Abstract High-energy heavy ions in the galactic cosmic radiation (HZE particles) may pose a special risk during long term manned space flights outside the sheltering confines of the earth's geomagnetic field. These particles are highly ionizing, and they and their nuclear secondaries can penetrate many centimeters of body tissue. The three dimensional patterns of ionizations they create as they lose energy are referred to as their track structure . Several models of biological action on mammalian cells attempt to treat track structure or related quantities in their formulation. The methods by which they do this are reviewed. The proximity function is introduced in connection with the theory of Dual Radiation Action (DRA). The ion-gamma kill (IGK) model introduces the radial energy-density distribution, which is a smooth function characterizing both the magnitude and extension of a charged particle track. The lethal, potentially lethal (LPL) model introduces λ, the mean distance between relevant ion clusters or biochemical species along the track. Since very localized energy depositions (within ∼ 10 nm) are emphasized, the proximity function as defined in the DRA model is not of utility in characterizing track structure in the LPL formulation.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Track structure in biological models


    Beteiligte:
    Curtis, S.B. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 6 , 11 ; 179-185


    Erscheinungsdatum :

    01.01.1987


    Format / Umfang :

    7 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Particle Track Structure and Biological Implications

    Goodhead, Dudley T. | Springer Verlag | 2021



    Twin Track Models

    Schramm, Dieter / Hiller, Manfred / Bardini, Roberto | Springer Verlag | 2017


    Single Track Models

    Schramm, Dieter / Hiller, Manfred / Bardini, Roberto | Springer Verlag | 2017


    Twin Track Models

    Schramm, Dieter / Hiller, Manfred / Bardini, Roberto | Springer Verlag | 2014