Absolute instrumental neutron activation analysis at Lawrence Livermore Laboratory

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The Environmental Science Division at Lawrence Livermore Laboratory has in use a system of absolute Instrumental Neutron Activation Analysis (INAA). Basically, absolute INAA is dependent upon the absolute measurement of the disintegration rates of the nuclides produced by neutron capture. From such disintegration rate data, the amount of the target element present in the irradiated sample is calculated by dividing the observed disintegration rate for each nuclide by the expected value for the disintegration rate per microgram of the target element that produced the nuclide. In absolute INAA, the expected value for disintegration rate per microgram is calculated from nuclear ... continued below

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Pages: 15

Creation Information

Heft, R.E. December 21, 1977.

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  • Lawrence Livermore Laboratory
    Publisher Info: California Univ., Livermore (USA). Lawrence Livermore Lab.
    Place of Publication: Livermore, California

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Description

The Environmental Science Division at Lawrence Livermore Laboratory has in use a system of absolute Instrumental Neutron Activation Analysis (INAA). Basically, absolute INAA is dependent upon the absolute measurement of the disintegration rates of the nuclides produced by neutron capture. From such disintegration rate data, the amount of the target element present in the irradiated sample is calculated by dividing the observed disintegration rate for each nuclide by the expected value for the disintegration rate per microgram of the target element that produced the nuclide. In absolute INAA, the expected value for disintegration rate per microgram is calculated from nuclear parameters and from measured values of both thermal and epithermal neutron fluxes which were present during irradiation. Absolute INAA does not depend on the concurrent irradiation of elemental standards but does depend on the values for thermal and epithermal neutron capture cross-sections for the target nuclides. A description of the analytical method is presented.

Physical Description

Pages: 15

Notes

Dep. NTIS, PC A02/MF A01.

Source

  • 3. international conference on nuclear methods in environmental and energy research, Columbia, MO, USA, 10 Oct 1977

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  • Report No.: UCRL-80476
  • Report No.: CONF-771072-4
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 5229790
  • Archival Resource Key: ark:/67531/metadc1070473

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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.

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Creation Date

  • December 21, 1977

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

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  • May 8, 2018, 11:46 a.m.

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Heft, R.E. Absolute instrumental neutron activation analysis at Lawrence Livermore Laboratory, article, December 21, 1977; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc1070473/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.