Definitions for

**"Curie"****Related Terms:**Becquerel, Picocurie, Activity, Pci/l, Millicurie, Specific activity, Decay constant, Radioactive tracer, Radium, Parent isotope, Decay product, Decay chain, Radioisotope, Half-life, Dose rate, Parent, Radioactive material, Radioisotopes, Cask, Thorium, Radiotoxicity, Radioactive contamination, Radionuclides, Dirty bomb, Decay, Radionuclide, Half life, Radioactive dating, Dpm, Disequilibrium, Radiotracer, Polonium, Radioactive decay, Radiometric dating, Cobalt 60, Daughter product, Roentgen, Radon, Radiopharmaceutical, Gray, Second, Gal, Feet per second, Microsecond, Hertz, Ppm , Ppb, Background, Gigahertz

A curie is a measure of radioactive material. It measures the number of atoms that decay each second. One curie is 37 billion atoms undergoing decay each second. Hanford released approximately 725,000 curies of iodine-131 between 1944 to 1957. In contrast, the 1979 accident at the Three Mile Island nuclear power plant in Pennsylvania was estimated to have released between 15 to 24 curies of radioactive iodine-131. A "nanocurie" is one billionth of a curie. A "picocurie" is one trillionth of a curie.

Unit of radioactivity equal to the radioactivity of 1 gram of radium -226. It is equal to 37 billion disintegrations per second. decay correction: The amount by which the calculated radioactivity (for example, of a release of radioisotopes) must be reduced after a period of time, to allow for its radioactive decay during that time.

A unit of radioactivity that represents the amount of radioactivity associated with one gram of radium. To say that a sample of radioactive material exhibits one curie of radioactivity means that the element is emitting radiation at the rate of 3.7 million times a second. Named after Marie Curie, an early nuclear scientist.

This is a measure of radioactive material. It measures the number of atoms that decay each second. One curie is 37 billion atoms undergoing decay each second. Hanford released an estimated 739,000 curies of iodine-131 from 1944 to 1972. In contrast, the 1979 accident at the Three Mile Island nuclear power plant in Pennsylvania released an estimated 15 curies of iodine-131. [Back to Module 2

The basic unit of measure for describing the activity (radioactivity) of a quantity of radioactive material. The amount of radioactive material giving off 37 billion disintegrations per second. In the United States, the picocurie (1 pCi = 0.037 d.p.s.) is the unit used for many measurements of radioactive contamination. (Basic Science/Radiography/halflife1.htm)(Course Material/Radiography/Physics/nature.htm)

A measure of the rate at which a radioactive material decays. The radioactivity of one gram of radium is a curie. It is named for Pierre and Marie Curie, pioneers in radioactivity and discoverers of the elements radium, radon, and polonium. One curie corresponds to 37 billion disintegrations per second.

The traditional unit of measure for the quantity of radioactive material; one curie is that quantity of radioactive material in which 37 billion transformations occur per second, which is approximately the activity of 1 gram of radium. One curie is equivalent to 37 gigabecquerels.

A unit of radiation that describes the number of atoms undergoing nuclear transformations per unit time, i.e., 3.7 x 1010 disintegrations per second.

3/4 The unit of radioactivity. One curie (1 Ci) is 3.7 × 1010 nuclear transformations per second. 1 Ci = 3.7 × 1010 Bq = 37 GBq.

abbreviated Ci; the activity of 1 gram of radium-226

one curie is the number of transformations or disintegrations of one gram of radium. One curie equals 3.7 X 10 to the 10th disintegrations per second.

A unit for measuring the activity of a radioactive nuclide. By definition, 1 Ci = 3.700 x 1010 disintegrations per second.

A measure of the amount of radioactivity in a material. One Curie is 37 billion atoms undergoing radioactive decay each second.

The Curie (Ci) is an old unit of activity. One curie is a very large amount of radioactivity. It is more common to find activities given in millicurie or microcurie 1 Ci = 37 GBq = 37,000,000,000 Bq

See Units of radioactivity.

French chemist (born in Poland) who won two Nobel Prizes; one (with her husband and Henri Becquerel) for research on radioactivity and another for her discovery of radium and polonium (1867-1934)

French physicist; husband of Marie Curie (1859-1906)

a unit of radioactivity equal to the amount of a radioactive isotope that decays at the rate of 37,000,000,000 disintegrations per second

a commonly used measurement of danger of radon radioactivity

a common unit for measuring the radioactivity from different elements

a measurement commonly used of the radioactivity

a measurement of radioactive material

a measure of how many atoms per second are decaying and emitting particles and rays

a measure of nuclear decay in a given amount of material Umm yeah

a measure of nuclear decay (number of atomic transfiguations per second) in a given amount of material

a physical unit of radioactivity, not a unit of radiation exposure

a radiation related term, but the fact is, it is NOT a unit of radiation, it is a unit of activity, in terms of nuclear transfigurations

a unit of measure for nuclear material

a unit that indicates the rate at which radiation is given off by the radioactive material in the waste

the traditional measure of radioactivity based on the observed decay rate of 1 gram of radium. One curie of radioactive material will have 37 billion disintegrations in 1 second. For more information, see " Primer on Radiation Measurement" at the end of this document.

The former unit for expressing activity. The curie was originally based on the decay of 1 gram of radium and is equivalent to 37 billion disintegrations per second. More common units are the millicurie (mCi) and the microcurie ( Ci). This unit is being replaced by the SI unit known as the becquerel (Bq). One mCi is equivalent to 37 MBq.

The unit of activity equal to 3.7 x 1010 disintigrations per second.

a measure of radioactivity. One curie equals 3.7 x 10^10 nuclear transformations per second. Ci is the symbol used. (a) Microcurie: one-millionth of a curie. (3.7 x 10^4 disintegrations per second) mCi is the symbol used. (b) Picocurie: one-millionth of a microcurie. (3.7 x 10^-2 disintegrations per second) pCi is the symbol used.

A unit of radioactivity. One curie is the amount of material in which 3.7 X 1010 atoms transform per second. The becquerel (Bq) is the primary unit currently used internationally. One Bq is equal to 1.0 disintegration per second (or 2.7 X 10-11 Ci). The radioactivity of 1 gram of radium is approximately 1 Ci. Several fractions of the curie are in common usage: Millicurie (mCi): One-thousandth of a curie (3.7 X107 disintegrations per second). Microcurie ( Ci): One-millionth of a curie (3.7 X 104 disintegrations per second). Picocurie (pCi): One-millionth of a microcurie (3.7 X 10-2 disintegrations per second or 2.2 disintegrations per minute).

The unit used to describe the intensity of radioactivity in a sample of material. The curie is equal to 37 billion (3.7 x 1010) disintegrations per second, which is approximately the activity of 1 gram of radium. The Becquerel (Bq) has replaced the Ci in the SI system. The Becquerel (Bq) is 1 disintegration per second.

A unit quantity of any radioactive nuclide in which there are 37 billion atomic transformations (disintegrations) in one second. A measure of radioactivity based on the observed decay rate of approximately one gram of radium. The Curie was named in honor of Pierre and Marie Curie, pioneers in the study of radiation. [For additional information see Understanding Radiation: Curies.] Units Factor Prefix Symbols Factor Prefix Symbols 1018 exa 10-1 deci 1015 peta 10-2 centi 1012 tera 10-3 milli 109 giga 10-6 microµ 106 mega 10-9 nano 103 kilo 10-12 pico 102 hecto 10-15 femto 101 deka da 10-18 atto

The basic unit of activity. A quantity of any radionuclide that undergoes an average transformation rate of 37 billion transformations per second. One curie is the approximate activity of 1 gram of radium. Named for Marie and Pierre Curie, who discovered radium in 1898.

a unit of activity equal to 3.7 E10 disintegrations per second.

A quantity of nuclear material undergoing 37 billion disintegrations per second(equivalent to one gram of radium and named after Marie Curie). Stored irradiated fuel contains approximately 25,000,000,000 (25 billion) curies.

The unit of radioactivity that quantifies the number of radioactive atoms that decays per unit time. The unit used in countries other than the United States is the becquerel (Bq). One Bq equals 2.7 x 10-11 Ci.

a measure of radioactivity based on the observed decay rate of approximately one gram of radium. The Curie was named in honor of Pierre and Marie Curie, pioneers in the study of radiation. One curie of radioactive material will have 37 billion atomic transformations (disintegrations) in one second. Curie Figures in History: Pierre and Marie Curie [] [ Click "BackButton" for previous location] | | | | | | | | | | | | | | | | | | | | | | | xyz

measure unit of radioactivity, corresponds to 37 giga disintegrations per second

A unit of radioactivity equal to the radioactivity of one gram of radium-226.

The basic unit used to describe the intensity of radioactivity in a sample of material. The curie is equal to 37 billion disintegrations per second, which is approximately the rate of decay of 1 gram of the isotope radium-226. A curie is also a quantity of any radionuclide that decays at a rate of 37 billion disintegrations per second.

a unit of radioactivity equal to 2.22 x 1012 disintegrations per minute.

A unit of radioactivity; abbreviated, Ci. A curie is equal to 3.7 x 1010 becquerels. A picocurie (pCi) is equal to 1 x 10-12 curie.

A unit of radioactivity equal to that emitted by 1 gram of pure radium.

Old unit of radioactivity, corresponding to 3.7 x 10 10 radioactive disintegrations per second. Now replaced by the becquerel.

A unit of the intensity of radioactivity in a material. A curie is equal to 37 billion disintegrations each second.

The basic unit used to describe the intensity of radioactivity in a sample of material. One curie equals thirty-seven billion disintegrations per second, or approximately the radioactivity of one gram of radium.

A unit of measure used to describe the amount of radioactivity in a sample of material.

The special unit of activity. One curie is the amount of material in which 3.700 X 1010 atoms transform per second. (Abbreviated Ci.) Becquerel (Bq) is replacing it. One Bq is equal to 2.7 X 10-11 Ci (or 1.0 disintegrations per second). Several fractions of the curie are in common usage

( Ci): the basic unit which is used to describe how radioactive a substance is.

A standard measurement for radioactivity, specifically the rate of decay for a gram of radium – 37 billion decays per second. A unit of radioactivity equal to 3.7 x 1010 disintegrations per second.

The quantity of any radionuclide that produces 3.70 x 1010 disintegrations per second.

A measure of radioactivity. One curie of radioactive material will have 37 billion transformations of atoms (disintegrations) in one second. One curie of radium weighs approximately one gram.

The unit of radioactivity equal to a rate of 3.7 E+10 nuclear disintegrations per second (2.22 E+12 dpm or 3.7E+10 Bq). Originally based on the radioactive decay rate of 1 gram of radium, discovered by Marie and Pierre Curie in 1898.

A measure of the amount of radiation emitted per second by radioactive chemicals, named after Marie Curie, the discoverer of radium. It is the number of disintegrations taking place each second in 1 gram of radium, leading to the emission of some 37 billion gamma rays or other particles every second. millicurie -- one one-thousandth of a curie. microcurie -- one millionth of a curie. picocurie -- one trillionth of a curie or one micro-microcurie.

The amount of radioactive material that will give 37 billion disintegrations per second.

a huge amount of tritium

a HUGE yardstick