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 ?
A common way to suppress die lip buildup is to blend into the base resin an incompatible processing aid in concentrations on the order of parts-per-million.
All that remained was to find a formula with a benefit buildup pattern that was balanced among all groups--that is, more than the traditional final average but less than cash balance at younger ages (in cash terms), while more than cash balance but less than an equal cost traditional final average pay plan at the later ages (in terms of the annuity that can be obtained).
During the transport of oil, the tankers accumulate a vast amount of oil waste buildup, which costs millions of dollars in cleanup fees and downtime.
These recommendations include putting the brakes on the uncoordinated security buildup of the last decade and undertaking a comprehensive evaluation of what is and is not working.
Applying mold release or silicone to the die exit area after cleaning can reduce the rate of buildup and extend the time between cleanings.
So far, scientists have come at Alzheimer's from three directions: drugs that block the buildup of protein deposits, ``plaque-busting'' drugs that break up the protein clusters and allow the brain to clear them away and vaccines that encourage the immune system to destroy the plaques.
Xtend 800 is said to provide easy release with a minimum of buildup and, in one example, molds only needed to be stripped after 80 to 100 parts.
any cash surrender buildup in the policies that exceeds the amount that is returnable to [the corporation that paid the insurance premiums] when the arrangement is discontinued.
Auto insurance buildup may seem harmless when it is thought of as just a few extra dollars tacked on to individual claims.
Thermally stable to 700 F, providing multiple releases with no mold buildup or transfer to the part.