title: Micelle size effect on Fe-55 liquid scintillation efficiency.
abstract: We used efficiency tracing techniques to study the micelle size effect on liquid scintillation counting of the electron capture nuclide, (55)Fe. We determined micelle hydrodynamic diameters for specific LS cocktails via dynamic light scattering, and sought trends in efficiencies as a function of micelle size. The presence of Fe(3+) or Mn(2+) ions in the cocktails did not significantly affect micelle sizes or fluorescence quenching. We did not detect any reductions in counting efficiencies due to the micelle size effect.
authors.affiliation: Physical Measurements Laboratory, National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, MD 20899-8462, USA. Electronic address: bergeron@nist.gov.
authors.forename: Denis E
authors.initials: DE
authors.lastname: Bergeron
authors.affiliation: Physical Measurements Laboratory, National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, MD 20899-8462, USA.
authors.forename: Lizbeth
authors.initials: L
authors.lastname: Laureano-Pérez
keywords: Cocktail; H-3; Liquid scintillation counting; Mn-54; Reverse micelle