1. Shielding of bacterial spores against galactic cosmic radiation by meteorite material.
Shielding of bacterial spores against galactic cosmic radiation by meteorite material. The dashed line gives the annual dose profile (in Grays per year), which increases for the outer 10 cm due to secondary radiation and then decreases. The solid line gives the exposure time for a survival rate of 10−6 (survival of 100 spores from an initial population of 108 spores). (Data from reference 109.)‏
Wayne L. Nicholson et al. Microbiol. Mol. Biol. Rev. 2000; doi: /MMBR