7gers ~ninr78-782-L I/F § CALCULATION OF FISSION PRODUCT - GAMMA RAY AND BETA SPECTRA AT SELECTED TIMES AFTER FAST FISSION OF U238 AND U235 AND THERMAL FISSION OF Ué35 DRAFT FINAL ~ PREPARED BY . S. FP. FINN G. L. SIMMONS _. V. SPENCER PREPARED FOR NATIONAL BUREAU OF STANDARDS PURCHASE ORDER 808946 FEBRUARY 9000856 23, 1979 — i : |