An eight inch thick lead shield.
gamma rays can be stop by lead block
It seems that any matter will stop part of the gamma rays; to stop most of the gamma rays from passing, you would need a fairly thick layer of matter. The thickness required to block half of the gamma rays depends on the energy of the gamma rays. Just about any matter will do. For more details, check the Wikipedia article "Gamma ray", section "Shielding".
yes it can stop it
No. An alpha particle can
no
Gamma rays are gamma rays are gamma rays.
Gamma rays, if strong enough, can cause cancer if you are around them too much. There are methods to stop it, though, but gamma rays are hard to prevent. They can be really unhealthy to the human body.
The answer is gamma rays.
Gamma Rays
Gamma rays can penetrate just about any type of matter. It takes meters of thick material to shield people from gamma rays.
Mainly lead and very thick clothing,
no gamma rays are the best