ENTRY 21595 20230319 231621595 0 1 SUBENT 21595001 20230319 231621595 1 1 BIB 12 40 21595 1 2 TITLE Mass yields in the fission of uranium-235 and 21595 1 3 plutonium-239 in the neutron spectrum of a gas-cooled 21595 1 4 fast reactor 21595 1 5 AUTHOR (M.Rajagopalan,H.S.Pruys,A.Gruetter,H.R.Von Gunten, 21595 1 6 E.A.Hermes,R.Richmond,E.Roessler,A.Schmid,P.Wydler) 21595 1 7 REFERENCE (J,NSE,58,414,1975) - final publ. 21595 1 8 (P,INDC(SEC)-43,83,1974) - prelim.data 21595 1 9 ((P,INDC(SWT)-6,15,1974)=(P,NEANDC(OR)-140,15,1974)) 21595 1 10 - prelim.data 21595 1 11 INSTITUTE (2SWTWUR) 21595 1 12 FACILITY (REAC,2SWTWUR) PROTEUS fast reactor, Wuerenlingen. 21595 1 13 INC-SOURCE (REAC) Gas-cooled fast reactor. 21595 1 14 INC-SPECT Gas-cooled fast reactor spectrum with a flux 21595 1 15 of 3 10*9 n/cm*2/sec. A graph of the spectrum is 21595 1 16 shown with a broad peak from 0.01 MeV to 1.0 MeV. 21595 1 17 The median energy is quoted as 180 keV. 21595 1 18 SAMPLE Several 40 mg samples of uranium dioxide, enriched 21595 1 19 to 97.5% U-235, and plutonium dioxide, enriched 21595 1 20 to 92.1% Pu-239. 21595 1 21 Irradiation were performed in the fast zone of the 21595 1 22 PROTEUS reactor. The uranium and plutonium samples 21595 1 23 were irradiated for 1 and 2 hours, respectively. 21595 1 24 METHOD (ACTIV) Gamma-ray spectroscopy of fission products 21595 1 25 after chemical separation of fission products in 21595 1 26 aqueous solution. Only zirconium, niobium, tellurium 21595 1 27 and iodine were partially separated, all other 21595 1 28 products were fully extracted. 21595 1 29 DETECTOR (GELI) A 40 cm*3 Ge(Li) spectrometer, resolution 21595 1 30 of 2.0 keV at 1.3 MeV. Counting started 80 min after 21595 1 31 the irradiation and continued for 10 days. 21595 1 32 ANALYSIS Relative yields are converted to absolute yields by 21595 1 33 normalizing the total fission yields of all nuclides 21595 1 34 in the heavy peak to 100%. The measured yields 21595 1 35 amount to 66% of the total yields in the heavy peak, 21595 1 36 yields of missing mass chains were interpolated 21595 1 37 An error of 10 to 20% was assigned to the 21595 1 38 interpolated yields. 21595 1 39 HISTORY (19800619C) 21595 1 40 (20200906A) SD: Entry revised. 21595 1 41 (20230319A) SD: Correction in Subent 002. 21595 1 42 ENDBIB 40 0 21595 1 43 NOCOMMON 0 0 21595 1 44 ENDSUBENT 43 0 21595 199999 SUBENT 21595002 20230319 231621595 2 1 BIB 9 33 21595 2 2 REACTION (92-U-235(N,F)MASS,CHN,FY,,FST) 21595 2 3 ANALYSIS Relative yields were converted to absolute yields by 21595 2 4 normalizing the total fission yields of all nuclides in21595 2 5 the heavy peak to 100%. The measured yields amount to 21595 2 6 ~66% of the total yield in the heavy peak. The yields 21595 2 7 of the missing mass chains were interpolated. 21595 2 8 MONITOR (92-U-235(N,F)ELEM/MASS,CUM,FY) 21595 2 9 MONIT-REF (,M.E.Meek+,R,NEDO-12154-1,1974) 21595 2 10 REL-REF (A,13270016,F.L.Lisman+,J,NSE,42,191,1970) 21595 2 11 (A,13270017,F.L.Lisman+,J,NSE,42,191,1970) 21595 2 12 (A,20768002,J.G.Cuninghame+,R,AERE-R-6862,1972) 21595 2 13 (A,12771002,R.P.Larsen+,J,NSE,54,263,1974) 21595 2 14 (A,,M.E.Meek+,R,NEDO-12154-1,1974) - All values 21595 2 15 compared with data from this ref. 21595 2 16 FLAG (1.) In Tbl.I result was assigned to Kr and Rb but in 21595 2 17 Tbl.III value compared with Kr from F.L.Lisman+ 21595 2 18 (2.) In Tbl.I result was assigned to Sr, Y but in 21595 2 19 Tbl.III value compared with Sr from M.E.Meek+ 21595 2 20 (3.) In Tbl.I result was assigned to Zr, Nb but in 21595 2 21 Tbl.III value compared with Zr from F.L.Lisman+ 21595 2 22 (4.) In Tbl.I result was assigned to Te, I but in 21595 2 23 Tbl.III value compared with Xe from F.L.Lisman+ 21595 2 24 (5.) In Tbl.I result was assigned to Ba, Ce but in 21595 2 25 Tbl.III value compared with estimated Ce from 21595 2 26 F.L.Lisman+ and Ce from J.G.Cuninghame+ 21595 2 27 ERR-ANALYS (DATA-ERR) One standard deviation, including 21595 2 28 uncertainties in analysis of absolute yields and 21595 2 29 STATUS (TABLE) Table I from Nucl.Sci.Eng.,58(1975)414. 21595 2 30 (DEP,21595004) R-values 21595 2 31 HISTORY (20200906A) SD: REACTION code modified. REACTION (2) 21595 2 32 added. MONITOR added. STATUS updated. 21595 2 33 (20230319A) SD: SF4=ELEM/MASS -> MASS in REACTION (1) 21595 2 34 code. Subent 002 was split in two. Subent 004 added. 21595 2 35 ENDBIB 33 0 21595 2 36 COMMON 1 3 21595 2 37 EN-MEAN 21595 2 38 MEV 21595 2 39 0.180 21595 2 40 ENDCOMMON 3 0 21595 2 41 DATA 4 26 21595 2 42 MASS DATA DATA-ERR FLAG 21595 2 43 NO-DIM PC/FIS PC/FIS NO-DIM 21595 2 44 87. 2.89 0.10 21595 2 45 88. 4.45 0.10 1. 21595 2 46 91. 5.64 0.12 21595 2 47 92. 5.77 0.12 2. 21595 2 48 93. 6.23 0.13 21595 2 49 94. 6.12 0.27 21595 2 50 95. 6.49 0.19 21595 2 51 97. 6.05 0.13 3. 21595 2 52 99. 6.23 0.13 21595 2 53 101. 5.32 0.13 21595 2 54 103. 3.21 0.11 21595 2 55 104. 1.87 0.11 21595 2 56 105. 1.17 0.13 21595 2 57 131. 3.07 0.08 21595 2 58 132. 4.59 0.10 4. 21595 2 59 133. 7.10 0.14 21595 2 60 134. 7.81 0.17 4. 21595 2 61 135. 6.68 0.17 21595 2 62 139. 6.54 0.15 21595 2 63 141. 5.56 0.18 5. 21595 2 64 142. 5.59 0.12 21595 2 65 143. 5.72 0.20 21595 2 66 146. 2.76 0.12 21595 2 67 147. 2.28 0.13 21595 2 68 149. 1.06 0.03 21595 2 69 151. 0.43 0.02 21595 2 70 ENDDATA 28 0 21595 2 71 ENDSUBENT 70 0 21595 299999 SUBENT 21595003 20230319 231621595 3 1 BIB 9 18 21595 3 2 REACTION (((94-PU-239(N,F)ELEM/MASS,CUM,FY,,FST)/ 21595 3 3 (94-PU-239(N,F)56-BA-140,CUM,FY,,FST))// 21595 3 4 ((94-PU-239(N,F)ELEM/MASS,CUM,FY)/ 21595 3 5 (94-PU-239(N,F)56-BA-140,CUM,FY))) 21595 3 6 RESULT (RVAL) 21595 3 7 MONITOR ((94-PU-239(N,F)56-BA-140,CUM,FY,,FST)/ 21595 3 8 (94-PU-239(N,F)56-BA-140,CUM,FY)) 21595 3 9 MONIT-REF (,M.E.Meek+,R,NEDO-12154-1,1974) 21595 3 10 FLAG (1.) In Tbl.IV result was assigned to Sr and Y 21595 3 11 (2.) In Tbl.IV result was assigned to Mo and Tc 21595 3 12 (3.) In Tbl.IV result was assigned to Ba and Ce 21595 3 13 COMMENT Not enough mass chains could be analysed to perform 21595 3 14 a satisfactory normalization. 21595 3 15 ERR-ANALYS (ERR-S) statistical errors 21595 3 16 STATUS (TABLE) Table IV from Nucl.Sci.Eng.,58(1975)414. 21595 3 17 HISTORY (20200906A) SD: REACTION code was modified. 21595 3 18 STATUS updated. Col. ELEMENT added. 21595 3 19 (20230319U) SD: EN-MEAN-NM and EN-DUM-DN added. 21595 3 20 ENDBIB 18 0 21595 3 21 COMMON 2 3 21595 3 22 EN-MEAN-NM EN-DUM-DN 21595 3 23 MEV EV 21595 3 24 0.180 0.0253 21595 3 25 ENDCOMMON 3 0 21595 3 26 DATA 5 20 21595 3 27 MASS ELEMENT DATA ERR-S FLAG 21595 3 28 NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM 21595 3 29 91. 38. 0.497 0.007 1. 21595 3 30 92. 38. 0.589 0.008 1. 21595 3 31 93. 39. 0.640 0.015 21595 3 32 95. 40. 1.057 0.036 21595 3 33 97. 40. 1.068 0.017 21595 3 34 99. 42. 1.169 0.023 2. 21595 3 35 101. 43. 1.648 0.085 21595 3 36 103. 44. 2.468 0.053 21595 3 37 105. 44. 6.798 0.144 21595 3 38 132. 53. 1.491 0.068 21595 3 39 133. 53. 1.244 0.021 21595 3 40 134. 53. 0.970 0.023 21595 3 41 135. 53. 1.228 0.021 21595 3 42 139. 56. 1.117 0.080 21595 3 43 141. 56. 1.139 0.020 3. 21595 3 44 142. 57. 1.000 0.017 21595 3 45 143. 58. 0.839 0.022 21595 3 46 147. 60. 0.989 0.021 21595 3 47 149. 60. 1.415 0.259 21595 3 48 151. 61. 2.091 0.155 21595 3 49 ENDDATA 22 0 21595 3 50 ENDSUBENT 49 0 21595 399999 SUBENT 21595004 20230319 231621595 4 1 BIB 9 21 21595 4 2 REACTION (((92-U-235(N,F)ELEM/MASS,CUM,FY,,FST)/ 21595 4 3 (92-U-235(N,F)56-BA-140,CUM,FY,,FST))// 21595 4 4 ((92-U-235(N,F)ELEM/MASS,CUM,FY)/ 21595 4 5 (92-U-235(N,F)56-BA-140,CUM,FY))) 21595 4 6 RESULT (RVAL) 21595 4 7 ANALYSIS Relative yields were converted to absolute yields by 21595 4 8 normalizing the total fission yields of all nuclides in21595 4 9 the heavy peak to 100%. The measured yields amount to 21595 4 10 ~66% of the total yield in the heavy peak. The yields 21595 4 11 of the missing mass chains were interpolated. 21595 4 12 MONITOR ((92-U-235(N,F)56-BA-140,CUM,FY,,FST)/ 21595 4 13 (92-U-235(N,F)56-BA-140,CUM,FY)) 21595 4 14 MONIT-REF (,M.E.Meek+,R,NEDO-12154-1,1974) 21595 4 15 FLAG (1.) In Tbl.I result was assigned to Kr and Rb 21595 4 16 (2.) In Tbl.I result was assigned to Sr, Y 21595 4 17 (3.) In Tbl.I result was assigned to Zr, Nb 21595 4 18 (4.) In Tbl.I result was assigned to Te, I 21595 4 19 (5.) In Tbl.I result was assigned to Ba, Ce 21595 4 20 ERR-ANALYS (ERR-S) statistical errors 21595 4 21 STATUS (TABLE) Table I from Nucl.Sci.Eng.,58(1975)414. 21595 4 22 HISTORY (20230319T) SD: Part of Subent 002. 21595 4 23 ENDBIB 21 0 21595 4 24 COMMON 2 3 21595 4 25 EN-MEAN-NM EN-DUM-DN 21595 4 26 MEV EV 21595 4 27 0.180 0.0253 21595 4 28 ENDCOMMON 3 0 21595 4 29 DATA 5 26 21595 4 30 MASS ELEMENT DATA ERR-S FLAG 21595 4 31 NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM 21595 4 32 87. 36. 1.140 0.033 21595 4 33 88. 36. 1.234 0.017 1. 21595 4 34 91. 38. 0.957 0.014 21595 4 35 92. 38. 0.974 0.014 2. 21595 4 36 93. 39. 0.983 0.015 21595 4 37 94. 39. 0.959 0.040 21595 4 38 95. 40. 1.010 0.025 21595 4 39 97. 40. 1.019 0.014 3. 21595 4 40 99. 42. 1.021 0.014 21595 4 41 101. 43. 1.059 0.018 21595 4 42 103. 44. 1.028 0.023 21595 4 43 104. 43. 1.032 0.057 21595 4 44 105. 44. 1.188 0.032 21595 4 45 131. 53. 1.088 0.020 21595 4 46 132. 52. 1.093 0.015 4. 21595 4 47 133. 53. 1.053 0.015 21595 4 48 134. 52. 1.022 0.014 4. 21595 4 49 135. 53. 1.012 0.014 21595 4 50 139. 56. 1.014 0.014 21595 4 51 141. 56. 0.948 0.026 5. 21595 4 52 142. 57. 0.946 0.015 21595 4 53 143. 58. 0.962 0.030 21595 4 54 146. 59. 0.926 0.039 21595 4 55 147. 60. 1.004 0.056 21595 4 56 149. 60. 0.970 0.017 21595 4 57 151. 61. 1.020 0.032 21595 4 58 ENDDATA 28 0 21595 4 59 ENDSUBENT 58 0 21595 499999 ENDENTRY 4 0 2159599999999