Secular equilibrium | Article about secular equilibrium by The Free Dictionary
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secular equilibrium[′sek·yə·lər ‚ē·kwə′lib·rē·əm]
Radioactive equilibrium in which the parent has such a small decay constant that there has been no appreciable change in the quantity of parent present by the time the decay products have reached radioactive equilibrium.
References in periodicals archive
1), the expression 'long-period equilibrium' refers to a secular equilibrium
ANSTO established that the uranium was in secular equilibrium
and therefore not adversely affecting gamma readings, and that thorium concentrations were probably not a major contributing factor to gamma readings.
8 day half-life) in secular equilibrium
is the only standard worldwide that provides a National Institute of Standards and Technology (NIST) traceable calibration for F-18 and is the culmination of two years of collaborative research by NIST.