Abstract
The rate of positron detrapping in thermal equilibrium from lattice defects has been calculated by relating it to the specific trapping rate. The results for vacancies, dislocations and surfaces each show a different temperature dependence for the escape rate. For vacancies a measure of the importance of the detrapping can be obtained from the ratio of the vacancy formation energy to the positron binding energy in the defect. The positronium desorption rate from a surface is also calculated and agreement with experimental results is found.
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References
K.F.Canter, A.P.Mills, Jr., S.Berko: Phys. Rev. Lett.33, 7 (1974)
K.G.Lynn: Phys. Rev. Lett.43, 391 (1979); J. Phys. C12, L435 (1979)
A.P.Mills, Jr.: Solid State Commun.31, 623 (1979)
P.J.Schultz, K.G.Lynn, I.K.MacKenzie, Y.C.Jean, C.L.Snead, Jr.: Phys. Rev. Lett.44, 1629 (1980)
L.C.Smedskjaer, M.Manninen, M.J.Fluss: J. Phys. F10, 2237 (1980)
K.Meier, H.Metz, D.Herlach, H.E.Schaefer, A.Seeger: Phys. Rev. Lett.39, 484 (1977)
K.Meier, M.Peo, S.Saile, H.E.Schaefer, A.Seeger: Philos. Mag. A40, 701 (1979)
R.P.Gupta, R.W.Siegel: J. Phys. F10, L7 (1980)
L.C.Smedskjaer, D.G.Legnini, R.W.Siegel: J. Phys. F10, L1 (1980)
L.C.Smedskjaer, MJ.Fluss, M.K.Chason, D.G.Legnini, R.W.Siegel: J. Phys. F9, 1815 (1979)
R. M.Nieminen, J.Laakkonen, P.Hautojärvi, A.Vehanen: Phys. Rev. B19, 1397 (1979)
H.Eyring, J.Walter, G.E.Kimball:Quantum Chemistry (John Wiley, New York 1949)
A.N.Goland, T.M.Hall: Phys. Lett. A45, 397 (1973)
W.Frank, A.Seeger: Appl. Phys.3, 61 (1974)
M.Doyama, R.Hasiguti: Cryst. Lattice Defects4, 139 (1973)
S.W.Tam, R.W.Siegel: J. Phys. F7, 877 (1977)
K.Kuribayashi, M.Doyama: J. Phys. F5, L92 (1975)
A.Seeger: Appl. Phys.4, 183 (1974)
R.N.West: InPositrons in Solids, ed. by P.Hautojärvi, Topics in Current Phys.12 (Springer, Berlin, Heidelberg, New York 1979)
C.H.Hodges: Phys. Rev. Lett.25, 284 (1970)
R.M.Nieminen, J.Laakkonen: Appl. Phys.20, 181 (1979)
B.Bergersen, T.McMullen: Solid State Commun.24, 421 (1977)
R.M.Nieminen, M.Manninen: InPositrons in Solids, ed. by P.Hautojärvi, Topics in Current Phys.12 (Springer, Berlin, Heidelberg, New York 1979)
M.J.Stott, P.Kubica: Phys. Rev. B11, 1 (1975)
I.K.MacKenzie, P.C.Lichtenberger: Appl. Phys.9, 3311 (1976)
M.Manninen, R.M.Nieminen, P.Hautojärvi, J.Arponen: Phys. Rev. B12, 4012 (1975)
T.M.Hall, A.N.Goland, C.L.Snead: Phys. Rev. B10, 3062 (1974)
R.P.Gupta, R.W.Siegel: Phys. Rev.22, 4572 (1980)
R.W.Siegel: J. Nucl. Mater.69–70, 117 (1978)
P.Hautojärvi, J.Johansson, A.Venhanen, J.Yli-Kauppila, J.Hillairet, P.Tzanetakis: Appl. Phys. (to be published)
I.K.MacKenzie: Phys. Rev. B16, 4705 (1977)
C.H.Hodges, M.J.Stott: Solid State Commun.12, 1153 (1973)
R.M.Nieminen, C.H.Hodges: Phys. Rev. B18, 2568 (1978)
A.P.Mills Jr., L.Pfeiffer: Phys. Rev. Lett.43, 1961 (1979)
R.M.Nieminen, J.Oliva: Phys. Rev. B22, 2226 (1980), and references therein
J.B.Pendry: J. Phys. C13, 1159 (1980)
G.Iche, Ph.Nozieres: J. Phys. (Paris)37, 1313 (1976)
A thermodynamic analysis of ps desorption which is similar in spirit to ours, has very recently been published by S.Chu, AP.Mills Jr., C.A.Murray: Phys. Rev. B23, 2060 (1981)