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dc.contributor.authorPasso, C. J.
dc.contributor.authorAnderson, Robert
dc.contributor.authorRoberts, David
dc.contributor.authorCook, G. T.
dc.date.accessioned2021-02-11T20:44:46Z
dc.date.available2021-02-11T20:44:46Z
dc.date.issued1998-01-01
dc.identifier.citationPasso, C. J., Anderson, R., Roberts, D., & Cook, G. T. (1998). Performance of the Packard Tri-Carb(R) 2770TR/SL liquid scintillation analyzer for 14C dating. Radiocarbon, 40(1), 193-200.
dc.identifier.issn0033-8222
dc.identifier.doi10.1017/S003382220001804X
dc.identifier.urihttp://hdl.handle.net/10150/653666
dc.descriptionFrom the 16th International Radiocarbon Conference held in Gronigen, Netherlands, June 16-20, 1997.
dc.description.abstractWe present results that demonstrate the potential of the Packard Tri-Carb(R) Model 2770TR/SL for radiocarbon dating. For 2 g of sample benzene, a stable background count rate of 0.307 cpm and a stable counting efficiency of 64.78% were determined using a 13-75 keV counting window. Changes to the mathematical routines for t-SIE (quench indicating parameter) calculation and a reduction in the activity of the external standard have enabled stability of the t-SIE to be achieved, and combined with the use of a suitable balance point counting window; all of these factors give the stability of performance required for 14C dating. Calculations based on the above parameters indicate that the limit of detection for 2 g samples, counted for 5000 min, is <48,900 yr BP. The great advantage of this system is that these data were acquired using inexpensive standard 7-mL low potassium borosilicate glass vials. Vial holders manufactured from BGO reduced the background to 0.15 cpm with a minimum effect on efficiency (64.46% for 13-75 keV). A similar calculation of the limit of detection gave >51,700 BP. The use of the BGO vial holders in other instruments employing time-resolved liquid scintillation counting (TR-LSC) (Models 2250CA and 2260XL) also brought about significant improvements in detection limits.
dc.language.isoen
dc.publisherDepartment of Geosciences, The University of Arizona
dc.relation.urlhttp://radiocarbon.webhost.uits.arizona.edu/
dc.rightsCopyright © by the Arizona Board of Regents on behalf of the University of Arizona. All rights reserved.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectefficiency
dc.subjectbackground level
dc.subjectaromatic hydrocarbons
dc.subjectbenzene
dc.subjecthydrocarbons
dc.subjectinstruments
dc.subjectliquid scintillation methods
dc.subjectPleistocene
dc.subjectorganic compounds
dc.subjectCenozoic
dc.subjectQuaternary
dc.subjectC 14
dc.subjectcarbon
dc.subjectdates
dc.subjectisotopes
dc.subjectradioactive isotopes
dc.subjectabsolute age
dc.titlePerformance of the Packard Tri-Carb(R) 2770TR/SL Liquid Scintillation Analyzer for 14C Dating
dc.typeProceedings
dc.typetext
dc.identifier.journalRadiocarbon
dc.description.noteThis material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.
dc.description.collectioninformationThe Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.description.admin-noteMigrated from OJS platform February 2021
dc.source.volume40
dc.source.issue1
dc.source.beginpage193
dc.source.endpage200
refterms.dateFOA2021-02-11T20:44:46Z


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