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Radiation Effects

Author(s): Ann R. Kennedy, PhD

DNA Damage

Iron ions, frequently used as the HZE particles, as well as other heavy ions, produce relatively large amounts of DNA damage, as their track width is considerably greater than that produced by x- and gamma radiations.

A major question in space radiation research concerns how the expected biological effects of space radiations can be minimized. Theoretically, it would seem possible to eliminate the effects of heavy ions through shielding methods. Shielding for heavy ion exposure, however, is extremely difficult as it is complicated by nuclear fragmentation, in which the secondary fragments produced from heavy ion interactions can be equally or more hazardous to biologic tissues than the original heavy ion.

Funded by the following grant(s)

National Space Biomedical Research Institute

National Space Biomedical Research Institute

This work was supported by National Space Biomedical Research Institute through NASA cooperative agreement NCC 9-58.