| Autor: |
Pietrow, Marek |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Phys. Chem. Chem. Phys., 2015, 17, 27726 - 27733 |
| Druh dokumentu: |
Working Paper |
| Popis: |
A numerical program calculating an energy of a positron or (and) an electron near the free volume in solid n-alkanes has been build. The theory of interaction of e+ or (and) e- with this non-polar media based on polarizability has been introduced. The energy of the e+ -- e- pair in the bulk was compared to that calculated when the pair forms a positronium (Ps) inside the free volume. The calculations are based on the Coupled Dipole Method and the dipole-dipole interaction energy for induced dipoles is taken into account. Furthermore, a correction of a local permittivity for the e+ -- e- interaction is calculated taking into account the non-isotropic medium between them. The method is a step toward more accurate calculations of energetic conditions during the Ps formation in matter. The possibility of emission of the excess energy of the Ps formation as electromagnetic radiation is discussed. It is argued that if this radiation is observed, it can be used as a new spectroscopic tool providing information about microscopic properties of media. |
| Databáze: |
arXiv |
| Externí odkaz: |
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