me =0.002 54 , which implies stability for all mass ratios less than 0.002 54. In total, the calculations suggest that the ( mZ+ , e- , e- , e+ ) system is stable whenever the mZ+ + Ps- or ( mZ+ , e- ) +Ps breakups represent the lowest energy dissociation channel. As part of the analysis some improved estimates of the properties of the KPs ground state are reported.
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Additional Notes Copyright by the The American Physical Society

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