Rheumatoid arthritis (RA) is the second most common type of arthritis, affecting around 1.5 million Americans. A systemic autoimmune disease, it mainly attacks the synovial joints: the hands and wrists, shoulders, elbows, knees, ankles, feet, and toes.
Beta radiation, consisting of electrons or positrons, is halted by an aluminum plate. Gamma radiation is damped by lead. Beta particles are high-energy, high-speed electrons or positrons emitted by certain types of radioactive nuclei, such as potassium-40. The beta particles emitted are a form of ionizing radiation also known as beta rays. The production of beta particles is termed beta decay. They are designated by the Greek letter beta (Î²). There are two forms of beta decay, Î² â and Î² + , which respectively give rise to the electron and the positron.
Beta Decay. Beta decay is one process that unstable atoms can use to become more stable. There are two types of beta decay, beta-minus and beta-plus. During beta-minus decay, a neutron in an atom's nucleus turns into a proton, an electron and an antineutrino.The electron and antineutrino fly away from the nucleus, which now has one more proton than it started with. Since an atom gains a proton during beta-minus decay, it changes from one element to another.uring beta-plus decay, a proton in an atom's nucleus turns into a neutron, a positron and a neutrino. The positron and neutrino fly away from the nucleus, which now has one less proton than it started with. Since an atom loses a proton during beta-plus decay, it changes from one element to another.