List of alpha emitting materials

The following are among the principal radioactive materials known to emit alpha particles.

• ²⁰⁹Bi, ²¹¹Bi, ²¹²Bi, ²¹³Bi
• ²¹⁰Po, ²¹¹Po, ²¹²Po, ²¹⁴Po, ²¹⁵Po, ²¹⁶Po, ²¹⁸Po
• ²¹⁵At, ²¹⁷At, ²¹⁸At
• ²¹⁸Rn, ²¹⁹Rn, ²²⁰Rn, ²²²Rn, ²²⁶Rn
• ²²¹Fr
• ²²³Ra, ²²⁴Ra, ²²⁶Ra
• ²²⁵Ac, ²²⁷Ac
• ²²⁷Th, ²²⁸Th, ²²⁹Th, ²³⁰Th, ²³²Th
• ²³¹Pa
• ²³³U, ²³⁴U, ²³⁵U, ²³⁶U, ²³⁸U
• ²³⁷Np
• ²³⁸Pu, ²³⁹Pu, ²⁴⁰Pu, ²⁴⁴Pu
• ²⁴¹Am
• ²⁴⁴Cm, ²⁴⁵Cm, ²⁴⁸Cm
• ²⁴⁹Cf, ²⁵²Cf