The 210-day trip on Mars results in radiation exposure of the crew of 386 +/- 61 mSv. On the surface, they will be exposed to about 11 mSv per year during their excursions on the surface of Mars. This means that the settlers will be able to spend about sixty years on Mars before reaching their career limit, with respect to ESA standards. In this way, radiation protection for scientific research is very important for scientist.
According to studying, which shows that tungsten material has a high density 65% denser than lead and 130% denser than steel, if the material goes denser, then the radiation absorption ability will be better.
We could get the calculation from the following formula:
Formula: K = e0.693 d / △1/2
K: Shield weakened multiple
△ 1/2: The shielding material of the half-value layer values
d: Shielding thickness, with the half-value layer thickness of their units, people need to half-value layer thickness of the quality of translation into the thickness of the material, divided by the density of the material can be obtained.
For more details, you could visit: http://www.tungsten-alloy.com/tungsten-alloy-radiation-shielding.html.
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