(radioactive decay)
51radioactive dating — ☆ radioactive dating n. the determination of the age of an artifact, bone, rock, etc. based on the known rates of decay of radioactive isotopes of various elements …
52decay — ► VERB 1) rot through the action of bacteria and fungi. 2) decline in quality or vigour. 3) Physics (of a radioactive substance, particle, etc.) undergo change to a different form by emitting radiation. ► NOUN 1) the state or process of decaying …
53radioactive constant — decay c …
54Decay scheme — The Decay scheme of a radioactive substance is a graphical presentation of all the transitions occurring in a decay, and of their relationships. Decay schemes of radioactive isotopes Decay scheme of 60Co These relations can be quite complicated;… …
55Radioactive contamination — The radiation warning symbol (trefoil) …
56decay — I. verb Etymology: Middle English, from Anglo French decaïr, from Late Latin decadere to fall, sink, from Latin de + cadere to fall more at chance Date: 15th century intransitive verb 1. to decline from a sound or prosperous condition 2. to… …
57decay — /dəˈkeɪ/ (say duh kay) verb (i) 1. to fall away from a state of excellence, prosperity, health, etc.; deteriorate; decline. 2. to become decomposed; rot. 3. Physics a. (of a radioactive substance) to transform into a daughter product. b. (of an… …
58decay constant — noun : the constant ratio of the number of radioactive atoms disintegrating in any specified short unit interval of time to the total number of atoms of the same kind still intact at the beginning of that interval * * * Physics. the reciprocal of …
59radioactive isotope — ▪ chemistry also called radioisotope any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha, beta, and gamma rays …
60decay — de•cay [[t]dɪˈkeɪ[/t]] v. i. 1) mcr to become decomposed; rot 2) to decline in health, prosperity, etc.; deteriorate 3) phs (of an atomic nucleus) to undergo radioactive disintegration 4) mcr to cause to decompose; rot 5) mcr decomposition; rot… …
