Aluminium alloy

Here is good news for long-term spacecraft: aluminium that stops radiation. And the researchers posted the whole paper!

Aluminium is all over the place on the Moon and, I think, also Mars; for ice moons (like Ganymede) we'd look in craters. These three worlds get plenty rad... but won't need aluminium to stop it. Permanent habitats will likely go underground. Above ground, in the 1.428-3.711 g range (against Earth 9.8), good ol' steel and glass should hold up at least as well as any thin aluminium alloy. And this alloy might be expensive to produce. Lastly, I can see a lot of freight from Mars and our Moon being lifted off by Orion rockets where we don't give a sh!t, we line everything in lead.

UPDATE 3/14/21: the word "Bremsstrahlung" isn't in the paper but it does refer to protons from the Sun.

This finding is for delta-V; for transport. Long-term every gram counts and, also, we need to protect our astronauts. Also for such orbiting stations where we'd fine-tune the orbit as time goes by. I am looking at the metastable Libration-Points here, especially those not in shadow: L1, L3. Solar-polar also.