A good thickness of lead.
Miles of lead and concrete would be ultimate protection against gamma rays.
Concrete, lead
Several feet of concrete
A few inches of lead
no gamma rays are the best
Lead is commonly used to provide the best protection against gamma rays. Lead's high density and atomic number make it an effective material for absorbing and blocking gamma radiation. Thick barriers of lead are often used in medical facilities and nuclear power plants to shield workers from gamma rays.
Materials with high atomic numbers, such as lead or concrete, are effective at shielding against gamma rays due to their ability to absorb and scatter the radiation. Thick layers of these materials are commonly used in the construction of shielding barriers to protect against gamma ray exposure. Lead is often preferred for its high density and effectiveness in blocking gamma rays.
A very thick piece of metallic Lead(Pb)
Several feet of concrete or few inches of lead.
Several feet of concrete or a few inches of lead.
Lead and concrete are effective materials that can block gamma rays and protect against their harmful effects.
Several feet of concrete or a few inches of lead