sievert

Also known as Sv

The sievert (symbol: Sv) is a derived unit in the International System of Units (SI) intended to represent the stochastic health risk of ionizing radiation, which is defined as the probability of causing radiation-induced cancer and genetic damage. The sievert is important in dosimetry and radiation protection. It is named after Rolf Maximilian Sievert, a Swedish medical physicist renowned for work on radiation dose measurement and research into the biological effects of radiation.

AI overview

A sievert is a unit of measurement that quantifies the health risk from exposure to ionizing radiation, specifically the likelihood that radiation will cause cancer or genetic damage. It's an important tool used by scientists and health professionals to assess radiation safety and protect people from harmful exposure.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Unit.name: sievert
Unit.image: File:展望の宿天神 2016 (26182596995).jpg
Unit.caption: Display of background radiation in a hotel at Naraha, Japan, showing dose rate in microsieverts per hour, five years after the Fukushima disaster
Unit.standard: SI
Unit.quantity: Stochastic health effect of ionizing radiation (equivalent dose)
Unit.symbol: Sv
Unit.namedafter: Rolf Maximilian Sievert
Unit.units1: SI base units
Unit.inunits1: m2⋅s−2
Unit.units2: Sv indicates absorbed dose modified by weighting factors.
Unit.inunits2: J⋅kg−1
Unit.units3: CGS units (non-SI)
Unit.inunits3: 100 rem

via Wikipedia infobox

Wikidata facts

Image: Radioactivity and radiation-ca.svg

Show 6 more facts

Commons category: Sievert (unit)
unit symbol: Sv
conversion to SI unit: 1
name in kana: シーヴェルト
short name: 希
Wikidata SPARQL query equivalent: wd:Q103246 p:P2370/psn:P2370 [wikibase:quantityAmount ?source; wikibase:quantityUnit ?base]. ?item p:P2370/psn:P2370 [wikibase:quantityAmount ?target; wikibase:quantityUnit ?base]. BIND(?source / ?target as ?value)

Sources (1)

wikidata.org

via Wikidata · CC0

~34 min read

Article

33 sections

Contents

Definition
CIPM definition of the sievert
ICRP definition of the sievert
External dose quantities
Naming conventions
Physical quantities
Operational quantities
Protection quantities
Instrument and dosimetry response
Calculating protection dose quantities
Radiation type weighting factor ''W''<sub>''R''</sub>
Tissue type weighting factor ''W''<sub>''T''</sub>
Operational quantities
Ambient dose equivalent
Directional dose equivalent
Personal dose equivalent
Proposals for changing the definition of protection dose quantities
Internal dose quantities
Health effects
Stochastic effects
Deterministic effects
ICRP dose limits
Dose examples
Dose examples
Dose rate examples
History
Common SI usage
Ionizing radiation quantities
Rem equivalence
See also
Explanatory notes
References
External links

The sievert unit is used for radiation dose quantities such as equivalent dose and effective dose, which represent the risk of external radiation from sources outside the body, and committed dose, which represents the risk of internal irradiation due to inhaled or ingested radioactive substances. According to the International Commission on Radiological Protection (ICRP), one sievert results in a 5.5% probability of eventually developing fatal cancer based on the disputed linear no-threshold model of ionizing radiation exposure.