buildup

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buildup

An increase in absorbed dose of radiation with depth below the surface in a radiated material by a beam of X-rays or gamma rays.
 
Types
Electron buildup—Due to an increasing electron flux in the material, which is more important for high energy beams.

Photon buildup—Due to scattering in broad beams of radiation.
References in periodicals archive ?
This study found that relatively young men with HIV infection and with no history or symptoms of heart disease have plaque (fatty build-ups) in coronary arteries significantly more often than a similar group of men without HIV.
As we held overhead, I noticed towering cumulus build-ups within several miles of the ship.
New finance minister It has also conducted monthly auctions of 91-, 182- and 273-day T-bills since 2011, consistently draining 4 billion riyals despite occasional build-ups of excess liquidity as well as a recent fall in demand for the bills linked to geopolitical tensions over the unrest in Syria.
A study published in the March 2013 issue of the Journal of the American Medical Association found that among individuals with the AP0e4 gene variation, which confers higher risk for AD, those who had uncontrolled hypertension were significantly more likely to have major build-ups of toxic brain plaques associated with All than those who took medication or did not have hypertension.
Framed models include an ultra-smooth, mirror-finish SS frame with sloping edges to minimize particle build-ups.
Alexander Likhotal, said the persistent nuclear threat with over 20,000 nuclear weapons worldwide, is exacerbated by increased conventional military build-ups. 'Today, the goal of a nuclear-weapons-free world has even greater urgency.
"The Reserve Bank has also been looking into the effectiveness of some macroprudential instruments that may limit build-ups of problems in future periods of rapid credit growth," he said.
It noted that huge military build-ups, as well as various military tanks and machineries are heading toward the town of Izaz in Aleppo amid fears of committing newer massacres.
Patient build-ups and good passing out wide twice ended with wing Rhys Thomas going over to put the Quins 17-6 up at half time.
These harmful plaque build-ups can lead to gum disease and even tooth loss.
The Uefa technical report on the 2010-11 Champions League gives the number of goals scored from different build-ups. What would be even more illuminating would be to be told the total number of moves involving those build-ups.
THE travel getaway began yesterday as school summer holidays started, with drivers warned to expect traffic build-ups on major routes as around 14 million cars were expected on the roads.