Α Alpha (al-fah) Β Beta (bay-tah) Γ Gamma (gam-ah) Δ Delta (del-tah) Ε Epsilon (ep-si-lon) Ζ Zeta (zay-tah) Η Eta (ay-tah) Θ Theta (thay-tah) Ι Iota (eye-o-tah) Κ Kappa (cap-pah ...

The thicker the substance, the more the radiation is absorbed. Alpha, beta and gamma radiations penetrate materials in different ways. Alpha radiation is the least penetrating. It can be stopped ...

After emitting an alpha or beta particle, the nucleus will often still be ‘excited’ and will need to lose energy. It does this by emitting a high energy electromagnetic wave called a gamma ray.