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| Background Radiation |
Radiation arising from radioactive material other than the one directly under consideration. Also see natural background radiation. |
| Becquerel (Bq) |
International System of Units unit of radioactivity equal to the amount of radioactive material that yields one nuclear transformation (disintegration) per second. (1 Bq = 1 disintegration per second = 2.7 X 10-11 Curie). |
| Beta Particle (b) |
A negatively charged particle whose mass and charge are the same as that of an electron. Beta particles are emitted from the nucleus of certain radioactive atoms. |
| Beta-2-microglobulin |
An indicator of potential kidney damage. |
| Bioassay |
Determination of the quantity, type and location of radioactive material in the human body by direct measurement or by analysis of materials excreted or removed from the body. |
