This page documents an OPTIMADE Unit Definition. See https://schemas.optimade.org/ for more information.
ID: https://schemas.optimade.org/defs/v1.2/units/si/1975/named/gray
Definition name: gray
Unit name: gray
Latin symbol: Gy
Display symbol: Gy
Description: A derived SI unit for absorbed dose of ionizing radiation equal to m²·s⁻² using the 1967 base SI units at the 15th CGPM Meeting in 1975.
"The 15th Conférence Générale des Poids et Mesures, [...] adopts the following special name for the SI unit of ionizing radiation: gray, symbol Gy, equal to one joule per kilogram." [15th CGPM Meeting (1975)]
Resources:
JSON definition:
{
"$id": "https://schemas.optimade.org/defs/v1.2/units/si/1975/named/gray",
"$schema": "https://schemas.optimade.org/meta/v1.2/optimade/physical_unit_definition.json",
"title": "gray",
"symbol": "Gy",
"display-symbol": "Gy",
"description": "A derived SI unit for absorbed dose of ionizing radiation equal to m\u00b2\u00b7s\u207b\u00b2 using the 1967 base SI units at the 15th CGPM Meeting in 1975.\n\n\"The 15th Conf\u00e9rence G\u00e9n\u00e9rale des Poids et Mesures, [...] adopts the following special name for the SI unit of ionizing radiation: gray, symbol Gy, equal to one joule per kilogram.\" [15th CGPM Meeting (1975)]",
"resources": [
{
"relation": "Definition at the 15th CGPM Meeting (1975)",
"resource-id": "https://www.bipm.org/en/committees/cg/cgpm/15-1975"
},
{
"relation": "Wikipedia article describing the unit",
"resource-id": "https://en.wikipedia.org/wiki/Gray_(unit)"
}
],
"defining-relation": {
"base-units": [
{
"symbol": "m",
"id": "https://schemas.optimade.org/defs/v1.2/units/si/1960/base/metre"
},
{
"symbol": "s",
"id": "https://schemas.optimade.org/defs/v1.2/units/si/1967/base/second"
}
],
"base-units-expression": "m^2*s^-2"
},
"standard": {
"name": "si",
"year": 1975,
"category": "named",
"symbol": "Gy"
},
"x-optimade-definition": {
"label": "gray_si_1975_named",
"kind": "unit",
"format": "1.2",
"version": "1.2.0",
"name": "gray"
}
}