AbstractShielding is the only countermeasure currently available for exposure to cosmic radiation during space travel. We compared aluminum (Al) and polymethylmethacrylate (PMMA, or lucite) shields of 20g/cm2 thickness using 1GeV protons accelerated at the NASA Space Radiation Laboratory. The dose rate increased after the shield, and the increase was more pronounced after the Al than the PMMA shield. No significant differences in the induction of chromosomal aberrations were observed in human lymphocytes exposed to the same dose with no shield or behind the Al and PMMA blocks. However, the biological effectiveness per incident proton was increased by the shields. Simulations using the General-Purpose Particle and Heavy-Ion Transport Code System (PHITS) show that the increase in dose is caused by target fragments, and aluminum produces more secondary protons than PMMA. Nevertheless, the spectrum of particles behind the shield is confined within the low-LET region, and the biological effectiveness is consequently similar.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Comparison of aluminum and lucite for shielding against 1GeV protons


    Beteiligte:
    Mancusi, D. (Autor:in) / Bertucci, A. (Autor:in) / Gialanella, G. (Autor:in) / Grossi, G. (Autor:in) / Manti, L. (Autor:in) / Pugliese, M. (Autor:in) / Rusek, A. (Autor:in) / Scampoli, P. (Autor:in) / Sihver, L. (Autor:in) / Durante, M. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 40 , 4 ; 581-585


    Erscheinungsdatum :

    2006-11-29


    Format / Umfang :

    5 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch






    Shielding of Manned Space Vehicles Against Protons and alpha Particles

    R. G. Alsmiller / R. T. Santoro / J. Barish et al. | NTIS | 1972



    Characterization of circumferential modes of a lucite cylinder immersed in water

    Chati, F. / Leon, F. / Maze, G. et al. | British Library Conference Proceedings | 1998