Fig. 4
From: Limitations in predicting the space radiation health risk for exploration astronauts
The intravehicular LET of the Space Shuttle. Displayed are the integrated LET/day values measured by Badhwar et al. 1998 (purple dotted line),11 as well as the LET of five single-ion exposures (290 MeV 14C (carbon), 600 MeV 16O (oxygen), 1 GeV 47Ti (titanium), 1 GeV 56Fe (iron), and 600 MeV 56Fe (iron)). As studies generally focus on a single, mono-energetic radiation exposure, this figure highlights the lack in breadth of energies or radiation field complexity used in current radiobiological studies. Data adapted from Badhwar et al. 199811
