ENTRY 30511 20211108 32033051100000001 SUBENT 30511001 20211108 32033051100100001 BIB 13 42 3051100100002 INSTITUTE (3INDTRM) 3051100100003 REFERENCE (J,PR/C,19,1827,1979) Final results 3051100100004 (P,BARC-872,101,1976) Same r-values,other normalization3051100100005 (P,BARC-821,183,1975) Fewer fission products 3051100100006 (P,BARC-690,132,1973) Superseded 3051100100007 (C,75CALCUTTA,2,138,1975) Data on graphs. 3051100100008 AUTHOR (S.B.Manohar, P.P.Venkatesan, S.M.Deshmukh, 3051100100009 Satya Prakash, M.V.Ramaniah) 3051100100010 TITLE Mass distribution in the neutron induced fission of 3051100100011 232U 3051100100012 FACILITY (REAC,3INDTRM) CIRUS reactor 3051100100013 INC-SPECT Cd-cutoff ratio for 232U(n,f) = 0.5 approximately 3051100100014 SAMPLE (92-U-232,ENR=0.9914) Isotopic composition in percent =3051100100015 232U 99.14 3051100100016 233U 0.85 3051100100017 234U 0.004 3051100100018 targets (10micrograms) were prepared by electrodeposi- 3051100100019 tion and wrapped in 2.5 mm superpure Al-foil. 3051100100020 METHOD - The relative 'r-value' method was applied, starting 3051100100021 from the respective 235U fission yields with 99Mo 3051100100022 as internal standard. 3051100100023 (REC) The fission fragments were collected by the 3051100100024 'thin target-recoil-catcher technique'. 3051100100025 (CHSEP) For low yield products radiochemical methods 3051100100026 were used. 3051100100027 High yield products were measured by gamma-spectrometry3051100100028 DETECTOR (GELI). For high yield products. 3051100100029 (PROPC) End window gas flow proportional counter for 3051100100030 low yield products. 3051100100031 ANALYSIS 235U targets (2 micrograms) were irradiated together 3051100100032 with the 232U targets. activities of the 235U fission 3051100100033 products were measured in the same way as those of 3051100100034 232U. 3051100100035 The 235U fission product yields were taken from the 3051100100036 compilation of meek+rider. 3051100100037 MONIT-REF (,M.E.Meek+,R,NEDO-12154-1,1974) 3051100100038 STATUS (TABLE) Data from table 1 of Phys.Rev. C, 19, 1827. 3051100100039 HISTORY (19790921C) TL. 3051100100040 (20040311U) SD: corrected 4-dig. year and lower cases. 3051100100041 (20211018A) VS. Reference 75CALCUTTA,,138,1975 added. 3051100100042 Incident spectrum corrected. MONITOR->ANALYSIS in 001.3051100100043 SF8 and ERR-ANALYS corrected in 002. 3051100100044 ENDBIB 42 0 3051100100045 COMMON 1 3 3051100100046 EN-MIN 3051100100047 EV 3051100100048 0.55 3051100100049 ENDCOMMON 3 0 3051100100050 ENDSUBENT 49 0 3051100199999 SUBENT 30511002 20211108 32033051100200001 BIB 6 21 3051100200002 REACTION (92-U-232(N,F)ELEM/MASS,CUM,FY,,EPI) 3051100200003 MONITOR (92-U-232(N,F)42-MO-99,CUM,FY,,EPI) Assumed to be equal3051100200004 to the 99Mo yield from 235U. 3051100200005 MISC-COL (MISC) 'R'-value, R= A(99,5)*A(P,2)/A(99,2)*A(P,5) 3051100200006 where A(99,2),A(99,5)...activities of 99Mo as 3051100200007 fission product from 232U, 235U respectively, and 3051100200008 A(P,2),A(P,5) ... activities of product 'p' 3051100200009 from the fission of 232U,235U respectively. 3051100200010 CORRECTION A correction (2-5 percent) was applied for the 3051100200011 contribution from u-233 fissions. 3051100200012 The 'raw' yield data obtained from the r-values were 3051100200013 complemented with the missing yields by interpolation. 3051100200014 each wing of the mass distribution was then normalized 3051100200015 to sum up to 100 percent. 3051100200016 ERR-ANALYS (ERR-T) The total uncertainty determined from: 3051100200017 gamma counting statistics 2-3%; 3051100200018 compton subtraction 2-3%; 3051100200019 beta counting statistics 5-7%; 3051100200020 (ERR-1) chemical yield,self-absorpt 3%; 3051100200021 (ERR-2,1.,10.) u-235 evaluated yield data 1-10%. 3051100200022 HISTORY (20211018A) VS. SF8: SPA->EPI. ERR-ANALYS corrected. 3051100200023 ENDBIB 21 0 3051100200024 COMMON 2 3 3051100200025 MONIT ERR-1 3051100200026 PC/FIS PER-CENT 3051100200027 6.1400E+00 3. 3051100200028 ENDCOMMON 3 0 3051100200029 DATA 6 20 3051100200030 ELEMENT MASS DATA ERR-T MISC MISC-ERR 3051100200031 NO-DIM NO-DIM PC/FIS PC/FIS NO-DIM NO-DIM 3051100200032 38. 89. 6.01 0.12 1.939 0.040 3051100200033 38. 91. 7.12 0.20 1.855 0.052 3051100200034 40. 95. 6.30 0.06 1.490 0.014 3051100200035 40. 97. 4.94 0.06 1.263 0.017 3051100200036 42. 99. 4.15 1.000 3051100200037 44. 103. 1.10 0.02 0.522 0.010 3051100200038 44. 105. 0.24 0.03 0.360 0.040 3051100200039 47. 111. 0.009 0.0006 0.758 0.048 3051100200040 48. 115. 0.017 0.0008 2.420 0.014 3051100200041 50. 121. 0.008 0.0007 0.940 0.080 3051100200042 50. 125. 0.092 0.003 5.600 0.020 3051100200043 51. 127. 0.358 0.018 5.733 0.022 3051100200044 53. 131. 3.82 0.03 2.030 0.016 3051100200045 53. 132. 4.69 0.10 1.717 0.037 3051100200046 54. 133. 5.64 0.05 1.260 0.010 3051100200047 54. 135. 5.24 0.08 1.250 0.036 3051100200048 56. 140. 7.08 0.11 1.718 0.028 3051100200049 58. 141. 7.12 0.44 1.865 0.010 3051100200050 58. 143. 5.28 0.32 1.353 0.083 3051100200051 60. 147. 1.39 0.03 0.917 0.022 3051100200052 ENDDATA 22 0 3051100200053 ENDSUBENT 52 0 3051100299999 ENDENTRY 2 0 3051199999999