It has been known for some time that adequate assessment of spacecraft requirements and concomitant estimates of astronaut radiation exposures from galactic cosmic radiation requires accurate, quantitative methods for characterizing these radiation fields as they pass through thick absorbers. The main nuclear interaction processes involved are nuclear elastic an inelastic collisions, and nuclear breakup (fragmentation) and electromagnetic dissociation (EMD). Nuclear fragmenation and EMD are important because they alter the elemental and isotopic composition of the transported radiation fields. At present, there is no suitable accurate theory for predicting nuclear fragmentation cross sections for all collision pairs and energies of interest in space radiation protection. Typical cross-section differences between theory and experiment range from about 25 percent to a factor of two. The resulting errors in transported flux, for high linear energy transfer (LET) particles, are compared to these cross-sections errors. In this overview, theoretical models of heavy ion fragmentation currently used to generate input data bases for cosmic-ray transport and shielding codes are reviewed. Their shortcomings are discussed. Further actions needed to improve their accuracy and generality are presented.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Overview of nuclear fragementation models and needs


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    1996-01-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Overview of Nuclear Fragmentation Models and Needs

    Townsend, L.W. | Online Contents | 1996


    Overview of Nuclear Fragmentation Models and Needs

    Townsend, L. W. / Cucinotta, F. A. / COSPAR; Scientific Commission F | British Library Conference Proceedings | 1995


    Overview of Nuclear Fragmentation Models and Needs

    Townsend, L.W. | Online Contents | 1995


    Memory Overview - Technologies and Needs

    LaBel, Kenneth A. | NTRS | 2010


    DDL Overview and Reconnaissance Needs

    Trawny, Nikolas / Skulsky, David / Garner, Greg | NTRS | 2018