Positronium chemistry studied by AMOC measurements using a relativistic positron beam

H. Schneider, A. Seeger, A. Siegle, H. Stoll, I. Billard, M. Koch, U. Lauff, J. Major

Research output: Contribution to journalConference article

9 Citations (Scopus)

Abstract

Beam-based Age-Momentum Correlation (β+γΔE AMOC) measurements using an MeV positron beam have become a powerful tool to study chemical reactions of positronium by time-domain observations of the different positron states tagged by the Doppler-broadening (ΔE) characteristics of the 511 keV annihilation radiation. As an example, the investigation of the spin-conversion reaction in the system HTEMPO/methanol is reported. The experimental data for small HTEMPO concentrations can be fitted quite well to a rate-equation model containing the conversion rate as the only adjustable parameter. This model can presumably be applied not only to spin conversion but also to other chemical reactions and to inhibition of positronium. Possible effects of oxidation, complex formation, and inhibition are discussed by way of examples.

Original languageEnglish
Pages (from-to)69-76
Number of pages8
JournalJournal De Physique. IV : JP
Volume3
Issue number4
DOIs
Publication statusPublished - 1993
EventProceedings of the 4th International Workshop on Positron and Positronium Chemistry - Le Mont Sainte-Odile, Fr
Duration: Jun 20 1993Jun 24 1993

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Schneider, H., Seeger, A., Siegle, A., Stoll, H., Billard, I., Koch, M., Lauff, U., & Major, J. (1993). Positronium chemistry studied by AMOC measurements using a relativistic positron beam. Journal De Physique. IV : JP, 3(4), 69-76. https://doi.org/10.1051/jp4:1993407