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Mikael Elfman

Researcher

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The implementation of a DSSSD in the upgraded boron analysis at LIBAF for applications in geochemistry

Author

  • Per Kristiansson
  • Maciek Borysiuk
  • U. Halenius
  • J. L. Mosenfelder
  • Linus Ros
  • H. Skogby
  • N. Abdel
  • Mikael Elfman
  • E. J. C. Nilsson
  • Jan Pallon

Summary, in English

Interest in high spatial resolution boron analyses from a geochemical perspective is related to the recognition of boron as an important tracer of chemical recycling in the Earth, due to the high solubility of boron in aqueous fluids and silicate melts. Although boron is not a nominal component in common silicates they may still contain significant B-concentrations and hence constitute important boron reservoirs in the deeper parts of the Earth. Boron analyses have been performed at the Lund Ion Beam Analytical Facility for almost 20 years. For the analysis the nuclear reaction p+B-11 is used with beam energy just below 700 keV where the reaction has a broad resonance. In this paper we describe an upgrade of the system with a double sided silicon strip detector, which allows for much higher count rates compared to the old annular surface detector based system. A gain close to 20 in the data rate allows for high resolution mapping of boron distributions in crystals. This is illustrated by a number of examples. In addition, the detection limits for boron in geological samples are improved, now around 5 ppmw. In this work we address issues with data quality, especially charge normalization, lifetime correction and subtraction of different background components. (C) 2014 The Authors. Published by Elsevier B.V.

Department/s

  • Nuclear physics
  • NanoLund: Centre for Nanoscience

Publishing year

2014

Language

English

Pages

207-211

Publication/Series

Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms

Volume

332

Document type

Journal article

Publisher

Elsevier

Topic

  • Subatomic Physics

Keywords

  • 3 alpha)-Reaction
  • (p
  • Boron analysis
  • NRA
  • DSSSD

Status

Published

ISBN/ISSN/Other

  • ISSN: 0168-583X