High-sensitivity isobar-free AMS measurements and reference materials for 55Fe, 68Ge and 202gPb

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dc.contributor.authorWallner, Aen_AU
dc.contributor.authorBichler, Men_AU
dc.contributor.authorBuczak, Ken_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorForstner, Oen_AU
dc.contributor.authorGolser, Ren_AU
dc.contributor.authorHotchkis, MACen_AU
dc.contributor.authorKlix, Aen_AU
dc.contributor.authorKrása, Aen_AU
dc.contributor.authorKutschera, Wen_AU
dc.contributor.authorLederer, Cen_AU
dc.contributor.authorPlompen, AJMen_AU
dc.contributor.authorPriller, Aen_AU
dc.contributor.authorSchumann, Den_AU
dc.contributor.authorSemkova, VMen_AU
dc.contributor.authorSteier, Pen_AU
dc.date.accessioned2020-06-12T00:07:39Zen_AU
dc.date.available2020-06-12T00:07:39Zen_AU
dc.date.issued2013-01-01en_AU
dc.date.statistics2020-06-01en_AU
dc.descriptionProceedings of the Twelfth International Conference on Accelerator Mass Spectrometry, Wellington, New Zealand, 20-25 March 2011.en_AU
dc.description.abstractIsobaric interference represents one of the major limitations in mass spectrometry. For a few cases in AMS with tandem accelerators, isobaric interference is completely excluded like the well-known major isotopes 14C, 26Al, 129I. Additional isotopes are 55Fe (t1/2=2.74years), 68Ge (t1/2=270.9days) and 202Pb (t1/2=52.5kyr), with 68Ge and 202Pb never been used in AMS so far. Their respective stable isobars, 55Mn, 68Zn and 202Hg do not form stable negative ions. The exceptional sensitivity of AMS for 55Fe, 68Ge and 202gPb offers important insights into such different fields like nuclear astrophysics, fundamental nuclear physics and technological applications. VERA, a dedicated AMS facility is well suited for developing procedures for new and non-standard isotopes. AMS measurements at the VERA facility established low backgrounds for these radionuclides in natural samples. Limits for isotope ratios of <10−15, <10−16 and ⩽2×10−14 were measured for 55Fe/56Fe, 68Ge/70Ge and 202Pb/Pb, respectively. In order to generate accurate isotope ratios of sample materials, AMS relies on the parallel measurement of reference materials with well-known ratios. A new and highly accurate reference material for 55Fe measurements with an uncertainty of ±1.6% was produced from a certified reference solution. In case of 68Ge dedicated neutron activations produced a sufficiently large number of 68Ge atoms that allowed quantifying them through the activity of its decay product 68Ga. Finally, for 202Pb, the short-lived isobar 202Tl was produced via neutron activation and served as a proxy for 202Pb AMS measurements. © 2012 Elsevier B.V.en_AU
dc.identifier.citationWallner, A., Bichler, M., Buczak, K., Fink, D., Forstner, O., Golser, R., Hotchkis, M. A. C., Klix, A., Krasa, A., Kutschera, W., Lederer, C., Plompen, A., Priller, A., Schumann, D., Semkova, V., & Steier, P. (2013). High-sensitivity isobar-free AMS measurements and reference materials for 55Fe, 68Ge and 202gPb. Paper presented at the Twelfth International Conference on Accelerator Mass Spectrometry, 20-25 March 2011, Wellington, New Zealand. In Zondervan, A., Prior, C., Bruhn, F., & Sparks, R. (Eds), Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 294, 374-381. doi:10.1016/j.nimb.2012.03.029en_AU
dc.identifier.conferenceenddate25 March 2011en_AU
dc.identifier.conferencenameTwelfth International Conference on Accelerator Mass Spectrometry 2011en_AU
dc.identifier.conferenceplaceWellington, New Zealand.en_AU
dc.identifier.conferencestartdate20 March 2011en_AU
dc.identifier.editorsZondervan, A., Prior, C., Bruhn, F., & Sparks, R.en_AU
dc.identifier.govdoc9682en_AU
dc.identifier.issn0168-583Xen_AU
dc.identifier.journaltitleNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atomsen_AU
dc.identifier.pagination374-381en_AU
dc.identifier.urihttps://doi.org/10.1016/j.nimb.2012.03.029en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/9600en_AU
dc.identifier.volume294en_AU
dc.language.isoenen_AU
dc.publisherElsevier B.V.en_AU
dc.subjectIsospinen_AU
dc.subjectMass spectroscopyen_AU
dc.subjectAcceleratorsen_AU
dc.subjectInterferenceen_AU
dc.subjectIsotopesen_AU
dc.subjectCarbon 14en_AU
dc.subjectRadioisotopesen_AU
dc.subjectIodine isotopesen_AU
dc.subjectGallium isotopesen_AU
dc.subjectGermanium isotopesen_AU
dc.subjectPhysicsen_AU
dc.subjectIron isotopesen_AU
dc.subjectNeutron activation analysisen_AU
dc.titleHigh-sensitivity isobar-free AMS measurements and reference materials for 55Fe, 68Ge and 202gPben_AU
dc.typeConference paperen_AU
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