Polarization of positronium in amorphous polar polymers: A case study
Journal Article
·
· Journal of Chemical Physics
- Department of Aerospace Science and Technology, Politecnico di Milano, via La Masa, 34, Milano 20156 (Italy)
The features of positronium in an amorphous copolymer (polyvinyl acetate-crotonic acid) in a range of temperatures including the glass transition were investigated by means of positron annihilation lifetime spectroscopy. In particular, para-positronium lifetime was found to be longer than in a vacuum and to decrease with the temperature. This was attributed to the electron density at the positron (contact density), which is lower than in vacuo due to the presence of polar groups in the copolymer. A three quantum yield experiment confirmed the lifetime results.
- OSTI ID:
- 22251371
- Journal Information:
- Journal of Chemical Physics, Vol. 139, Issue 20; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
Similar Records
Free volume in imidazolium triflimide ([C{sub 3}MIM][NTf{sub 2}]) ionic liquid from positron lifetime: Amorphous, crystalline, and liquid states
LONG LIFETIME OF POSITRONIUM IN LIQUID HELIUM
Three-photon annihilation of ortho-positronium in argon gas
Journal Article
·
Tue Sep 28 00:00:00 EDT 2010
· Journal of Chemical Physics
·
OSTI ID:22251371
+5 more
LONG LIFETIME OF POSITRONIUM IN LIQUID HELIUM
Journal Article
·
Tue Oct 15 00:00:00 EDT 1957
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
·
OSTI ID:22251371
Three-photon annihilation of ortho-positronium in argon gas
Journal Article
·
Thu Mar 01 00:00:00 EST 1973
· Can. J. Phys., v. 51, no. 5, pp. 537-548
·
OSTI ID:22251371