What is a beta particle?
Beta particle
{'answer_start': array([73]), 'answer_text': array(['high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay'],
      dtype=object)}
A beta particle, also called beta ray or beta radiation (symbol β), is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay. There are two forms of beta decay, β− decay and β+ decay, which produce electrons and positrons respectively.[1]