Detection of internally deposited actinides. Part III. Recent background studies at ORNL

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It has been apparent from accumulated data at ORNL that the low-energy (less than 100 keV) phoswich background spectrum in the iron-shielded counting facility has components, possibly including a line below 15 keV, whose magnitudes show considerable variability. We have used a planar intrinsic Ge detector designed especially for measuring low-energy photons for background study as part of an evaluation of such a device for in vivo $sup 239$Pu measurement. The spectrum that was observed consisted of a continuum upon which were superimposed discrete lines including a strong line at 10.35 keV in addition to the well-known lines from Pb ... continued below

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6 p.

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Good, W.M.; Bemis, C.E. & Goans, R.E. January 1, 1975.

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It has been apparent from accumulated data at ORNL that the low-energy (less than 100 keV) phoswich background spectrum in the iron-shielded counting facility has components, possibly including a line below 15 keV, whose magnitudes show considerable variability. We have used a planar intrinsic Ge detector designed especially for measuring low-energy photons for background study as part of an evaluation of such a device for in vivo $sup 239$Pu measurement. The spectrum that was observed consisted of a continuum upon which were superimposed discrete lines including a strong line at 10.35 keV in addition to the well-known lines from Pb X rays. Detectable also were X rays that corresponded to K-lines of several of the products of the naturally occurring radioactive decay series. Background spectra are presented and the implications of their variability are discussed. (auth)

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6 p.

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Dep. NTIS

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  • 9. topical symposium on operational health physics, Denver, Colorado, USA, 9 Feb 1976

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  • Report No.: CONF-760202--8
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 4124991
  • Archival Resource Key: ark:/67531/metadc865919

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  • January 1, 1975

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  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 11, 2017, 1:43 p.m.

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Good, W.M.; Bemis, C.E. & Goans, R.E. Detection of internally deposited actinides. Part III. Recent background studies at ORNL, article, January 1, 1975; Tennessee. (digital.library.unt.edu/ark:/67531/metadc865919/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.