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The results demonstrate that there are no significant differences amongst the main measurement techniques (gas proportional counting, liquid scintillation counting and accelerator mass spectrometry (AMS)) but there is evidence of small laboratory offsets relative to known age samples for some laboratories.

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‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi.Dating began in 1966 after careful testing of counting electronics and counters. 1) surrounded by 2.5 cm of selected lead, followed by a ring of 23 cosmic-ray Geiger counters (model HZ-100, Zentralwerkstatt Göttingen). Above and on both long sides of the counters are 10 cm of paraffin wax with about 12% boric acid between the iron layers.The dating system has two 1-L copper-walled proportional counters of Östlund-Engstrand construction (for details see Stockholm V. To send this article to your Kindle, first ensure [email protected] added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. are all vital questions that archaeologists need to answer. " or dating issue and revolutionised archaeological research in southern Africa by providing radiocarbon dates where previously relative dating, such as "older than" or "younger than", were the order of the day.

He did his doctorate in physics at the University of Heidelberg.The authors summarise the results of the fourth of these scientific audits.