IEVref: | 881-04-53 | ID: | |

Language: | en | Status: Standard | |

Term: | air kerma-rate constant | ||

Synonym1: | |||

Synonym2: | |||

Synonym3: | |||

Symbol: | Γ
_{δ} | ||

Definition: | for a radionuclide emitting photons, the quotient of $l}^{2}{\dot{K}}_{\delta$ by A, where K is the air kerma-rate due to photons of energy greater than δ, at a distance 1 from a point source of this nuclide having an activity _{δ}A$\Gamma}_{\delta}=\frac{{l}^{2}{\dot{K}}_{\delta}}{A$ NOTE – The SI unit of air kerma-rate constant is m When the special names gray (Gy) and becquerel (Bq) are used m When the earlier special units of activity (the curie) and kerma (the rad) are used
$1\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{rad}\cdot {\text{m}}^{2}\cdot {\text{Ci}}^{-1}\cdot {\text{s}}^{-1}=\frac{{10}^{-12}}{\mathrm{3,7}}\text{\hspace{0.17em}}{\text{m}}^{2}\cdot \text{J}\cdot {\text{kg}}^{-1}\left(\text{exactly}\right)$ | ||

Publication date: | 1983-01 | ||

Source | |||

Replaces: | |||

Internal notes: | |||

CO remarks: | |||

TC/SC remarks: | |||

VT remarks: | |||

Domain1: | |||

Domain2: | |||

Domain3: | |||

Domain4: | |||

Domain5: |

$\Gamma}_{\delta}=\frac{{l}^{2}{\dot{K}}_{\delta}}{A$
^{−1}.

When the special names gray (Gy) and becquerel (Bq) are used m^{2} • J • kg^{−1} becomes m^{2} • Gy • Bq^{−1} • s^{−1}.

When the earlier special units of activity (the curie) and kerma (the rad) are used

$1\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{rad}\cdot {\text{m}}^{2}\cdot {\text{Ci}}^{-1}\cdot {\text{s}}^{-1}=\frac{{10}^{-12}}{\mathrm{3,7}}\text{\hspace{0.17em}}{\text{m}}^{2}\cdot \text{J}\cdot {\text{kg}}^{-1}\left(\text{exactly}\right)$