title: Cosmic-ray tracks in plastics: the apollo helmet dosimetry experiment.
abstract: Counts of tracks from heavy cosmic-ray nuclei in helmets from Apollo missions 8 and 12 show variations caused by solar modulation of the galactic cosmic-ray flux. Specific estimates of the biological damage to certain nonreplaceable cells by track-forming particles during these space missions indicate that the fraction of deactivated cells could range from a lower limit of 3 x 10(-7) to an upper limit of 1.4 x 10(-4).
authors.forename: G M
authors.initials: GM
authors.lastname: Comstock
authors.forename: R L
authors.initials: RL
authors.lastname: Fleischer
authors.forename: W R
authors.initials: WR
authors.lastname: Giard
authors.forename: H R
authors.initials: HR
authors.lastname: Hart
authors.forename: G E
authors.initials: GE
authors.lastname: Nichols
authors.forename: P B
authors.initials: PB
authors.lastname: Price