| Alpha radiation is the stream of alpha particles emitted when radioactive materials disintegrate. |
| Atomic number 101 is a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles. |
| The radioactive material generates ionising radiations, which include alpha particles, beta particles, X-rays and gamma rays. |
| In 1903 he invented the spinthariscope to detect alpha particles emitted by radioactive elements. |
| This was used on his electroscopes and on his ionisation chambers for the work that he did with alpha particles. |
| The major disadvantage of thoria are the environmental issues due to the exposure to the alpha particles emitted by thorium. |
