| actinic |
of or pertaining to the chemical property of ultraviolet radiation and x-rays that produces photochemical effects. |
| actinic rays |
electromagnetic radiation, such as x-rays or ultraviolet light, that can produce an image on a photographic emulsion. |
| actinism |
the property of radiation that produces chemical activity. |
| alpha particle |
a positively charged particle given off as radiation from some fission or decay processes, consisting of two protons and two neutrons. |
| alpha ray |
radiation composed of alpha particles. |
| angle of incidence |
the angle that the line of movement of a body or of radiation, meeting a surface, makes with a line that is at right angles to the surface at the point of meeting. |
| anthracene |
a crystalline hydrocarbon derived from coal tar and used in making dyes and detecting radiation. |
| atomic clock |
an extremely accurate timekeeping device regulated by the reliably constant frequency at which atoms of certain highly reactive substances absorb or emit electromagnetic radiation. |
| black light |
ultraviolet or infrared radiation that is invisible but indirectly detectable, as by fluorescence. |
| bombard |
to shoot radiation or high energy particles at. [1/4 definitions] |
| bremsstrahlung |
electromagnetic radiation, such as x-rays, produced by the sudden deceleration or acceleration of an electron caused by its approach to an atomic nucleus. |
| collimator |
a device that transmits a beam of radiation, esp. light, as parallel rays. [1/2 definitions] |
| cosmic ray |
high energy radiation, consisting primarily of high-energy protons and alpha particles, that primarily originates from outside the solar system. Upon collision with earth's atmosphere, secondary particles can be produced that sometimes reach the earth's surface. |
| decontaminate |
to make (an area) safe for humans by removing or neutralizing radiation, poisonous substances, or the like. [1/2 definitions] |
| delta ray |
any particle emitted from matter following bombardment by ionizing radiation. |
| detector |
a device that records or identifies something, esp. changes in radiation, temperature, pressure, or the like. [1/2 definitions] |
| diffusion |
a spreading of light rays or other radiation by reflection from or by passing through an irregular surface. [1/3 definitions] |
| dose |
the amount of radiation or other toxic entity administered to or absorbed by a living organism. [1/5 definitions] |
| dosimeter |
a portable instrument that measures amounts of radiation, such as gamma rays or x-rays, to which a person has been exposed. |
| expose |
to subject (living beings) to the action of some substance or agent, such as radiation. [1/7 definitions] |
| fluor |
any compound that fluoresces when exposed to radiation, often added to experimental samples as a radiation indicator. [1/2 definitions] |