Positron annihilation in solid and liquid Ni

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New techniques have been developed for the study of metals via positron annihilation which provide for the in-situ melting of the samples and subsequent measurements via Doppler broadening of positron-annihilation radiation. Here we report these metods currently in use at our laboratory; ion implantation of /sup 58/Co and the use of Al/sub 2/O/sub 3/ crucibles for in-situ melting followed by the decomposition of the Doppler-broadened spectrum into a parabolic and a Gaussian component. Our earliest results obtained for pure Ni in the polycrystalline solid and in the liquid state are compared. An interesting similarity is reported for the distributions of ... continued below

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4 pages

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Fluss, M.J.; Smedskjaer, L.C.; Chakraborty, B. & Chason, M.K. March 1, 1982.

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Description

New techniques have been developed for the study of metals via positron annihilation which provide for the in-situ melting of the samples and subsequent measurements via Doppler broadening of positron-annihilation radiation. Here we report these metods currently in use at our laboratory; ion implantation of /sup 58/Co and the use of Al/sub 2/O/sub 3/ crucibles for in-situ melting followed by the decomposition of the Doppler-broadened spectrum into a parabolic and a Gaussian component. Our earliest results obtained for pure Ni in the polycrystalline solid and in the liquid state are compared. An interesting similarity is reported for the distributions of the high-momentum (Gaussian) component for positrons annihilating in vacancies at high temperatures and those annihilating in liquid Ni.

Physical Description

4 pages

Notes

NTIS, PC A02/MF A01; 1.

Source

  • 6. international conference on positron annihilation, Arlington, TX, USA, 3 Apr 1982

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  • Other: DE83007820
  • Report No.: CONF-820434-17
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 6386643
  • Archival Resource Key: ark:/67531/metadc1204119

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Office of Scientific & Technical Information Technical Reports

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  • March 1, 1982

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  • July 5, 2018, 11:11 p.m.

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  • April 26, 2019, 1:55 p.m.

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Fluss, M.J.; Smedskjaer, L.C.; Chakraborty, B. & Chason, M.K. Positron annihilation in solid and liquid Ni, article, March 1, 1982; Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1204119/: accessed July 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.