ENTRY 21723 20161001 22532172300000001 SUBENT 21723001 20161001 22532172300100001 BIB 11 32 2172300100002 INSTITUTE (2SWTWUR) Eidgenoessisches Institut fuer Reaktor- 2172300100003 Forschung. 2172300100004 REFERENCE (J,NSE,79,167,198110) - final publ. 2172300100005 ((P,NEANDC(OR)-154,12,1980)=(P,INDC(SWT)-14,12,1980)) 2172300100006 Abstract,data for Mo-99,Te-132. 2172300100007 REL-REF (R,,J.K.Dickens+,J,NIM,175,535,1980) - decay-data 2172300100008 of Mo-99 2172300100009 (R,,J.K.Dickens+,J,NSE,73,42,1980) - decay-data of 2172300100010 Sr-92, Y-93, Zr-97, Ba-139, Ba-140 2172300100011 (R,,U.Reus+,R,GSI-79-2,1979) - decay-data of the rest 2172300100012 of the products 2172300100013 - G.Erdtmann and W.Soyka, 'Die gamma-Linien der 2172300100014 Radionuklide,' Chemie, Mannheim, New York (1979). - 2172300100015 decay-data of Cd-115m 2172300100016 - 'A Handbook of Radioactivity Measurement Procedures,2172300100017 NCRP Report No. 58, National Council on Radiation' 2172300100018 Protection and Measurements (1978). - decay-data of 2172300100019 Te-132, Ce-141, Ce-143, Sm-153 2172300100020 AUTHOR (H.N.Erten,A.Gruetter,E.Roessler,H.R.von Gunten) 2172300100021 TITLE Mass distribution in the reactor-neutron-induced 2172300100022 fission of thorium-232 2172300100023 FACILITY (REAC,2SWTWUR) Swimming pool reactor SAPHIR. 2172300100024 INC-SOURCE (REAC) 2172300100025 PART-DET (DG) Decay gammas of the fission products. 2172300100026 ADD-RES (COMP) Comparison with literature both for reactor 2172300100027 neutron and monoenergetic neutron induced fission 2172300100028 of Th-232. 2172300100029 CORRECTION .For Ag-113-m and Cd-115-m formation. 2172300100030 HISTORY (19810119C) G.C. 2172300100031 (19811201A) T.N - 002 was changed and 003 was added. 2172300100032 (20161001A) SD:Updated to new date formats,lower case. 2172300100033 Entry re-compiled. 2172300100034 ENDBIB 32 0 2172300100035 COMMON 1 3 2172300100036 EN-DUMMY 2172300100037 MEV 2172300100038 3.3 2172300100039 ENDCOMMON 3 0 2172300100040 ENDSUBENT 39 0 2172300199999 SUBENT 21723002 20161001 22532172300200001 BIB 13 42 2172300200002 REACTION (90-TH-232(N,F)ELEM/MASS,CUM,FY,,FIS) 2172300200003 MONITOR ((MONIT)90-TH-232(N,F)42-MO-99,CUM,FY,,FIS) 2172300200004 (92-U-235(N,F)ELEM/MASS,CUM,FY,,FIS) 2172300200005 MONIT-REF (,B.F.Rider,R,NEDO-12154-3B,1980)-The thermal-neutron 2172300200006 -induced fission yields of U-238 used in the R method 2172300200007 INC-SPECT Fission neutron spectrum. The thermal neutron flux was 2172300200008 ~1.6 x 10**13 n/cm2/s and the fast neutron flux was 2172300200009 ~3.3 x 10**12 ncm2/s. 2172300200010 SAMPLE .Th-232 100%, Th(NO3)4.x H2O, 50 mg 2172300200011 .U-235, 99.61%, UO2(NO3)2, 14.4 mu-g. 2172300200012 The sources were wrapped in thin (~4 mg/cm2) aluminum 2172300200013 foils and were placed in quartz tubes. 2172300200014 Samples were irradiated simultaneously, but in 2172300200015 separated positions, in the SAPHIR reactor for 1 h. 2172300200016 METHOD (CHSEP) Radiochemical separation of the fission 2172300200017 products from Th-232(n,f) and U-235(n,f). The 2172300200018 quantity 2172300200019 R=Ast(Th)*A2/(Ast(U)*A4) is measured, were 2172300200020 Ast(Th)= activity of product in Th-232(n,f), 2172300200021 A2= activity of Mo-99 in U-235(n,f), 2172300200022 Ast(U)= activity of product in U-235(n,f), 2172300200023 compilation by Rider(NEDO 12154-3B) was used.2172300200024 A4= activity of Mo-99 in Th-232(n,f). 2172300200025 The yields in thorium fission were then determined 2172300200026 according to Yi(Th) = R*Yi(U)*Yst(Th)/Yst(U) 2172300200027 (GSPEC) gamma-ray spectroscopy. 2172300200028 DETECTOR (GELI ) Ge(Li) detectors. 45 cm3 and 54 cm3. 2172300200029 Resolution about 2 keV at 1332 keV. 2172300200030 (PROPC) Low background proportional counter for Sc-89, 2172300200031 Y-90, and RU-106 counting. 2172300200032 ANALYSIS Gaussian peak fit and decay analysis. 2172300200033 ERR-ANALYS (ERR-T) Total error given, including the statistical 2172300200034 error, the errors in the U-235 reference yields and 2172300200035 (MONIT-ERR) Normalization uncertainty 2172300200036 MISC-COL (MISC1) R-value Y1*Y2/(Y3-Y4) measured. 2172300200037 (MISC2) Number of determinations. 2172300200038 FLAG (1.) Values based on R-method are omitted. 2172300200039 (2.) Determined by beta counting. 2172300200040 (3.) Determined by direct gamma-ray spectroscopy. 2172300200041 STATUS (TABLE) Data taken from Tbl.III,IV of NSE,79,167,1981 2172300200042 (DEP,21723004) data for normalization 2172300200043 HISTORY (20161001A) SD: BIB update. 2172300200044 ENDBIB 42 0 2172300200045 COMMON 4 3 2172300200046 ELEM-NRM MASS-NRM MONIT MONIT-ERR 2172300200047 NO-DIM NO-DIM PC/FIS PC/FIS 2172300200048 42. 99. 2.98 0.15 2172300200049 ENDCOMMON 3 0 2172300200050 DATA 9 36 2172300200051 ELEMENT MASS ISOMER DATA ERR-T MISC1 2172300200052 MISC1-ERR MISC2 FLAG 2172300200053 NO-DIM NO-DIM NO-DIM PC/FIS PC/FIS NO-DIM 2172300200054 NO-DIM NO-DIM NO-DIM 2172300200055 32. 77. 0. 0.0113 0.0017 2172300200056 4. 1. 2172300200057 32. 78. 0.073 0.011 2172300200058 4. 1. 2172300200059 35. 83. 2.13 0.20 8.092172300200060 0.61 3. 2172300200061 35. 84. 3.84 0.31 8.192172300200062 0.64 3. 2172300200063 38. 89. 7.50 0.54 3.172172300200064 0.15 5. 2. 2172300200065 38. 90. 8.21 0.79 2.92172300200066 0.23 2. 2. 2172300200067 38. 91. 7.59 0.42 2.612172300200068 0.03 3. 2172300200069 38. 92. 6.80 0.41 2.352172300200070 0.05 3. 2172300200071 39. 93. 6.76 0.54 2.162172300200072 0.03 2. 2172300200073 40. 95. 5.63 0.31 1.762172300200074 0.02 2. 3. 2172300200075 40. 97. 4.50 0.35 1.552172300200076 0.08 2. 3. 2172300200077 44. 103. 0.158 0.009 0.1062172300200078 0.002 4. 2172300200079 44. 105. 0.0561 0.0046 0.1182172300200080 0.002 4. 2172300200081 44. 106. 0.0487 0.0085 0.2472172300200082 0.4 3. 2. 2172300200083 46. 109. 0.0563 0.0096 3.482172300200084 0.08 5. 2172300200085 46. 112. 0.0774 0.0042 12.132172300200086 0.15 5. 2172300200087 47. 111. 0.0703 0.0056 7.52172300200088 0.15 5. 2172300200089 47. 113. 0. 0.0785 0.0079 11.682172300200090 0.35 5. 2172300200091 48. 115. 0. 0.0506 0.0061 11.212172300200092 0.11 5. 2172300200093 48. 117. 0. 0.050 0.012 12.972172300200094 0.2 5. 2172300200095 48. 117. 1. 0.0227 0.0053 10.32172300200096 0.46 5. 2172300200097 51. 127. 0.0809 0.0078 1.322172300200098 0.02 4. 2172300200099 51. 129. 0.310 0.025 0.8432172300200100 0.008 4. 2172300200101 52. 132. 3.16 0.17 1.52172300200102 0.02 13. 2172300200103 53. 131. 1.80 0.10 1.272172300200104 0.02 3. 2172300200105 53. 134. 0. 6.23 0.56 1.632172300200106 0.07 3. 2172300200107 53. 135. 6.14 0.36 1.992172300200108 0.03 3. 2172300200109 56. 139. 7.11 0.42 2.282172300200110 0.05 3. 2172300200111 56. 140. 8.12 0.45 2.672172300200112 0.03 3. 2172300200113 58. 141. 7.36 0.47 2.592172300200114 0.09 4. 2172300200115 58. 143. 6.96 0.46 2.382172300200116 0.09 4. 2172300200117 58. 144. 7.79 0.49 2.962172300200118 0.09 4. 2172300200119 60. 147. 3.05 0.20 2.742172300200120 0.11 4. 2172300200121 61. 149. 1.16 0.07 2.182172300200122 0.06 4. 2172300200123 61. 151. 0.396 0.03 1.922172300200124 0.1 4. 2172300200125 62. 153. 0.106 0.012 1.332172300200126 0.13 3. 2172300200127 ENDDATA 76 0 2172300200128 ENDSUBENT 127 0 2172300299999 SUBENT 21723003 20161001 22532172300300001 BIB 4 6 2172300300002 REACTION (90-TH-232(N,F)48-CD-117,CUM,FY,,FIS) 2172300300003 MISC-COL (MISC ) Number of determinations. 2172300300004 ERR-ANALYS (ERR-T) Total error. See description in Subent 002 and 2172300300005 STATUS in Subent 003. 2172300300006 STATUS (TABLE) Data taken from Tbl.III of NSE,79,167,1981 2172300300007 (DEP,21723002) Sum of values for Cd-117g and Cd-117m. 2172300300008 ENDBIB 6 0 2172300300009 NOCOMMON 0 0 2172300300010 DATA 5 1 2172300300011 ELEMENT MASS DATA ERR-T MISC 2172300300012 NO-DIM NO-DIM PC/FIS PC/FIS NO-DIM 2172300300013 48. 117. 0.073 0.017 5. 2172300300014 ENDDATA 3 0 2172300300015 ENDSUBENT 14 0 2172300399999 SUBENT 21723004 20161001 22532172300400001 BIB 12 26 2172300400002 REACTION (90-TH-232(N,F)ELEM/MASS,IND,FY,,FIS) 2172300400003 DECAY-DATA (42-MO-99,66.0HR,DG) 2172300400004 (52-TE-132,78.2HR,DG) 2172300400005 INC-SPECT Fission neutrons. The irradiations lasted for ~70 h 2172300400006 and the fission rate amounted to ~1400 fiss/s. 2172300400007 SAMPLE Uniformly electroplated deposits of 6 cm diameter, 2172300400008 containing about 15 mg of Th-232 2172300400009 METHOD (CHSEP) The number of fissions is directly counted, 2172300400010 Mo and Te are chemically separated and gamma-counted. 2172300400011 DETECTOR (FISCH) Aluminium parallel plate type fission counter, 2172300400012 (GELI) Ge(Li)-detectors, 45 cm3, resolution about 2172300400013 2 keV at 1332 keV , and 54 cm3, resolution about 2172300400014 2 keV at 1332. keV. 2172300400015 ANALYSIS .Gaussian peak fit and decay analysis. 2172300400016 COMMENT .Comparison with literature values. 2172300400017 ERR-ANALYS (ERR-T) Total error given. It includes - 2172300400018 (ERR-S) statistical error 2172300400019 in fission fragment counting = 1% 2172300400020 in activity measurements = 2% 2172300400021 in chemical yields = 3% 2172300400022 value in common section was estimated by compiler. 2172300400023 (ERR-SYS) The total systematic error is 4% from uncer- 2172300400024 tainties in decay schemes and detector efficiencies. 2172300400025 MISC-COL (MISC) Number of experiments done. 2172300400026 STATUS (TABLE) Data taken from from Tbl.I of NSE,79,167,1981 2172300400027 HISTORY (20161001T) SD: Subent was added from 21712.002. 2172300400028 ENDBIB 26 0 2172300400029 COMMON 3 3 2172300400030 ERR-S ERR-SYS MISC 2172300400031 PER-CENT PER-CENT NO-DIM 2172300400032 3.7 4. 10. 2172300400033 ENDCOMMON 3 0 2172300400034 DATA 4 2 2172300400035 ELEMENT MASS DATA ERR-T 2172300400036 NO-DIM NO-DIM PC/FIS PC/FIS 2172300400037 42. 99. 2.98 0.15 2172300400038 52. 132. 2.76 0.16 2172300400039 ENDDATA 4 0 2172300400040 ENDSUBENT 39 0 2172300499999 ENDENTRY 4 0 2172399999999