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 Definition: Beta decay refers to the spontaneous radioactive decay where a beta particle is produced. There are two types of beta decay where the beta particle is either an electron or a positron. Î² - decay occurs when an electron is the beta particle.An atom will Î² - decay when a neutron in the nucleus converts to a proton by the reaction.Z X A â Z Y A+1 + e - + antineutrino.where X is the parent atom, Y is the daughter atom, Z is the atomic mass of X, A is the atomic number of X. - decay occurs when an electron is the beta particle. An atom will Î² - decay when a neutron in the nucleus converts to a proton by the reaction. Z X A â Z Y A+1 + e - + antineutrino. where X is the parent atom, Y is the daughter atom, Z is the atomic mass of X, A is the atomic number of X.