Liquid-scintillation alpha-detection techniques

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Accurate, quantitative determinations of alpha-emitting nuclides by conventional plate-counting methods are difficult because of sample self-absorption problems in counting and because of non-reproducible losses in conventional sample separation methods. Liquid scintillation alpha spectrometry offers an attractive with no sample self-absorption or geometry problems and with 100% counting efficiency. Sample preparation may include extraction of the alpha emitter of interest by a specific organic-phase-soluble compound directly into the liquid scintillation counting medium. Detection electronics use energy and pulse-shape discrimination to yield alpha spectra without beta and gamma background interference. Specific procedures have been developed for gross alpha, uranium, plutonium, thorium, and ... continued below

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Pages: 10

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McKlveen, J.W. & McDowell, W.J. January 1, 1983.

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Description

Accurate, quantitative determinations of alpha-emitting nuclides by conventional plate-counting methods are difficult because of sample self-absorption problems in counting and because of non-reproducible losses in conventional sample separation methods. Liquid scintillation alpha spectrometry offers an attractive with no sample self-absorption or geometry problems and with 100% counting efficiency. Sample preparation may include extraction of the alpha emitter of interest by a specific organic-phase-soluble compound directly into the liquid scintillation counting medium. Detection electronics use energy and pulse-shape discrimination to yield alpha spectra without beta and gamma background interference. Specific procedures have been developed for gross alpha, uranium, plutonium, thorium, and polonium assay. Possibilities for a large number of other applications exist. Accuracy and reproducibility are typically in the 1% range. Backgrounds on the order of 0.01 cpm are readily achievable. The paper will present an overview of liquid scintillation alpha counting techniques and some of the results achieved for specific applications.

Physical Description

Pages: 10

Notes

NTIS, PC A02/MF A01.

Source

  • International meeting for radionuclide metrology - alpha particle spectrometry and low level measurement, Harwell, UK, 10 May 1983

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  • Other: DE83015520
  • Report No.: CONF-830539-2
  • Grant Number: W-7405-ENG-26
  • Office of Scientific & Technical Information Report Number: 5956562
  • Archival Resource Key: ark:/67531/metadc1103462

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • January 1, 1983

Added to The UNT Digital Library

  • Feb. 18, 2018, 3:59 p.m.

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  • April 6, 2018, 1:07 p.m.

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McKlveen, J.W. & McDowell, W.J. Liquid-scintillation alpha-detection techniques, article, January 1, 1983; United States. (digital.library.unt.edu/ark:/67531/metadc1103462/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.