Abstract The biological effectiveness of radiations depends on the spatial pattern of ionizations and excitations produced by the charged particle tracks involved. Ionizations produced by both the primary ion and by energetic delta rays may contribute to the production of biologically relevant damage and to the concentration of damage which may effect the probability of repair. Although average energy concentration (dose) can be calculated using homogeneous track models, the energy is actually concentrated in small volumes containing segments of the ion and delta ray tracks. These local concentrations are studied experimentally using low pressure proportional counters, and theoretically, using Monte Carlo methods. Small volumes near an ion track may be traversed by a delta ray. If they are, the energy deposited will be similar to that produced by a single electron track in a low-energy x-ray irradiation. The probability of a delta ray interaction occurring decreases with the square of the radial distance from the track. The average energy deposited is the product of this probability and the energy deposited in an interaction. Average energy deposited calculated from measured interaction probability is in good agreement with the results of homogeneous track models.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Microdosimetric measurements of heavy ion tracks


    Beteiligte:
    Braby, L.A. (Autor:in) / Metting, N.F. (Autor:in) / Wilson, W.E. (Autor:in) / Toburen, L.H. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 12 , 2-3 ; 23-32


    Erscheinungsdatum :

    1991-01-01


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Microdosimetric considerations of effects of heavy ions on microorganisms

    Takahashi, T. / Yatagai, F. / Konno, S. et al. | Elsevier | 1987


    A Generalized Microdosimetric Dose Response Model

    Shirin Rahmanian / Tony C Slaba / Floriane Poignant | NTRS


    Microdosimetric considerations of effects of heavy ions on E. coli K-12 mutants

    Takahashi, T. / Yatagai, F. / Izumo, K. | Elsevier | 1991


    More Durable Tracks for Heavy Vehicles

    Collins, Earl R., Jr. | NTRS | 1987


    12 speed Transmission for Heavy-duty Tracks

    Hino Motors Ltd. Power train research & development division / Nihon Junkatsu Gakkai; Nihon Jidosha Kogyokai | British Library Conference Proceedings | 2005