ENTRY 23547 20200402 22872354700000001 SUBENT 23547001 20200402 22872354700100001 BIB 12 28 2354700100002 TITLE Fission yields of some isotopes in the fission of 2354700100003 Th232 by reactor neutrons 2354700100004 AUTHOR (A.Wyttenbach,H.R.von Gunten) 2354700100005 REFERENCE (C,65SALZBURG,1,415,1965) 2354700100006 (J,RCA,3,118,1964) First publication. 2354700100007 INSTITUTE (2SWTWUR) 2354700100008 FACILITY (REAC,2SWTWUR) "Saphir" swimming pool reactor. 2354700100009 Power was constant within +-5%. 2354700100010 INC-SOURCE (REAC) 2354700100011 INC-SPECT Flux of neutrons above 1.MeV energy 2354700100012 (1.0 - 1.4)*10**12 n/(cm2*sec) at the position of 2354700100013 the sample and irradiation 6 - 20 hr. 2354700100014 SAMPLE Th foils, 100-200 mg weight each, 100 mg/cm2 2354700100015 thickness. Natural U contamination < 10 ppm. 2354700100016 Four samples stacked together, wrapped in 350 mg/cm2 2354700100017 Cd foil, irradiated at the central position at the 2354700100018 side of the reactor core. 2354700100019 DETECTOR (NAICR) Gamma-spectrometer (3in x 3in NaI(Tl)crystal), 2354700100020 calibrated at 11 energies by standards, for 2354700100021 gamma-spectrometry of Ru-103, Ag-111, Pd-112, I-131, 2354700100022 Cs-137, Ba-140, Ce-141. 2354700100023 Calibration accuracy +-2.%. 2354700100024 (PROPC) beta-proportional gas-flow counter for Sr-90, 2354700100025 Ru-106, Ce-144. Calibrated by standards. 2354700100026 METHOD (CHSEP) Chemical yields were determined by 2354700100027 gravimetric methods. 2354700100028 CORRECTION For coincidence loss. 2354700100029 HISTORY (20200406C) M.M. 2354700100030 ENDBIB 28 0 2354700100031 NOCOMMON 0 0 2354700100032 ENDSUBENT 31 0 2354700199999 SUBENT 23547002 20200402 22872354700200001 BIB 6 25 2354700200002 REACTION 1((90-TH-232(N,F)ELEM/MASS,CUM,FY,,FIS)/ 2354700200003 (90-TH-232(N,F)42-MO-99,CUM,FY,,FIS)) 2354700200004 2(90-TH-232(N,F)ELEM/MASS,CUM,FY,,FIS) 2354700200005 MONITOR 2(90-TH-232(N,F)42-MO-99,CUM,FY,,FIS) 2354700200006 MONIT-REF (30947001,R.H.Iyer+,J,JIN,25,465,1963) 2354700200007 REL-REF (A,30947003,R.H.Iyer+,J,JIN,25,465,1963) 2354700200008 Mainly agree . 2354700200009 (A,,J.M.Crook+,R,TID-4500,1963) 2354700200010 Sr-90 - 2.70+-0.15 %/fis, Ba-140 - 2.48+-0.14 %/fis, 2354700200011 Ce-141 - 2.36+-0.15 %/fis, Ce-144 - 2.56+-0.15 %/fis. 2354700200012 (A,13367001,A.Turkevich+,J,PR,84,52,1951) 2354700200013 Mainly agree . 2354700200014 (D,13095001,K.R.Broom,J,PR,133,B874,1964) and TID 187762354700200015 ERR-ANALYS1(DATA-ERR) One standard deviation, including 2354700200016 weighting of the foils, 2354700200017 aliquoting, 2354700200018 determination of the chemical yields, 2354700200019 counting, 2354700200020 internal monitoring of neutron flux. 2354700200021 (ERR-1,,5.) Includes counters calibration, decay 2354700200022 schemes and half-lives. Monitor error is not included. 2354700200023 2(DATA-ERR) Not explained, given only in RCA,3,118,1964.2354700200024 STATUS (TABLE) Tables 1,2 of Conf.Proc.65SALZBURG,1,415,1965. 2354700200025 In Tables 1,2 of Radiochimica Acta,v.3,p.118,1964 2354700200026 only 6 isotopes. 2354700200027 ENDBIB 25 0 2354700200028 COMMON 2 3 2354700200029 EN-MIN MONIT 2354700200030 MEV PC/FIS 2354700200031 1. 2.78 2354700200032 ENDCOMMON 3 0 2354700200033 DATA 6 10 2354700200034 MASS ELEMENT DATA 1DATA-ERR 1DATA 2DATA-ERR 22354700200035 NO-DIM NO-DIM NO-DIM NO-DIM PC/FIS PC/FIS 2354700200036 90. 38. 2.52 0.03 6.99 0.07 2354700200037 103. 44. 0.053 0.003 0.15 2354700200038 106. 44. 0.022 0.001 0.062 2354700200039 111. 47. 0.029 0.001 0.082 2354700200040 112. 46. 0.032 0.001 0.090 2354700200041 131. 53. 0.77 0.02 2.13 0.04 2354700200042 137. 55. 2.37 0.07 6.59 0.18 2354700200043 140. 56. 2.78 0.04 7.72 0.11 2354700200044 141. 58. 2.61 0.04 7.26 0.11 2354700200045 144. 58. 2.87 0.11 7.98 0.30 2354700200046 ENDDATA 12 0 2354700200047 ENDSUBENT 46 0 2354700299999 ENDENTRY 2 0 2354799999999