# How much radiation is a curie?

## How much radiation is a curie?

The original unit for measuring the amount of radioactivity was the curie (Ci)–first defined to correspond to one gram of radium-226 and more recently defined as: 1 curie = 3.7×1010 radioactive decays per second [exactly].

How many disintegrations per second does a curie have?

37 billion
As such, 1 Ci is equal to 37 billion (3.7 x 1010) disintegrations per second, so 1 Ci also equals 37 billion (3.7 x 1010) Bequerels (Bq). A curie is also a quantity of any radionuclide that decays at a rate of 37 billion disintegrations per second (1 gram of radium, for example).

How do you work out curie minutes?

Curie or Ci – the most common unit of measure for the radioactivity of a substance. 1 Ci = 3.7×1010 disintegrations per second = 2.22×1012 disintegrations per minute (dpm). The term is most often used as a microCurie (µCi). 1 µCi = 3.7×104 disintegrations per second = 2.22×106 disintegrations per minute (dpm).

### How many REM are in a curie?

Conversion Equivalence

1 curie = 3.7 x 1010 disintegrations per second
1 rem = 0.01 sievert (Sv)
1 roentgen (R) = 0.000258 coulomb/ kilogram (C/kg)
1 megabecquerel (MBq) = 0.027 millicuries (mCi)
1 gray (Gy) = 100 rad

What is the value of 1 curie?

One curie (1 Ci) is equal to 3.7 × 1010 radioactive decays per second, which is roughly the amount of decays that occur in 1 gram of radium per second and is 3.7 × 1010 becquerels (Bq). In 1975 the becquerel replaced the curie as the official radiation unit in the International System of Units (SI).

How is Curie calculated?

Calculate the value in curies by dividing the decay rate per second by 3.7 x 10^10, the decay rate equal to 1 curie. For example, 1 gram of Cobalt-60 is equivalent to 1,119 curies because 4.141 x 10^13/ 3.7 x 10^10 = 1,119 Ci.

#### How many disintegrations per second is a Curie?

Curie (Ci) Radioactivity is also the term used to describe the rate at which radioactive material emits radiation, or how many atoms in the material decay (or disintegrate) in a given time period. As such, 1 Ci is equal to 37 billion (3.7 x 10 10) disintegrations per second, so 1 Ci also equals 37 billion (3.7 x 10 10) Bequerels (Bq).

What is the decay rate of a Curie?

Curie (Ci) A curie is also a quantity of any radionuclide that decays at a rate of 37 billion disintegrations per second (1 gram of radium, for example). The curie is named for Marie and Pierre Curie, who discovered radium in 1898.

How many bequerels are in a Curie of radium?

As such, 1 Ci is equal to 37 billion (3.7 x 10 10) disintegrations per second, so 1 Ci also equals 37 billion (3.7 x 10 10) Bequerels (Bq). A curie is also a quantity of any radionuclide that decays at a rate of 37 billion disintegrations per second (1 gram of radium, for example).

## How is the intensity of radiation measured in Curie units?

Curie (Ci) One of three units used to measure the intensity of radioactivity in a sample of material. This value refers to the amount of ionizing radiation released when an element (such as uranium) spontaneously emits energy as a result of the radioactive decay (or disintegration) of an unstable atom.