HVT
Half Value Thickness
HVT – Half Value Thickness is the thickness of specified material which, when introduced into the beam of X or gamma radiation, reduces the intensity of the incident beam by a half. If the incident intensity is I0 then the transmitted intensity from the HVT of a material is I0. If the thickness of the material is twice the HVT, then the transmitted intensity is I0/4.
The HVT helps to simplify the calculation of the required thickness of shielding layers.
For more information on HVT and other radiographic terms see:
BS EN 1330-3: 1997 – Non-destructive testing. Terminology. Terms used in industrial radiographic testing
http://www.ndt-ed.org/EducationResources/CommunityCollege/Radiography/Physics/HalfValueLayer.htm
What the hec?! articles are not intended to be the definitive account on the topic or acronym in question. Readers’ comments and contributions are welcomed. Email: ndtnews@bindt.org
The HVT helps to simplify the calculation of the required thickness of shielding layers.
For more information on HVT and other radiographic terms see:
BS EN 1330-3: 1997 – Non-destructive testing. Terminology. Terms used in industrial radiographic testing
http://www.ndt-ed.org/EducationResources/CommunityCollege/Radiography/Physics/HalfValueLayer.htm
What the hec?! articles are not intended to be the definitive account on the topic or acronym in question. Readers’ comments and contributions are welcomed. Email: ndtnews@bindt.org