Abstract
The Doppler broadening of positron annihilation photons was measured in 17 metals. A model which considers the positron lifetime spectra in metals to be composed of terms for annihilation with conduction and core electrons and surface centers of low electron momentum is used to correlate calculated core annihilation rates with the Doppler lineshape. Ta metal was doped with defects with high energy implantations of14N+4 ions at variable doses. Differences in the Doppler linewidths were ascribed as being principally a reflection of the probabilty of annihilation with core electrons relative to annihilation with conduction electrons.
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See for example, J. A. Merrigan, S. J. Tao, J. Green: In: Weissberger, A., Rossiter, B. W. (Eds.):Physical Methods of Chemistry, Vol. I, Part 111 D. Chapter VIII, pp. 501–586. (J. Wiley & Sons, New York 1972)
R. E. Leber, R. M. Lambrecht: J. Chem. Phys.57, 2273 (1972)
A. Bisi, G. Faini, E. Gatti, L. Zappa: Phys. Rev. Letters5, 59 (1960).—G. Fabri, G. Poletti, G. Randone: Phys. Rev.151, 356 (1966)
G. Jones, J. B. Warren: Can. J. Phys.39, 1517 (1961)
H. Weisberg, S. Berko: Phys. Rev.154, 249 (1967)
R. M. J. Cotterill, I. K. MacKenzie, L. Smedskjaer, G. Trumpy, J. H. O. L. Träff: Nature239, 99 (1972)
J. P. Carbotte: Phys. Rev.144, 309 (1966).—J. P. Carbotte: Phys. Rev.155, 197 (1967).—S. Kahana: Phys. Rev.129, 1622 (1963).—P. Bhattacharya, K. S. singwi: Phys. Rev. Letters29, 22 (1972)
H. Kanazawa, Y. H. Ohtsuki, S. Yanagawa: Phys. Rev.138A, 1155 (1965)
I. K. MacKenzie, C. W. Shulte, T. Jackman, J. L. Campbell: Phys. Rev. A7, 135 (1973)
M. Bertolaccini, L. Zappa: Nuovo Cimento52B,, 487 (1967)
I. K. MacKenzie: Private communication, 1972
J. C. Grag, B. L. Saraf: J. Phys. Soc. Japan27, 1697 (1969).—J. C. Garg, B. L. Saraf: Chem. Phys. Letters5, 591 (1970)
S. B. Shrivastava, B. D. Shrivastava, V. S. Dubey: Physica58, 140 (1972)
The limitatations, both instrumental and physical, in measuring short lifetimes, or using literature data, or redetermining data are subject to well known criticisms. In the cases whereλ 1 or τ1 were reported relative to Al, we used Weisberg's data [5] to obtainλ obs. The errors inλ core arise from both the absolute and relative determinations
I. K. MacKenzie: Phys. Letters30A, 115 (1969).—I. K. MacKenzie, J. A. Eady, R. R. Gingerich: Phys. Letters33A, 279 (1970)
A. T. Stewart: Can. J. Phys.35, 168 (1957).—J. H. Kusmiss, A. T. Stewart: Advan. Phys.16, 471 (1967)
T. E. Jackman, C. W. Schulte, T. L. Campbell, P. C. Lichtenberger, I. K. Mackenzie, M. R. Wormald: J. Phys. F. (Metal Phys.)4, 1 (1974)
T. E. Jackman, J. L. Campbell: Revisions and additions to above report (1974)
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Research performed under the auspices of the U.S. Atomic Energy Commission.
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Barshay, S.S., Leber, R.E. & Lambrecht, R.M. Doppler broadening of positron annihilation photons in metals. Appl. Phys. 5, 67–70 (1974). https://doi.org/10.1007/BF01193398
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DOI: https://doi.org/10.1007/BF01193398