| 释义 |
secular equilibrium
secular equilibrium[′sek·yə·lər ‚ē·kwə′lib·rē·əm] (nucleonics) 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. secular equilibrium
sec·u·lar e·qui·lib·ri·uma type of radioactive equilibrium in which the half-life of the precursor (parent) radioisotope is so much longer than that of the product (daughter) that the radioactivity of the daughter becomes equal to that of the parent with time. |