the world > matter > physics > atomic nucleus > nuclear fission > [noun] > neutron ratio
reproduction factor1918
multiplication factor1941
multiplication constant1945
reproduction constant1950
1950 Proc. Physical Soc. A. 63 1175 This periodic motion of the sample produced a periodic change in the reproduction constant of the pile.
1999 M. BrowneSchaum's Outl. Theory & Probl. Physics for Engin. & Sci. xxxvii. 446 A measure of whether a self-sustained chain reaction can occur is the reproduction constant.