Positron trap states in amorphous and crystalline conjugated polydiacetylene polymers

K. C. Lim, W. F. Huang, Z. J. Xu, F. G. Yamagishi, M. A. Schen, T. C. Chung

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The temperature dependence of the lineshapes S(T) of the Doppler broadened annihilation radiation (DBAR) for polydiacetylenes, amorphous and polycrystalline poly(4BCMU) and crystalline poly(PTS) was investigated experimentally. Away from the transition temperatures dS(T)/T=0 for crystalline polymers, while a significant dS(T)/dT=0.0002/°C was measured for the amorphous polymer. A detailed analysis on the types of trap states that could account for such difference is presented.

Original languageEnglish (US)
Pages (from-to)164-168
Number of pages5
JournalPhysics Letters A
Volume142
Issue number2-3
DOIs
StatePublished - Dec 4 1989

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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