Depth profiling of tritium by neutron time-of-flight

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A method was developed to measure the depth profile of tritium implanted or absorbed in materials. The sample to be analyzed is bombarded with a pulsed proton beam and the energy of neutrons produced by the T(p,n) reaction is measured by the time-of-flight technique. From the neutron energy the depth in the target of the T atoms may be inferred. A sensitivity of 0.1 at. percent T or greater is possible. The technique is non-destructive and may be used with thick or radioactive host materials. Samples up to 20 $mu$m in thickness may be profiled with resolution limited by straggling ... continued below

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Pages: 19

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Davis, J.C.; Anderson, J.D. & Lefevre, H.W. January 1, 1975.

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Description

A method was developed to measure the depth profile of tritium implanted or absorbed in materials. The sample to be analyzed is bombarded with a pulsed proton beam and the energy of neutrons produced by the T(p,n) reaction is measured by the time-of-flight technique. From the neutron energy the depth in the target of the T atoms may be inferred. A sensitivity of 0.1 at. percent T or greater is possible. The technique is non-destructive and may be used with thick or radioactive host materials. Samples up to 20 $mu$m in thickness may be profiled with resolution limited by straggling of the proton beam for depths greater than 1 $mu$m. Deuterium depth profiling has been demonstrated using the D(d,n) reaction. The technique has been used to observe the behavior of an implantation spike of T produced by a 400 keV T$sup +$ beam stopping at a depth of 3 $mu$m in 11 $mu$m thick layers of Ti and TiH. The presence of H in the Ti lattice is observed to inhibit the diffusion of T through the lattice. Effects of the total hydrogen concentration (H + T) being forced above stoichiometry at the implantation site are suggested by the shapes of the implanation spikes. (auth)

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Pages: 19

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Dep. NTIS

Source

  • International conference on radiation effects and tritium technology for fusion reactors, Gatlinburg, Tennessee, USA, 1 Oct 1975

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  • Report No.: UCRL--77153
  • Report No.: CONF-751026--23
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 4161897
  • Archival Resource Key: ark:/67531/metadc864496

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  • January 1, 1975

Added to The UNT Digital Library

  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 18, 2016, 1:24 p.m.

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Davis, J.C.; Anderson, J.D. & Lefevre, H.W. Depth profiling of tritium by neutron time-of-flight, article, January 1, 1975; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc864496/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.