Journal
Article title
Authors
Title variants
Languages of publication
Abstracts
For the first time positronium is investigated in fine powders of MgO and Al_2O_3 using age-momentum correlation technique based on a relativistic positron beam. The application of this technique for investigating the interaction of positronium with the grain surfaces is discussed and compared with other techniques. The previously reported interaction of the positronium with paramagnetic centres is further studied. A qualitative interpretation of the spectra is given. In the Al_2O_3 samples we found some unexpected behaviour of the conversion quenching of ortho-positronium at irradiation induced paramagnetic surface defect.
Discipline
Journal
Year
Volume
Issue
Pages
707-715
Physical description
Dates
published
2001-11
received
2001-05-14
Contributors
author
- NUMAT, Department of Subatomic and Radiation Physics, Ghent University, Proeftuinstraat 86, 9000 Gent, Belgium
author
- NUMAT, Department of Subatomic and Radiation Physics, Ghent University, Proeftuinstraat 86, 9000 Gent, Belgium
References
- 1. W.C. Sauder, J. Res. Natl. Bur. Stand. Sect. A, 72, 91, 1968
- 2. T. Chang, M. Xu, X. Zeng, Phys. Lett. A, 126, 189, 1987
- 3. Y. Nagashima, M. Kakimoto, T. Hyodo, K. Fujiwara, A. Ichimura, T. Chang, J. Deng, T. Akahane, T. Chiba, K. Suzuki, B.T.A. McKee, A.T. Stewart, Phys. Rev. A, 52, 258, 1995
- 4. C. Dauwe, T. Van Hoecke, D. Segers, in: Proc. XXX Zakopane School of Physics, Eds. K. Tomala, E.A. Gorlich, Institute of Physics, Jagiellonian University and H. Niewodniczański Institute of Nuclear Physics, Kraków 1995, p. 275
- 5. M. Skalsey, J.J. Engbrecht, R.K. Bithell, R.S. Vallery, D.W. Gidley, Phys. Rev. Lett., 80, 3727, 1998
- 6. S. Takada, T. Iwata, K. Kawashima, H. Saito, Y. Nagashima, T. Hyodo, Radiat. Phys. Chem., 58, 781, 2000
- 7. Mbungu-Tsumbu, C. Dauwe, M.D. Diatezwa, L. Mbosei, K. Motoko, Appl. Phys. A, 48, 343, 1989
- 8. C. Dauwe, Mbungo-Tsumbu, Phys. Rev. B, 45, 9, 1992
- 9. C. Dauwe, B. Van Waeyenberge, D. Segers, T. Van Hoecke, J. Kuriplach, J. Radioanal. Nucl. Chem., 210, 293, 1996
- 10. H. Saito, Y. Nagashima, T. Hyodo, T. Chang, Phys. Rev. B, 52, 689, 1995
- 11. H. Saito, T. Hyodo, Phys. Rev. B, 60, 11070, 1991
- 12. B. Van Waeyenberge, C. Dauwe, H. Stoll, Mater. Sci. Forum, 363-365, 401, 2001
- 13. M. Charlton, J.W. Humberston, Positron Physics, Cambridge University Press, Cambridge 2001, p. 328
- 14. S. Hara, P.A. Fraser, J. Phys. B, At. Mol. Phys., 8, L472, 1975
- 15. M. Kakimoto, T. Hyodo, T. Chiba, T. Akahane, T.B. Chang, J. Phys. B, At. Mol. Phys., 20, L107, 1987
- 16. M. Kakimoto, T. Hyodo, T.B. Chang, J. Phys. B, At. Mol. Phys., 23, 589, 1990
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv100n520kz