Skip to main content Accessibility help

We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.

Close cookie message
×
  1. Home
  2. Search

Refine search

Refine search

Access:
Content type:
Publication date:
Apply   From and To filters
Subject: Show more
Journals Show more
Publishers: Show more
Societies Show more
Series: Show more
Collections: Show more

Actions for selected content:

Select all | Deselect all
  • View selected items
  • Export citations
  • Download PDF (zip)
  • Save to Kindle
  • Save to Dropbox
  • Save to Google Drive

Save Search

You can save your searches here and later view and run them again in "My saved searches".

Please provide a title, maximum of 40 characters.
Cancel
×

1 results

  • High-Level 14C Contamination and Recovery at Xi'an AMS Center

  • Weijian Zhou, Shugang Wu, Todd E Lange, Xuefeng Lu, Peng Cheng, Xiaohu Xiong, Richard J Cruz, Qi Liu, Yunchong Fu, Wennian Zhao
  • Journal:
    Radiocarbon / Volume 54 / Issue 2 / 2012
    Published online by Cambridge University Press:
    18 July 2016, pp. 187-193
    Print publication:
    2012
    • Article
      • You have access
    • PDF
    • Export citation

  • A sample with a radiocarbon concentration estimated to be greater than 105 times Modern was inadvertently graphitized and measured in the Xi'an AMS system last year. Both the sample preparation lines and the ion source system were seriously contaminated and a series of cleaning procedures were carried out to remove the contamination from them. After repeated and careful cleaning as well as continuous flushing with dead CO2 gas, both systems have recovered from the contamination event. The machine background is back to 2.0 x 10–16 and the chemical blank is beyond 50 kyr.