THE FISSION PRODUCT DECAY CHAINS (PU239 with Fission Spectrum Neutrons) Volume I Discussion Decay Chain Diagrams (Atom Fraction of the total Chain yield vs. time)

摘要

Three parameters for each radionuclide in each fission product mass chain have been computed and plotted vs. time from 0.6 seconds to about two years. The parameters are:(1) the (atom) fraction of the total chain yield, i.e. , the ratio of the number of atoms of a given nuclide in a mass chain to the sum of the atoms of all nuclides in the mass chain;(2) the number of kilocuries per kiloton of fission;(3) the number of roentgens per hour per kiloton per square mile. Each decay chain diagram is presented together with the following values for each nuclide in the chain — the half-life, the inde¬pendent yield, the photon dose-rate multiplier, the zero time atom fraction, the kilocuries per kiloton per fraction and the roentgens per hour per kiloton per square mile per fraction. Total fission product sums of KCiAt and of R•Mi2 /h•kt, each vs. time from 0.6 second to about two years, have been computed and plotted.