21. Beta particles are electrons or positrons and can travel farther than alpha particles in air.22. In some of these cases of disintegration, beta particles ( electrons ) may be released. 23. A second blackout effect is caused by the emission of beta particles from the fission products. 24. I know how CRT monitors work and I also think I know what beta particles are. 25. Beta particles are high energy electrons or positrons.26. To monitor beta particle emission, the filters use various densities of plastic or even label material. 27. Beta particles have much greater penetrating power through tissues than do the much heavier alpha particles.28. The first beta decays are rapid and may release high energy beta particles or gamma radiation. 29. The cobalt-60 then decays by the emission of a beta particle plus gamma rays into nickel-60. 30. Radium 228 emits beta particles , and is also a concern for human health through inhalation and ingestion.