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On the origin of the intermediate component in the positron lifetime spectra in polymers

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Abstract

We have carried out an investigation of the nature of the ≈1 ns intermediate component in the positron time annihilation spectra of five polymers (atactic and isotactic polypropylene, polymethylmethacrylate, teflon, and polyethylene), using the magnetic quenching technique at high fields (1.5–3 T), coupled to lifetime spectroscopy. The results indicate that this component comes from the decay of a positron-electron bound system, different from that associated with the longest lifetime component. Therefore, two different Ps-like systems must be considered in the investigated polymers.

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Authors and Affiliations

  1. Istituto di Fisica del Politecnico, Piazza Leonardo da Vinci, 32, I-20133, Milano, Italy

    G. Consolati & F. Quasso

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  1. G. Consolati
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  2. F. Quasso
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Consolati, G., Quasso, F. On the origin of the intermediate component in the positron lifetime spectra in polymers. Appl. Phys. A 50, 43–48 (1990). https://doi.org/10.1007/BF00323953

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  • DOI: https://doi.org/10.1007/BF00323953

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