Beta ray and Particulate radiation

Beta ray noun - Radiation of beta particles during radioactive decay.

Particulate radiation and beta ray are semantically related. In some cases you can use "Particulate radiation" instead a noun phrase "Beta ray".

Particulate radiation noun - A stream of atomic or subatomic particles that may be charged positively (e.g. alpha particles) or negatively (e.g. beta particles) or not at all (e.g. neutrons).

Beta ray and particulate radiation are semantically related. Sometimes you can replace phrase "Beta ray" with "Particulate radiation", this phrases are similar.