radioactivity+decay

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• Decay correct — is a method of adjusting the measurements of radioactive decay obtained at two different time points so that they may be used as a single data set. If a chemical compound is tagged with a radioactive isotope then the amount of radiation released… …   Wikipedia

• radioactivity — a di*o*ac*tiv i*ty (r[=a] d[i^]*[ o]*[a^]k*t[i^]v [i^]*t[y^]), n. (Physics) a form of instability which is a property of the atomic nuclei of certain isotopes, which causes a spontaneous change in the structure of the nucleus, accompanied by… …   The Collaborative International Dictionary of English

• Radioactivity in biological research — Radioactivity can be used in life sciences as a radiolabel to easily visualise components or target molecules in a biological system. Radionuclei are synthesised in particle accelerators and have short half lives, giving them high maximum… …   Wikipedia

• radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …   Universalium

• Decay chain — In nuclear science, the decay chain refers to the radioactive decay of different discrete radioactive decay products as a chained series of transformations. Most radioactive elements do not decay directly to a stable state, but rather undergo a… …   Wikipedia

• Decay 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;… …   Wikipedia

• Decay energy — Nuclear physics Radioactive decay Nuclear fission Nuclear fusion Classical decays …   Wikipedia

• decay — {{11}}decay (n.) mid 15c., deterioration, decline in value, from DECAY (Cf. decay) (v.). Meaning gradual decrease in radioactivity is from 1897. {{12}}decay (v.) late 15c., to decrease, from Anglo Fr. decair, O.N.Fr. decair (O.Fr. decheoir, 12c …   Etymology dictionary

• decay time —    1. a unit of relative time used in physics. Decay time is similar to half life, but shorter and less familiar. It is the time required for an exponentially decaying process (such as radioactivity) to decrease to 1/e = 36.7879% of its original… …   Dictionary of units of measurement

• decay — 1. Destruction of an organic substance by slow combustion or gradual oxidation. 2. SYN: putrefaction. 3. To deteriorate; to undergo slow combustion or putrefaction. 4. In dentistry, caries. 5. In psychology, loss of informat …   Medical dictionary

• decay — v. & n. v. 1 a intr. rot, decompose. b tr. cause to rot or decompose. 2 intr. & tr. decline or cause to decline in quality, power, wealth, energy, beauty, etc. 3 intr. Physics a (usu. foll. by to) (of a substance etc.) undergo change by… …   Useful english dictionary