Spin conversion of positronium in paramagnetic solutions studied by age-momentum-correlation method

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Correlated measurement of the lifetime and of the lineshape of the 511 keV annihilation radiation of positrons (age-momentum correlation, AMOC) has become a powerful tool for investigating reactions of positron or positronium in condensed matter as a function of time. The beam-based β+γΔΕ AMOC method installed at the Stuttgart relativistic positron beam facility (Ekin e+≈4MeV) offers substantial advantages over the conventional γγΔE coincidence technique resulting in a fast data taking due to the unity detection efficiency of the β+ scintillator which provides the start signal for the lifetime measurement. In this paper the application of AMOC to positronium chemistry is illustrated by the study of spin conversion of positronium in the system methanol/HTEMPO as a function of HTEMPO (4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl, a paramagnetic solute) concentration. The same technique can be applied to other systems and other reactions in positronium chemistry, e. g., oxidation or complex formation.

Original languageEnglish
Pages (from-to)481-491
Number of pages11
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume190
Issue number2
DOIs
Publication statusPublished - Mar 1995

Fingerprint

Correlation methods
Positrons
Momentum
Electrons
Phosphors
Methanol
Radiation
Oxidation

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Inorganic Chemistry
  • Analytical Chemistry
  • Radiology Nuclear Medicine and imaging
  • Public Health, Environmental and Occupational Health
  • Pollution
  • Health, Toxicology and Mutagenesis
  • Spectroscopy

Cite this

Spin conversion of positronium in paramagnetic solutions studied by age-momentum-correlation method. / Major, J.; Schneider, H.; Seeger, A.; Siegle, A.; Stoll, H.; Billard, I.; Koch, M.; Lauff, U.

In: Journal of Radioanalytical and Nuclear Chemistry, Vol. 190, No. 2, 03.1995, p. 481-491.

Research output: Contribution to journalArticle

Major, J. ; Schneider, H. ; Seeger, A. ; Siegle, A. ; Stoll, H. ; Billard, I. ; Koch, M. ; Lauff, U. / Spin conversion of positronium in paramagnetic solutions studied by age-momentum-correlation method. In: Journal of Radioanalytical and Nuclear Chemistry. 1995 ; Vol. 190, No. 2. pp. 481-491.
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AU - Koch, M.

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