Abstract
Positron emission particle tracking (PEPT) is a non-invasive technique used for obtaining dynamic information within multiphase systems. It involves tracking a single radioactively labelled tracer particle. The tracking efficiency and representative of PEPT data are crucially dependent on the amount of radioactivity labelled in a single particle, as well as the physical and chemical properties of a tracer. This paper will discuss the effect of tracer properties on PEPT data and two labelling techniques, direct activation and ion-exchange, in detail. In direct activation, particles are directly bombarded using a 33 MeV He-3 beam. A few of the oxygen atoms in the particles are then converted into F-18 radioisotope. Direct activation can be used to label a particle with a size range from 1 to 10 mm, but the material must be able to resist a high temperature. The ion-exchange technique can be used to label smaller resin particles with a size ranging from 60 to 1000 mu m. The radioactivity labelled in a single resin bead is controlled by ion-exchange properties of the resin material, anions present in the radioactive water and processing time. (c) 2006 Elsevier B.V. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 345-350 |
| Number of pages | 6 |
| Journal | Nuclear Instruments & Methods in Physics Research. Section A. Accelerators, Spectrometers, Detectors |
| Volume | 562(1) |
| Publication status | Published - 15 Jun 2006 |
Keywords
- tracer property
- PEPT
- ion-exchange
- direct activation
- tracer labelling