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Electron traps in long-chain alkanes

Treść / Zawartość
Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Positron lifetime spectra in long-chain alkanes were measured at various wavelengths of light illuminating the samples as a function of temperature, storage time. It was found that in n-alkanes with carbon chain longer than 30 atoms two kinds of electron traps exist; the depth of shallower of them is less than 0.52 eV. They are discharged already at a temperature of 120 K.
Czasopismo
Rocznik
Strony
51--55
Opis fizyczny
Bibliogr. 16 poz., rys.
Twórcy
autor
  • Institute of Physics, Maria Curie-Skłodowska University, 1 M. Curie-Skłodowskiej Sq., 20-031 Lublin, Poland, Tel.: +48 81 537 6261, Fax: +48 81 537 6191
Bibliografia
  • 1. Ekstrom A, Suenram R, Willard JE (1970) Further studies on the properties of electrons trapped in glassy hydrocarbons. J Phys Chem 74:1888–1894
  • 2. Goworek T, Zaleski R, Wawryszczuk J (2003) Temperature, pressure and source-irradiation effects in positronium formation in some long-chain alkanes. Chem Phys 295:243–253
  • 3. Hirade T, Maurer FHJ, Eldrup M (2000) Positronium formation at low temperatures: role of trapped electrons. Radiat Phys Chem 58:465–471
  • 4. Ito Y, Hirade T, Hamada E, Suzuki T, Ito Y (1999) The effect of visible light irradiation on positronium formation in polyethylene at low temperature. Acta Phys Pol A 95:533–538
  • 5. Kansy J (1996) Microcomputer program for analysis of positron annihilation lifetime spectra. Nucl Instrum Methods Phys Res A 374:235–244
  • 6. Kayser RM, Williams F (1968) Characterization of trapped electrons in γ-irradiated hydrocarbon polymers by electron spin resonance and optical absorption methods. J Phys Chem 73:1623–1624
  • 7. Lightbody D, Sherwood JN, Eldrup M (1985) Temperature and phase dependence of positron lifetimes in solid cyclohexane. Chem Phys 93:475–484
  • 8. Malhotra BD, Pethrick RA (1983) Positron annihilation studies of the glass-rubber transition in poly(alkylmethacrylates). Macromolecules 16:1175–1179
  • 9. Sharma SC (1988) Positron and positronium annihilation in gases. In: Schrader DM, Jean YC (eds) Positron and positronium chemistry. Elsevier, Amsterdam, Chapter 6
  • 10. Shirom M, Willard JE (1968) Saturation and removal of electron trapping sites in hydrocarbon glasses. J Am Chem Soc 90:2184–2185
  • 11. Stepanov SV, Byakov VM (2003) Physical and radiation chemistry of the positron and positronium. In: Jean YC, Mallone PE, Schrader DM (eds) Principles and applications of positrons and positronium chemistry. World Scientific Publications, Singapore, pp 117–151
  • 12. Suzuki N, Hirade T, Saito F, Hyodo T (2003) Positronium formation reaction of trapped electrons and free positrons: delayed formation studied by AMOC. Radiat Phys Chem 68:647–649
  • 13. Turner WR (1971) Normal alkanes. Ind Eng Chem Prod Res Develop 10:238–260
  • 14. Wang CL, Hirade T, Maurer FHJ, Eldrup M, Pedersen NJ (1998) Free volume distribution and positronium formation in amorphous polymers: temperature and positron irradiation-time dependence. J Chem Phys 108:4654–4661
  • 15. Yu Z, Yashi U, McGervey JD, Jamieson AM, Simha R (1994) Molecular weight dependence of free volume in polystyrene studied by positron annihilation measurements.J Polym Sci B 32:2637–2644
  • 16. Zgardzińska B, Goworek T (2009) Positronium in the n-alkane binary mixture: nonadecane-heneicosane. Chem Phys Lett 470:72–74
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ7-0014-0011
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