Determination of Oxygen in Oxide Films by Neutron Activation Analysis

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Preliminary experiments were conducted to evaluate the use of the nuclear reactions Li/sup 6/ (n, alpha )H/sup 3/ and O/sup 16/(H/sup 3/,n) F/sup 18/ to determine the thickness of oxide films on metals. Sheets of thin paper and of aluminum, imbedded in powdered LiF, were irradiated with pile neutrons at a flux of 6 x 10/sup 11/ n/cm/sup 2//sec and counted with an end-window proportional counter. A saturation activity of 1.87 hr F/sup 18/ of 150 dis/min per microgram of oxygen was observed in the paper, but radioactivity due to impurities masked F/sup 18/ in the aluminum. It is concluded ... continued below

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6 p.

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Winchester, J. W.; Meyer, R. E.; Bate, L. C. & Leddicotte, G. W. July 15, 1959.

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Description

Preliminary experiments were conducted to evaluate the use of the nuclear reactions Li/sup 6/ (n, alpha )H/sup 3/ and O/sup 16/(H/sup 3/,n) F/sup 18/ to determine the thickness of oxide films on metals. Sheets of thin paper and of aluminum, imbedded in powdered LiF, were irradiated with pile neutrons at a flux of 6 x 10/sup 11/ n/cm/sup 2//sec and counted with an end-window proportional counter. A saturation activity of 1.87 hr F/sup 18/ of 150 dis/min per microgram of oxygen was observed in the paper, but radioactivity due to impurities masked F/sup 18/ in the aluminum. It is concluded that a 1 A (0.01 mu gm/cm/sup 2/) oxide film thickness may be measured by a neutron irradiation at a flux of 10/sup 14/ n/cm/sup 2//sec but chemical separation of induced radioactivity from the bulk metal is essential. (auth)

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6 p.

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NTIS

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  • Other Information: Orig. Receipt Date: 31-DEC-60

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  • Report No.: CF-59-7-128
  • Grant Number: W-7405-ENG-26
  • DOI: 10.2172/4166598 | External Link
  • Office of Scientific & Technical Information Report Number: 4166598
  • Archival Resource Key: ark:/67531/metadc871389

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  • July 15, 1959

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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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Winchester, J. W.; Meyer, R. E.; Bate, L. C. & Leddicotte, G. W. Determination of Oxygen in Oxide Films by Neutron Activation Analysis, report, July 15, 1959; Tennessee. (digital.library.unt.edu/ark:/67531/metadc871389/: accessed December 13, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.