gray per second

SI coherent derived unit whose name and symbol includes an SI coherent derived unit with a special name and symbol

Name	Symbol	Quantity	Base units
gray per second	Gy/s	absorbed dose rate	m² s⁻³
The gray per second, symbol Gy/s, is the SI coherent derived unit of absorbed dose rate. One gray per second is equal to a rate of absorption of one joule per second, or one watt, of ionising radiation energy per kilogram of matter.
Definition			c² Δν_Cs
$1 \mspace{4mu} \text{Gy} / \text{s} \mspace{6mu} = \dfrac{1}{(299 \mspace{4mu} 792 \mspace{4mu} 458)^2(9 \mspace{4mu} 192 \mspace{4mu} 631 \mspace{4mu} 770)} \mspace{6mu} c^2 \mspace{4mu} \Delta \nu _{Cs}\\ \\ \\ 1 \mspace{4mu} \text{Gy} / \text{s} \mspace{6mu} \approx 1.210 \mspace{4mu} 371 \mspace{4mu} 614 \mspace{4mu} 889 \mspace{4mu} 147 \mspace{4mu} 716 \times10^{-27} \mspace{6mu} c^2 \mspace{4mu} \Delta \nu _{Cs}$

Absorbed dose

The gray is a measure of the amount of energy absorbed by a unit mass of matter when exposed to a source of ionising radiation.

$1 \ \text{Gy} \ = \ 1 \ \dfrac{\text{J}}{\text{kg}} = \ 1 \ \dfrac{\text{m}^2}{\text{s}^2}$

Absorbed dose rate

The gray per second is a measure of the rate of absorption of energy by a unit mass of matter when exposed to a source of ionising radiation.

$1 \ \text{Gy} \ \text{s}^{-1} \ = \ 1 \ \dfrac{\text{J}}{\text{kg} \ \text{s}} = \ 1 \ \dfrac{\text{W}}{\text{kg}}$

The gray per second is used for measuring the delivered dose rate of ionising radiation in applications such as radiotherapy, food irradiation and radiation sterilisation.

Radiation-related units

becquerel	Bq	activity referred to a radionuclide
coulomb per kilogram	C/kg	exposure (x- and γ-rays)
gray	Gy	absorbed dose
sievert	Sv	dose equivalent
gray per second	Gy/s	absorbed dose rate