ENTRY 23703 20200520 228823703 0 1 SUBENT 23703001 20200505 228823703 1 1 BIB 8 14 23703 1 2 TITLE Zirconium-97 in the spontaneous fission of uranium-23823703 1 3 AUTHOR (M.N.Rao) 23703 1 4 REFERENCE (J,JIN,29,863,1967) 23703 1 5 INSTITUTE (2GERKLN) 23703 1 6 SAMPLE Two kg of depleted ammonium diuranate (99.99% U-238, 23703 1 7 0.01 % U-235), 1.4 kg U-238 . 23703 1 8 DETECTOR (GEMUC) Phillips low background anticoincidence GM 23703 1 9 counter assembly . 23703 1 10 Counting efficiency 38.0+-1.0 % was assumed the same 23703 1 11 for Zr-97 and Nb-97. 23703 1 12 METHOD (CHSEP)7 days of Zr-97 activity growing, 23703 1 13 4 hr radiochemical procedure. 23703 1 14 Counting after complete decay of Zr-97. 23703 1 15 HISTORY (20200520C) M.M. 23703 1 16 ENDBIB 14 0 23703 1 17 NOCOMMON 0 0 23703 1 18 ENDSUBENT 17 0 23703 199999 SUBENT 23703002 20200520 228823703 2 1 BIB 5 17 23703 2 2 REACTION (92-U-238(0,F)40-ZR-97,CUM,FY) 23703 2 3 DECAY-DATA (40-ZR-97,17.HR,B-,1900.) 16.hr measured by decay curve23703 2 4 (41-NB-97,,B-,1300.) 23703 2 5 ANALYSIS Zr-97 yield was calculated as 23703 2 6 (NiLAMBLAi/(N238*LAMBLAf))*100, where 23703 2 7 NiLAMBLAi - equilibrium activity of the fission product23703 2 8 with mass number i, 23703 2 9 N238 - number 0f U-238 atoms, 23703 2 10 LAMBDAf - U-238 spontaneous fission decay constant, 23703 2 11 (7.8+-0.9)*10**17 1/yr. 23703 2 12 Equilibrium activity of Zr-97 : 23703 2 13 1st run - (3.67+-0.37)*10**-4 dis/sec per g U-238, 23703 2 14 2nd run - (3.96+-0.4)*10**-4 dis/sec per g U-238. 23703 2 15 ERR-ANALYS (DATA-ERR) Type of uncertainty is not explained in the 23703 2 16 article. 23703 2 17 STATUS (TABLE) Text page 864 of 23703 2 18 J. of Inorganic and Nuclear Chemistry,v.29,p.863,1967 23703 2 19 ENDBIB 17 0 23703 2 20 NOCOMMON 0 0 23703 2 21 DATA 2 1 23703 2 22 DATA DATA-ERR 23703 2 23 PC/FIS PC/FIS 23703 2 24 6.1 0.7 23703 2 25 ENDDATA 3 0 23703 2 26 ENDSUBENT 25 0 23703 299999 ENDENTRY 2 0 2370399999999