Half-value layer
A material's half-value layer (HVL), or half-value thickness, is the thickness of the material at which the intensity of radiation entering it is reduced by one half. HVL can also be expressed in terms of air kerma rate (AKR), rather than intensity: the half-value layer is the thickness of specified material that, "attenuates the beam of radiation to an extent such that the AKR is reduced to one-half of its original value. In this definition the contribution of all scattered radiation, other than any [...] present initially in the beam concerned, is deemed to be excluded." Rather than AKR, measurements of air kerma, exposure, or exposure rate can be used to determine half value layer, as long as it is given in the description.
Wikipage disambiguates
primaryTopic
Half-value layer
A material's half-value layer (HVL), or half-value thickness, is the thickness of the material at which the intensity of radiation entering it is reduced by one half. HVL can also be expressed in terms of air kerma rate (AKR), rather than intensity: the half-value layer is the thickness of specified material that, "attenuates the beam of radiation to an extent such that the AKR is reduced to one-half of its original value. In this definition the contribution of all scattered radiation, other than any [...] present initially in the beam concerned, is deemed to be excluded." Rather than AKR, measurements of air kerma, exposure, or exposure rate can be used to determine half value layer, as long as it is given in the description.
has abstract
A material's half-value layer ...... eved for a monoenergetic beam.
@en
Als Halbwertsschicht oder Halb ...... ntel des ursprünglichen Werts.
@de
La couche de demi-atténuation ...... rayonnements monochromatiques.
@fr
Per strato emivalente o spesso ...... ativa) di una data radiazione.
@it
Wikipage page ID
Wikipage revision ID
713,519,008
comment
A material's half-value layer ...... t is given in the description.
@en
Als Halbwertsschicht oder Halb ...... ntel des ursprünglichen Werts.
@de
La couche de demi-atténuation ...... nditions de bonne géométrie. »
@fr
Per strato emivalente o spesso ...... ativa) di una data radiazione.
@it
label
Couche de demi-atténuation
@fr
Halbwertsschicht
@de
Half-value layer
@en
Strato emivalente
@it