Experimental Verification of the Blob Model and Delayed Formation of Ps

• Authors: C. Dauwe , B. Van Waeyenberge , J. De Baerdemaeker
• Languages of publication: EN

Abstracts

EN

Stepanov and Byakov's blob model for the formation of positronium can be considered as an extension of the spur model. However, it offers many extra possibilities and is more sound from the radiation chemistry point of view. A full coding of this model leads to non-exponential lifetime spectra, and standard multi-component analysis is no longer adequate for materials such as polymers. Age momentum correlation experiments were performed on linear PMMA at different temperatures and were analyzed with the non-exponential blob model. We show the adequacy of this model, and moreover an alternative explanation for the young-age broadening and delayed formation of positronium.

Keywords

EN

36.10.Dr; 78.70.Bj; 61.80.Fe; 82.35.Lr

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 82.35.Lr: Physical properties of polymers
• 36.10.Dr: Positronium(see also 82.30.Gg Positronium chemistry)
• 61.80.Fe: Electron and positron radiation effects

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 107
• Issue: 4
• Pages: 623-628

Dates

published

2005-04

received

2004-09-20

Contributors

author

C. Dauwe

• Dpt. Subatomic and Radiation Physics, Ghent University, Proeftuinstraat 86, 9000, Gent, Belgium

author

B. Van Waeyenberge

• Dpt. Subatomic and Radiation Physics, Ghent University, Proeftuinstraat 86, 9000, Gent, Belgium

author

J. De Baerdemaeker

• Dpt. Subatomic and Radiation Physics, Ghent University, Proeftuinstraat 86, 9000, Gent, Belgium

References

• 1. C. Dauwe, B. Van Waeyenberge, J. De Baerdemaeker, Mater. Sci. Forum. 445-446. 229, 2004
• 2. V.M. Byakov, S.V. Stepanov, J. Radioan. Nucl. Chem.. 210, 371, 1996
• 3. S.V. Stepanov, V.M. Byakov, Principles and Applications of Positron and Positronium Chemistry, Eds. Y.C. Jean, P.E. Mallon, D.M. Schrader, World Scientific, Singapore 2003, p. 117
• 4. H. Stoll, M. Koch, K. Maier, J. Major, Nucl. Instrum. Methods Phys. Res. B. 56. 582, 1991
• 5. C. Dauwe, B. Van Waeyenberge, N. Balcaen, Phys. Rev. B. 68, 132202, 2003
• 6. G. Dlubek, Ch. Hubner, S. Eichler, Nucl. Instrum. Methods Phys. Res. B. 142. 191, 1998
• 7. H. Stoll, P. Castellaz, A. Siegle, in Ref. [3], p. 362
• 8. H. Stoll, P. Castellaz, S. Koch, J. Major, H. Schneider, A. Seeger, Mater. Sci. Forum. 255-257, 92, 1997
• 9. T. Hirade, Mater. Sci. Forum. 445-446. 234, 2004

Identifiers

DOI

10.12693/APhysPolA.107.623