Investigations of positronium formation and destruction using PsARS

A new method of spectroscopy PsARS (positronium annihilation ratio spectroscopy) has been developed where ratios are determined of detected coincidence signals resulting from the three γ-ray decay of ortho-Ps to coincidence signals from the two γ decay of para-Ps and conversion of ortho-Ps into two...

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Published inNuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 247; no. 1; pp. 117 - 122
Main Authors Kauppila, W.E., Edwards, J.J., Miller, E.G., Stein, T.S., Surdutovich, E.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.06.2006
Subjects
Atoms
Molecules
Positronium
Positrons
Spectroscopy
Molecules
Spectroscopy
36.10.Dr
39.30.+w
Positrons
Atoms
Positronium
34.85.+x
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Summary:A new method of spectroscopy PsARS (positronium annihilation ratio spectroscopy) has been developed where ratios are determined of detected coincidence signals resulting from the three γ-ray decay of ortho-Ps to coincidence signals from the two γ decay of para-Ps and conversion of ortho-Ps into two 511 keV γ-rays. Some of the initial results obtained from using PsARS to investigate the formation of positronium in gases and the destruction of ortho-Ps at a surface are presented.
ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2006.01.047