Electrochemical switching of positronium triplet quenching

Philipp Emanuel Brunner*, Eva-Maria Steyskal, Roland Würschum

*Korrespondierende/r Autor/-in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikelBegutachtung

Abstract

Switching of positronium triplet quenching could successfully be demonstrated by electrochemical means in an aqueous K3[Fe(CN)6] electrolyte. For this purpose a suitable cell was designed to combine positron annihilation with electrochemical measurements. Highly reversible substantial variations of the mean positron lifetime τm could be observed upon electrochemical switching between the oxidation states Fe(CN)63- and Fe(CN)64-, arising from oxidation of positronium by Fe(CN)63-. Dynamic in situ measurements in dependence of potential exhibit a hysteresis like behavior of τm which perfectly correlates with the shift between the reduction and oxidation peaks simultaneously monitored by cyclic voltametry.

Originalspracheenglisch
Seiten (von - bis)25278-25283
Seitenumfang6
FachzeitschriftPhysical Chemistry, Chemical Physics
Jahrgang23
Ausgabenummer44
DOIs
PublikationsstatusVeröffentlicht - 28 Nov. 2021

ASJC Scopus subject areas

  • Physik und Astronomie (insg.)
  • Elektrochemie

Fields of Expertise

  • Advanced Materials Science

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