Space charges in ethylene-styrene copolymers irradiated by low-dose gamma rays

Yasuhiro Tanaka, Yuuichi Mita, Yoshimichi Ohki, Hiroshi Yoshioka, Masaaki Ikeda, Fumihiko Yazaki

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    Space charges in ethylene-styrene copolymers irradiated by low dose γ rays were studied from the results of DC conduction, thermal pulse current, thermally stimulated current and residual voltage measurements. The number of carriers induced by γ rays and escaping from recombination becomes smaller with an increase in styrene content. The reason for this is thought to be that styrene absorbs the energy of electrons and increases the average energy necessary for ionization. The relationship between γ-induced space charges and the morphological state of styrene is also studied in three kinds of polymers (random and graft copolymers and polymer blend). It can be said that styrene must be dispersed uniformly and bonded with ethylene in order to fully utilize the electron energy absorption effect of a benzene ring.

    Original languageEnglish
    Pages (from-to)1491-1496
    Number of pages6
    JournalJournal of Physics D: Applied Physics
    Volume23
    Issue number12
    DOIs
    Publication statusPublished - 1990

    Fingerprint

    Styrene
    Electric space charge
    styrenes
    Gamma rays
    Dosimetry
    space charge
    copolymers
    Ethylene
    ethylene
    Copolymers
    gamma rays
    dosage
    Graft copolymers
    rays
    Electrons
    Voltage measurement
    Energy absorption
    Polymer blends
    Benzene
    polymer blends

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Cite this

    Space charges in ethylene-styrene copolymers irradiated by low-dose gamma rays. / Tanaka, Yasuhiro; Mita, Yuuichi; Ohki, Yoshimichi; Yoshioka, Hiroshi; Ikeda, Masaaki; Yazaki, Fumihiko.

    In: Journal of Physics D: Applied Physics, Vol. 23, No. 12, 1990, p. 1491-1496.

    Research output: Contribution to journalArticle

    Tanaka, Yasuhiro ; Mita, Yuuichi ; Ohki, Yoshimichi ; Yoshioka, Hiroshi ; Ikeda, Masaaki ; Yazaki, Fumihiko. / Space charges in ethylene-styrene copolymers irradiated by low-dose gamma rays. In: Journal of Physics D: Applied Physics. 1990 ; Vol. 23, No. 12. pp. 1491-1496.
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