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2001 | 99 | 3-4 | 399-406
Article title

Positrons and Positroniu m in Grainy and Porous Solids

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EN
Abstracts
EN
Systematic investigations have been performed using positron annihilation techniques on micrograins of crystalline powders (e.g., MgO, Al_2O_3, SiO_2) and on various zeolites (e.g., silicalite 1, Na-X, Na-Y, ZSM-5, mordenite) aiming at a better under standing of the formation and decay of the long-lived ortho-positronium states. The techniques were lifetime spectroscopy, Doppler-effect measurements and the recording of the full energy distribution of the annihilation radiation. The influences of heat treatment, sample evacuation and presence of gases were investigated. Lifetimes over 130 ns and o-Ps fractions of about 30% were found. A strong correlation of positron annihilation technique data with a water content of the samples was evidenced. Possible pictures of the formation and decay of ortho-positronium in porous media are discussed.
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Contributors
author
  • KFKI Res. Inst. for Part. Nucl. Physics, P.O.B. 49, 1525 Budapest 114, Hungary
author
  • KFKI Res. Inst. for Part. Nucl. Physics, P.O.B. 49, 1525 Budapest 114, Hungary
author
  • Lab. Chim. Nucléaire, IReS, IN2P3, CNRS, BP. 28, 67037 Strasbourg Cedex 2, France
author
  • KFKI Res. Inst. for Part. Nucl. Physics, P.O.B. 49, 1525 Budapest 114, Hungary
author
  • Inst. of Isotope and Surface Chemistry, P.O.B. 77, 1525 Budapest, Hungary
  • Centr. Res. Inst. for Chemistry, P.O.B. 19, 1525 Budapest, Hungary
author
  • Centr. Res. Inst. for Chemistry, P.O.B. 19, 1525 Budapest, Hungary
author
  • KFKI Res. Inst. for Part. Nucl. Physics, P.O.B. 49, 1525 Budapest 114, Hungary
author
  • Lab. Mat. Minéraux, URA CNRS 428, 3 rue A. Werner, 68093 Mulhouse Cedex, France
author
  • Lab. Mat. Minéraux, URA CNRS 428, 3 rue A. Werner, 68093 Mulhouse Cedex, France
References
  • 1. R. Paulin, G. Ambrosino, C. R. Acad. Sci. Paris, 263, 207, 1966
  • 2. M.B. Perkal, W.B. Walters, J. Chem. Phys., 53, 190, 1970
  • 3. V.I. Goldanskii, A.D. Mokrushin, A.O. Tatur, V.P. Shantarovich, Appl. Phys., 5, 379, 1975
  • 4. H. Nakanishi, Y. Ujihira, J. Phys. Chem., 86, 4446, 1982
  • 5. K. Venkateswaran, K.L. Cheng, Y.C. Jean, J. Phys. Chem., 89, 3001, 1985
  • 6. K. Venkateswaran, K.L. Cheng, Y.C. Jean, Chem. Phys. Letts., 126, 33, 1986
  • 7. M. Debowska, J.Ch. Abbé, G. Duplâtre, Phys. Status Solidi B, 146, 91, 1988
  • 8. Y. Ito, T. Takano, M. Hasegawa, Appl. Phys. A, 45, 193, 1988
  • 9. Y. Ito, M. Hirose, T. Tabata, M. Hasegawa, Appl. Phys. A, 50, 39, 1990
  • 10. M. Debowska, K. Jerie, Mater. Sci. Forum, 105-110, 1533, 1992
  • 11. Ch. Dauwe, Mater. Sci. Forum, 105-110, 1857, 1992
  • 12. Zs. Kajcsos, L. Liszkay, L. Varga, K. Lázár, G. Brauer, C. Dauwe, Mater. Sci. Forum, 175-178, 959, 1995
  • 13. L. Liszkay, C. Corbel, L. Baroux, P. Hautojarvi, M. Bayhan, A.W. Brinkman, S. Tatarenko, Appl. Phys. Lett., 64, 1380, 1994
  • 14. G. Duplâtre, Zs. Kajcsos, I. Billard, L. Liszkay, K. Lázár, L. Lohonyai, H.K. Beyer, P. Caullet, J. Patarin, in: Studies in Surface Science and Catalysis, Eds. I. Kiricsi, G. Pál-Borbély, J.B. Nagy, H.G. Karge, Vol. 125, Elsevier, Amsterdam 1999, p. 277
  • 15. M. Eldrup, D. Lightbody, J.N. Sherwood, Chem. Phys., 63, 51, 1981
  • 16. T. Goworek, B. Jasinska, J. Wawryszczuk, K. Ciesielski, J. Goworek, in: Studies in Surface Science and Catalysis, Eds. K.K. Unger, G. Kreysa, J.P. Baselt, Vol. 128, Elsevier, Amsterdam 2000, p. 557
  • 17. L. Liszkay, Zs. Kajcsos, G. Duplâtre, K. Lázár, G. Pál-Borbély, H.K. Beyer, Mater. Sci. Forum, in press
  • 18. K. Lázár, B.M. Choudary, L. Guczi, Hyperfine Interact., 46, 591, 1989
  • 19. K. Lázár, A.N. Kotasthane, P. Fejes, Catalysis Lett., 57, 171, 1999
  • 20. Zs. Kajcsos, G. Duplâtre, L. Varga, I. Billard, L. Liszkay, L. Lohonyai, P. Caullet, J. Patarin, K. Lázár, Mater. Sci. Forum, 255-257, 405, 1997
Document Type
Publication order reference
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv99n314kz
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