Because neutrons are uncharged, they are more penetrating than alpha radiation or beta radiation. In some cases they are more penetrating than gamma radiation, which is impeded in materials of high atomic number.

I did not know that neutrons could penetrate farther than gamma rays by their virtue of being neutral. Also never heard gamma rays be called y-rays. Wonder what the z-rays will be if we ever name any.

[–] [email protected] 57 points 10 months ago

γ is the Greek letter gamma. Those are γ-rays, not y-rays.

[–] Proxima_Centauri11 35 points 10 months ago

The "y" you're seeing on the table is actually γ, or lower-case gamma!

[–] CptEnder 4 points 10 months ago

Did not know about the neutrons either as well as gamma rays having the same penetration as x-rays. Was always taught gamma radiation is insta toast no matter what kind of protection.