A Can any thin materials protect a Mars spacecraft from gamma rays?

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Astronauts on long-duration missions to Mars will require effective protection against gamma rays, which pose significant health risks during extended space travel. Shorter missions have not shown serious effects, but a six-month journey raises concerns about radiation exposure. Traditional shielding methods, like thick lead barriers, are impractical for spacecraft design. Alternative materials, such as advanced radiation shields made from fiber metal laminates, may offer viable solutions. The discussion highlights the need for further research into innovative protective materials for deep space missions.
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Seeking a thin and effective material to protect a Mars spacecraft and its occupants from destructive effects of gamma rays.
Astronauts heading towards Mars (and hopefully return) will need protection against the harmful effects of gamma rays in space for this long trip. Apparently, much shorter trips have not caused enough bodily harm to be of much concern. However, a 6-month or longer trip might be a real problem. I haven't found any articles yet that discuss this problem in depth.

It's impractical to cover such a craft with a 1 foot (or more) thick lead shied, but perhaps a material exists, or can be constructed, to solve this problem --- something like "Atomic Number (Z)-Grade Radiation Shields from Fiber Metal Laminates" described at https://technology.nasa.gov/patent/LAR-TOPS-201 .

Any suggestions or recommendations?
 
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Why do you think its gamma ray protection that is important (or important at all)?
The reason why you have not found any information about it is perhaps a hint...
 
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