An inter-comparison of 10Be and 26Al AMS reference standards and the 10Be half-life

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dc.contributor.authorFink, Den_AU
dc.contributor.authorSmith, AMen_AU
dc.date.accessioned2021-12-16T01:18:27Zen_AU
dc.date.available2021-12-16T01:18:27Zen_AU
dc.date.issued2007-06en_AU
dc.date.statistics2021-11-09en_AU
dc.description.abstractWe have completed a survey and inter-comparison of several 10Be and 26Al standard reference materials (SRMs) that are in routine use at various AMS laboratories to assess their relative values and the accuracy of their quoted nominal ratios. The accelerator measurement cycle, analysis procedure and setup used at the ANTARES AMS facility for this survey are described. We focused on a new set of 10Be and 26Al serial dilutions of standard reference materials (SRMs) prepared by Kuni Nishiizumii at the University of California, Berkeley, and found excellent systematic reproducibility and internal consistency. For other standard materials, minor deviations are evident even when the results have been recalibrated to a common half-life. In particular, we confirm that the NIST 10Be SRM-4325 has a 14% greater 10Be/Be ratio than that certified by NIST when it is calibrated against other SRMs whose ratios have been normalized to a common 1.5 Ma 10Be half-life. In order to investigate this apparent discrepancy, we report on the results of an absolute, normalization independent, measure of the NIST-4325 10Be/Be ratio. Within the constraints of this type of measurement and its systematic errors, we determine an absolute value for the 10Be/Be SRM-4325 ratio in the range 26,050 to 24,800 × 10−15 in support of the certified value of 26,800 × 10−15 given by NIST. We hesitate to directly infer as a consequence that the 10Be half-life is 1.34 Ma because such an inference is contingent on a direct and accurate specific activity in the parent solution, which at present is not available. © 2007 Elsevier B.V.en_AU
dc.identifier.citationFink, D., & Smith, A. (2007). An inter-comparison of 10Be and 26Al AMS reference standards and the 10Be half-life. Paper presented to Tenth International Conference on Accelerator Mass Spectrometry, Berkeley, California, USA, 5-10 September 2005. In Knezovich, J., Brown, T., Buchholz., B., Finkel, R., Guilderson, T., Kashgarian, M., Nimz, G., Ognibene, T., Tumey, S., & Vogel, J. (Eds.). Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 259(1), 600-609. doi:10.1016/j.nimb.2007.01.299en_AU
dc.identifier.conferenceenddate10 September 2005en_AU
dc.identifier.conferencenameTenth International Conference on Accelerator Mass Spectrometryen_AU
dc.identifier.conferenceplaceBerkeley, Californiaen_AU
dc.identifier.conferencestartdate5 September 2005en_AU
dc.identifier.editorsKnezovich, J., Brown, T., Buchholz., B., Finkel, R., Guilderson, T., Kashgarian, M., Nimz, G., Ognibene, T., Tumey, S., & Vogel, J.en_AU
dc.identifier.issn0168-583Xen_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atomsen_AU
dc.identifier.pagination600-609en_AU
dc.identifier.placeofpublicationBerkeley, Californiaen_AU
dc.identifier.urihttps://doi.org/10.1016/j.nimb.2007.01.299en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12473en_AU
dc.identifier.volume259en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectHalf-lifeen_AU
dc.subjectAbsolute countingen_AU
dc.subjectCalibration standardsen_AU
dc.subjectBeryllium 10en_AU
dc.subjectAluminium 26en_AU
dc.subjectAcceleratorsen_AU
dc.subjectMass spectroscopyen_AU
dc.titleAn inter-comparison of 10Be and 26Al AMS reference standards and the 10Be half-lifeen_AU
dc.typeConference Paperen_AU
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