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7Be analyses in seawater by low background gamma-spectroscopy

  • J. E. Andrews
  • C. Hartin
  • K. O. Buesseler
Environmental Radioactivity

Abstract

Oceanographers use the cosmogenic radionuclide 7Be (T 1/2 53 days) as a tracer for atmospheric input and a conservative tracer of mixing in the open ocean. This paper elucidates a method for improving the analysis of 7Be from seawater. The scavenging efficiency of Fe(OH)3 for each sample is measured by ICP-MS using stable 9Be as a yield monitor. Samples are gamma-counted in a large diameter (28 mm) well detector. The high purity germanium well detector is coupled with an active anti-coincidence cosmic guard to reduce the spectra background. The improved overall accuracy of the method and lower detection limit of the detector results in a lower volume of seawater needed for analyses. Results will be shown from a study of 7Be in the Sargasso Sea.

Keywords

Radon Collection Efficiency Euphotic Zone HPGe Detector Cosmic Radiation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC. 2008

Authors and Affiliations

  1. 1.Woods Hole Oceanographic InstitutionWoods HoleUSA
  2. 2.Queens CollegeQueensUSA

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