Accelerator Mass Spectrometry on SIRIUS: New 6 MV spectrometer at ANSTO

Abstract

The rst ECAART conference was held in Frankfurt (1989) and over almost three decades it has kept its status as a high level conference reporting latest developments in the eld of particle accelerators and their applications. The previous ECAART conferences were organized in Florence (2007), Athens (2010) and Namur (2013), and in 2016 ECAART is the rst time organized in Scandinavia. The Accelerator Laboratory in Jyväskylä is a national research infrastructure in the eld of nuclear and accelerator based physics with two cyclotrons, a 1.7 MV Pelletron and a 20 MeV electron LINAC. The research covers many of the ECAART topics and therefore we are especially proud to have the conference site in Agora, only some hundred meters from the laboratory. Following the tradition, there are no parallel sessions in ECAART12. There will be all together 13 invited talks, 29 contributed talks, and more than 110 poster presentations. The posters are divided into Tuesday and Thursday sessions and they are visible also the day before the session. There is one special session on Tuesday morning celebrating 40 years of elastic recoil detection analysis (ERDA) and we are proud to have professor Jacques L'Écuyer, the rst author of 1976 ERDA paper as an invited speaker in this session. On Wednesday before the lunch and outing there is a special discussion session about the current status of the ion beam technology roadmap, an initiative by the IAEA. Excellent science is an important part of a scienti c meeting but equally important it is to meet old friends and make new ones. We are convinced that Jyväskylä, a lively city with one of the biggest universities in Finland in the middle of the Finnish Lake District will promote all of this. During the social program also the clean nature, short midsummer nights and, of course, Finnish sauna will become familiar to the conference participants. We will do our utmost to make sure that you will feel at home and together we will make this conference a productive and engaging one.

Tracking the <sup>10</sup>Be–<sup>26</sup>Al source-area signal in sediment-routing systems of arid central Australia

“…However, as our data show, the downsystem propagation of source-area signals tends to be scale dependent: the widest spread of 10 Be occurs among hillslope bedrock outcrops (Fig. 5) from which the buffering effect of sediment transport downslope and downstream leads to progressively more stable catchment-averaged signals of erosion rate or particle burial (Wittmann and von Blanckenburg, 2016). This raises the question of under what circumstances can we expect 10 Be-26 Al inventories to yield an accurate picture of erosion in the source area.…”

26Al/10Be ratios reveal the source of river sediments in the Kimberley, NW Australia

“…Following crushing and sieving, magnetic minerals were separated using a Franz magnetic separator and the non-magnetic fraction washed in Aqua-Regia at 100°C for at least 24 hours. Samples were analysed using the 10MV ANTARES and 6MV SIRIUS facilities at ANSTO (Fink and Smith, 2007;Wilcken et al, 2017Wilcken et al, , 2019. The above sample preparation steps were carried out at the University of Wollongong.…”

“…Quartz dissolution and extraction of the Be and Al fractions was done at ANSTO following procedures described in Child et al (2000), using~300 μg of 9 Be from a low-level beryl carrier solution added prior to complete HF dissolution. Samples were analysed using the 10MV ANTARES and 6MV SIRIUS facilities at ANSTO (Fink and Smith, 2007;Wilcken et al, 2017Wilcken et al, , 2019. The native Al concentration of the samples ranged from 112 to 299 ppm (median = 158 ppm) and was determined via ICP-OES with a precision of 3-4% (Fujioka et al, 2015b).…”

Tracking the <sup>26</sup>Al/<sup>10</sup>Be source-area signal in sediment-routing systems of arid central Australia

“…Quartz isolation and Be and Al extraction were conducted on the 250-500 µm size fraction of sediment and crushed bedrock samples at the University of Wollongong and at the Australian Nuclear Science and Technology Organisation using standard methods of HF/HNO 3 (Kohl and Nishiizumi, 1992), hot phosphoric acid (Mifsud et al, 2013), and ion chromatography (Child et al, 2000). Be and Al isotope ratios were measured on the ANTARES and SIRIUS Accelerator Mass Spectrometers (AMS) (Fink and Smith, 2007;Wilcken et al, 2017) and normalised to standards We assume a 10 Be half-life of 1.387 ± 0.012 m.y. (Chmeleff et al, 2010;Korschinek et al, 2010), 26 Al half-life of 0.705 ± 0.024 m.y.…”