Journal Publications

This community mainly contains citations and URL's to full text content, yet where permitted, the PDF file, of the journal articles written by ANSTO authors.

Browse

Browsing Journal Publications by Subject "Accelerator experimental facilities"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Actinides AMS on the VEGA accelerator
    (Elsevier B. V., 2019-01-01) Hotchkis, MAC; Child, DP; Froehlich, MB; Wallner, A; Wilcken, KM; Williams, ML
    The VEGA 1MV accelerator at ANSTO is designed to be a highly versatile AMS instrument. In this paper we focus on describing those aspects of the system that are designed to optimise its performance for actinides isotopic analysis, in particular the implementation of fast isotope cycling and multiple isotope detection methods to enable isotope detection across a wide range of rates and currents. Charge state yields are reported in the energy range from 0.3 to 1.0 MeV with helium gas stripping, showing that the highest yield for the 3+ charge state occurs around 1 MeV and exceeds 40%. Accuracy and precision for uranium isotope ratios are shown to approach 1% over a wide range of concentrations and isotope ratios. The ionisation efficiency for plutonium is shown to exceed 3%, leading to overall detection efficiency over 1%. In the absence of background, this leads to sub-attogram detection limits for several Pu isotopes including 244Pu. Crown Copyright © 2018 Published by Elsevier B.V.
  • No Thumbnail Available
    Item
    Surface evolution and radiation damage of a zirconolite glass-ceramic by Au ion implantation
    (Elsevier, 2019-06) Wei, T; Zhang, YJ; Xu, A; Gregg, DJ; Karatchevtseva, I; Kong, L; Ionescu, M; Vance, ER
    Ion implantation using particle accelerators is a promising avenue to emulate the property-controlling microstructures created in nuclear materials. In the present study, the 21 MeV Au ion implantations with fluence up to 1 × 10 15 ion/cm 2 have been conducted on the surface of a zirconolite glass-ceramic. The microstructure modifications on the surface have been investigated by X-ray diffraction, Raman spectrometry, scanning electron microscopy and transmission electron microscopy. The amorphous behavior of the crystalline zirconolite and the structural change in the glassy phase has been identified subject to different fluences. The amorphization of zirconolite crystals occurred on the surface of sample subjected to 1 × 10 14 ion/cm 2 and the deformation of glass and zirconolite crystals near the surface were observed at the fluence of 1 × 10 15 ion/cm 2 . Crown Copyright © 2019 Published by Elsevier B.V. All rights reserved.