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The ray protection ray will interact with the substance when it encounters the substance, resulting in the weak intensity of the ray, which is related to the number and density of the substance. The larger the number and density of the substance, the stronger the attenuation ability of the ray. Theoretically, any material can be used to protect against radiation, but the amount of different, the number and density of lead are relatively large, is commonly used to protect against radiation
Neutron protection is designed to protect workers from or against neutron radiation. Unlike gamma ray protection, it must be made of light elements to slow down neutrons quickly. One of the slowing down ability is very good hydrogen containing substances, such as water, paraffin, and so on.

射線防護射線遇到物質(zhì)時會和物質(zhì)產(chǎn)生相互作用，結(jié)果導致射線的強度變?nèi)�，這個變?nèi)醯某潭群臀镔|(zhì)的 原 子序數(shù)和密度有關(guān)系， 原 子序數(shù)越大、密度越大，使射線衰減的能力越強。理論上，用任何物質(zhì)都可以去防護射線，但用量不同，鉛的 原 子序數(shù)和密度都比較大，是常用的防護射線的物質(zhì)
而中子防護是為保護工作人員不受或少受中 子 輻射而設(shè)置的防護物。它與γ射線防護不同，必須用輕元素制成，以使中子很快減速。其中慢化能力非常好的是含氫物質(zhì)，如水、石蠟等。