Alpha radiation and Ionizing radiation

Alpha radiation noun - The radiation of alpha particles during radioactive decay.

Ionizing radiation and alpha radiation are semantically related. In some cases you can use "Ionizing radiation" instead a noun phrase "Alpha radiation".

Ionizing radiation noun - High-energy radiation capable of producing ionization in substances through which it passes.

Alpha radiation and ionizing radiation are semantically related. Sometimes you can replace phrase "Alpha radiation" with "Ionizing radiation", this phrases are similar.