Interpretation: Electron and positron should be explained.
Particle- A beta particle can be a high energy, high speed, electron or a positron (electron with a positive charge).
The positron -- an antiparticle to the electron -- is much lighter, and has no known internal structure. It doesn't interact with nucleons via the strong force to my knowledge; and if it absorbs an electron, they both annihilate in an antimatter reaction, producing only light/photons.
To differentiate: Electron and positron