This version (2021/09/14 10:26 ) is a draft.Anonimous)
Approvals: 0/1
The Previously approved version (2021/05/16 21:51) is available.Diff
Freefall 3358

Life problems in low gravity
[!0.987]2019-11-15

3358.png
How much shielding do we have?
Well, shielding is a little complicated. Higher energy gamma rays have more penetrating power. The thumb rule is 5 cm of lead, 10 cm of steel, or 120 cm of water is one ten-thickness.
A ten-thickness is the amount of material needed to reduce the radiation level to one tenth of the unshielded value.
100 gray, 6 MeV source
5 cm of lead
Radiation level: 10 gray
5 cm of lead
Radiation level: 1 gray
Wow. That much material wrapped around a spaceship would be heavy… and expensive to accelerate… and we don't have much shielding, do we?


Color by George Peterson

This website uses cookies. By using the website, you agree with storing cookies on your computer. Also you acknowledge that you have read and understand our Privacy Policy. If you do not agree leave the website.More information about cookies