ENTRY 12843 20050718 20050909 13361284300000001 SUBENT 12843001 20050718 20050909 13361284300100001 BIB 16 24 1284300100002 INSTITUTE (1CANALA) 1284300100003 REFERENCE (J,PR/C,28,1212,1983) 1284300100004 AUTHOR (S.T.Lam,L.L.Yu,H.W.Fielding,W.K.Dawson,G.C.Neilson) 1284300100005 TITLE Neutron induced fission of 232-Th near threshold. 1284300100006 FACILITY (VDG) 1284300100007 METHOD (TOF) Time-of-flight 1284300100008 INC-SOURCE (P-T) 1284300100009 MONITOR Cf-252 source was used for calibration. 1284300100010 DETECTOR (SOLST) Ortec heavy-ion surface barrier detector. 1284300100011 SAMPLE Large spherical 232Th -66 cm2 and 490 microgms/cm2. 1284300100012 ANALYSIS See Ref-Phys.Rev. C22,2485,1980. 1284300100013 Fragment masses were deduced from fragment energies 1284300100014 and fragment flight times. 1284300100015 ERR-ANALYS (ERR-S) Statistical uncertainties. 1284300100016 CORRECTION The pulse-height defect of the heavy-ion detector 1284300100017 was corrected by the method described in Ref- 1284300100018 H.W.Schmitt+,Phys.Rev.137B,837,1965. 1284300100019 COMMENT Fission-fragment yield peak-to-valley ratio at 1.6, 1284300100020 3.1 and 5.2 MeV were 129+-35, 63+-11 and 29+-3 1284300100021 respectively. 1284300100022 STATUS (APRVD) S.T.Lam, 84/3/12. 1284300100023 HISTORY (19840112C) 1284300100024 (20050718C) DR Format updated and reference corrected 1284300100025 SF8 deleted (FIS) 1284300100026 ENDBIB 24 0 1284300100027 NOCOMMON 0 0 1284300100028 ENDSUBENT 27 0 1284300199999 SUBENT 12843002 19840322 20050909 13361284300200001 BIB 1 1 1284300200002 REACTION (90-TH-232(N,F),,AP,LF) 1284300200003 ENDBIB 1 0 1284300200004 NOCOMMON 0 0 1284300200005 DATA 5 3 1284300200006 EN +EN-RSL -EN-RSL DATA ERR-S 1284300200007 MEV MEV MEV NO-DIM NO-DIM 1284300200008 1.6 0.10 0.13 88.4 0.2 1284300200009 3.1 0.15 0.15 89.3 0.2 1284300200010 5.2 0.25 0.25 89.0 0.2 1284300200011 ENDDATA 5 0 1284300200012 ENDSUBENT 11 0 1284300299999 SUBENT 12843003 19840322 20050909 13361284300300001 BIB 1 1 1284300300002 REACTION (90-TH-232(N,F),,AP,HF) 1284300300003 ENDBIB 1 0 1284300300004 NOCOMMON 0 0 1284300300005 DATA 5 3 1284300300006 EN +EN-RSL -EN-RSL DATA ERR-S 1284300300007 MEV MEV MEV NO-DIM NO-DIM 1284300300008 1.6 0.10 0.13 141.5 0.2 1284300300009 3.1 0.15 0.15 141.5 0.2 1284300300010 5.2 0.25 0.25 140.3 0.2 1284300300011 ENDDATA 5 0 1284300300012 ENDSUBENT 11 0 1284300399999 SUBENT 12843004 19840322 20050909 13361284300400001 BIB 3 7 1284300400002 REACTION (90-TH-232(N,F),,AKE,LF) 1284300400003 CORRECTION The light and heavy fragment mean kinetic energies 1284300400004 were corrected from loss in the target. 1284300400005 COMMENT The mean kinetic energies for the light fission 1284300400006 fragment group were determined from the data by 1284300400007 excluding the events in the valley region due to 1284300400008 poor statistics. 1284300400009 ENDBIB 7 0 1284300400010 NOCOMMON 0 0 1284300400011 DATA 5 3 1284300400012 EN +EN-RSL -EN-RSL DATA ERR-S 1284300400013 MEV MEV MEV MEV MEV 1284300400014 1.6 0.10 0.13 95.76 0.02 1284300400015 3.1 0.15 0.15 96.86 0.02 1284300400016 5.2 0.25 0.25 98.08 0.02 1284300400017 ENDDATA 5 0 1284300400018 ENDSUBENT 17 0 1284300499999 SUBENT 12843005 19840322 20050909 13361284300500001 BIB 3 7 1284300500002 REACTION (90-TH-232(N,F),,AKE,HF) 1284300500003 CORRECTION The light and heavy fragment mean kinetic energies 1284300500004 were corrected from loss in the target. 1284300500005 COMMENT The mean kinetic energies for the light fission 1284300500006 fragment group were determined from the data by 1284300500007 excluding the events in the valley region due to 1284300500008 poor statistics. 1284300500009 ENDBIB 7 0 1284300500010 NOCOMMON 0 0 1284300500011 DATA 5 3 1284300500012 EN +EN-RSL -EN-RSL DATA ERR-S 1284300500013 MEV MEV MEV MEV MEV 1284300500014 1.6 0.10 0.13 63.10 0.08 1284300500015 3.1 0.15 0.15 64.17 0.08 1284300500016 5.2 0.25 0.25 65.40 0.10 1284300500017 ENDDATA 5 0 1284300500018 ENDSUBENT 17 0 1284300599999 SUBENT 12843006 19840322 20050909 13361284300600001 BIB 2 6 1284300600002 REACTION (90-TH-232(N,F),,AKE,FF) 1284300600003 ERR-ANALYS Statistical uncertainty for kinetic energy= 100KeV. 1284300600004 Systematic uncertainty for kinetic energy = 1 MEV. 1284300600005 This main source of error in the energy determination 1284300600006 was due to the correction of pulse-height defect of 1284300600007 the heavy-ion detector. 1284300600008 ENDBIB 6 0 1284300600009 NOCOMMON 0 0 1284300600010 DATA 5 3 1284300600011 EN +EN-RSL -EN-RSL DATA ERR-S 1284300600012 MEV MEV MEV MEV MEV 1284300600013 1.6 0.10 0.13 158.86 0.08 1284300600014 3.1 0.15 0.15 161.03 0.08 1284300600015 5.2 0.25 0.25 163.48 0.10 1284300600016 ENDDATA 5 0 1284300600017 ENDSUBENT 16 0 1284300699999 SUBENT 12843007 19840322 20050909 13361284300700001 BIB 3 10 1284300700002 REACTION (90-TH-232(N,F),PRE,AKE,FF) 1284300700003 ERR-ANALYS Statistical uncertainty for kinetic energy= 100KeV. 1284300700004 Systematic uncertainty for kinetic energy = 1 MEV. 1284300700005 This main source of error in the energy determination 1284300700006 was due to the correction of pulse-height defect of 1284300700007 the heavy-ion detector. 1284300700008 ASSUMED (ASSUM,90-TH-232(N,F),,NU) 1284300700009 In calculating the primary(or pre-) neutron average 1284300700010 total kinetic energies the average number of neutrons 1284300700011 per fission were assumed to be 2.35. 1284300700012 ENDBIB 10 0 1284300700013 COMMON 1 3 1284300700014 ASSUM 1284300700015 NO-DIM 1284300700016 2.35 1284300700017 ENDCOMMON 3 0 1284300700018 DATA 5 3 1284300700019 EN +EN-RSL -EN-RSL DATA ERR-S 1284300700020 MEV MEV MEV MEV MEV 1284300700021 1.6 0.10 0.13 160.63 0.08 1284300700022 3.1 0.15 0.15 162.83 0.08 1284300700023 5.2 0.25 0.25 165.30 0.10 1284300700024 ENDDATA 5 0 1284300700025 ENDSUBENT 24 0 1284300799999 SUBENT 12843008 19840322 20050909 13361284300800001 BIB 2 2 1284300800002 REACTION (90-TH-232(N,F)MASS,CHN,FY) 1284300800003 STATUS Data obtained from the author on tape Nov. 15,83. 1284300800004 ENDBIB 2 0 1284300800005 NOCOMMON 0 0 1284300800006 DATA 5 156 1284300800007 EN MASS-MIN MASS-MAX DATA ERR-S 1284300800008 MEV NO-DIM NO-DIM PC/FIS PER-CENT 1284300800009 1.6 64. 65. 1.200E-01 40.8 1284300800010 1.6 66. 67. 6.000E-02 57.7 1284300800011 1.6 68. 69. 4.000E-02 70.7 1284300800012 1.6 70. 71. 1.200E-01 40.8 1284300800013 1.6 72. 73. 4.600E-01 20.9 1284300800014 1.6 74. 75. 4.800E-01 20.4 1284300800015 1.6 76. 77. 1.280E+00 12.5 1284300800016 1.6 78. 79. 2.080E+00 9.8 1284300800017 1.6 80. 81. 3.240E+00 7.9 1284300800018 1.6 82. 83. 4.160E+00 6.9 1284300800019 1.6 84. 85. 4.980E+00 6.3 1284300800020 1.6 86. 87. 5.600E+00 6.0 1284300800021 1.6 88. 89. 5.800E+00 5.9 1284300800022 1.6 90. 91. 5.920E+00 5.8 1284300800023 1.6 92. 93. 4.720E+00 6.5 1284300800024 1.6 94. 95. 3.620E+00 7.4 1284300800025 1.6 96. 97. 3.000E+00 8.2 1284300800026 1.6 98. 99. 2.120E+00 9.7 1284300800027 1.6 100. 101. 8.400E-01 15.4 1284300800028 1.6 102. 103. 6.200E-01 18.0 1284300800029 1.6 104. 105. 4.200E-01 21.8 1284300800030 1.6 106. 107. 1.400E-01 37.8 1284300800031 1.6 108. 109. 1.200E-01 40.8 1284300800032 1.6 110. 111. 8.000E-02 50.0 1284300800033 1.6 112. 113. 1.800E-01 33.3 1284300800034 1.6 114. 115. 1.000E-01 44.7 1284300800035 1.6 116. 117. 4.000E-02 70.7 1284300800036 1.6 118. 119. 1.400E-01 37.8 1284300800037 1.6 120. 121. 1.000E-01 44.7 1284300800038 1.6 122. 123. 2.000E-01 31.6 1284300800039 1.6 124. 125. 3.200E-01 25.0 1284300800040 1.6 126. 127. 6.000E-01 18.3 1284300800041 1.6 128. 129. 1.100E+00 13.5 1284300800042 1.6 130. 131. 1.680E+00 10.9 1284300800043 1.6 132. 133. 2.680E+00 8.6 1284300800044 1.6 134. 135. 3.020E+00 8.1 1284300800045 1.6 136. 137. 4.340E+00 6.8 1284300800046 1.6 138. 139. 4.880E+00 6.4 1284300800047 1.6 140. 141. 5.340E+00 6.1 1284300800048 1.6 142. 143. 5.960E+00 5.8 1284300800049 1.6 144. 145. 5.000E+00 6.3 1284300800050 1.6 146. 147. 4.620E+00 6.6 1284300800051 1.6 148. 149. 3.240E+00 7.9 1284300800052 1.6 150. 151. 2.260E+00 9.4 1284300800053 1.6 152. 153. 1.760E+00 10.7 1284300800054 1.6 154. 155. 9.000E-01 14.9 1284300800055 1.6 156. 157. 3.600E-01 23.6 1284300800056 1.6 158. 159. 5.200E-01 19.6 1284300800057 1.6 160. 161. 2.400E-01 28.9 1284300800058 1.6 162. 163. 1.800E-01 33.3 1284300800059 1.6 164. 165. 1.600E-01 35.4 1284300800060 1.6 166. 167. 2.000E-02 100.0 1284300800061 3.1 64. 65. 9.730E-02 44.7 1284300800062 3.1 66. 67. 3.890E-02 70.7 1284300800063 3.1 68. 69. 3.890E-02 70.7 1284300800064 3.1 70. 71. 9.730E-02 44.7 1284300800065 3.1 72. 73. 5.840E-02 57.7 1284300800066 3.1 74. 75. 4.480E-01 20.9 1284300800067 3.1 76. 77. 7.590E-01 16.0 1284300800068 3.1 78. 79. 1.670E+00 10.8 1284300800069 3.1 80. 81. 2.650E+00 8.6 1284300800070 3.1 82. 83. 4.610E+00 6.5 1284300800071 3.1 84. 85. 5.120E+00 6.2 1284300800072 3.1 86. 87. 5.610E+00 5.9 1284300800073 3.1 88. 89. 5.430E+00 6.0 1284300800074 3.1 90. 91. 5.650E+00 5.9 1284300800075 3.1 92. 93. 5.290E+00 6.1 1284300800076 3.1 94. 95. 3.830E+00 7.1 1284300800077 3.1 96. 97. 3.020E+00 8.0 1284300800078 3.1 98. 99. 1.970E+00 10.0 1284300800079 3.1 100. 101. 1.230E+00 12.6 1284300800080 3.1 102. 103. 7.790E-01 15.8 1284300800081 3.1 104. 105. 7.010E-01 16.7 1284300800082 3.1 106. 107. 3.310E-01 24.3 1284300800083 3.1 108. 109. 2.140E-01 30.2 1284300800084 3.1 110. 111. 2.340E-01 28.9 1284300800085 3.1 112. 113. 2.530E-01 27.7 1284300800086 3.1 114. 115. 1.360E-01 37.8 1284300800087 3.1 116. 117. 1.170E-01 40.8 1284300800088 3.1 118. 119. 1.750E-01 33.3 1284300800089 3.1 120. 121. 5.840E-02 57.7 1284300800090 3.1 122. 123. 7.790E-02 50.0 1284300800091 3.1 124. 125. 2.730E-01 26.7 1284300800092 3.1 126. 127. 6.230E-01 17.7 1284300800093 3.1 128. 129. 1.320E+00 12.1 1284300800094 3.1 130. 131. 1.620E+00 11.0 1284300800095 3.1 132. 133. 2.160E+00 9.5 1284300800096 3.1 134. 135. 3.430E+00 7.5 1284300800097 3.1 136. 137. 4.710E+00 6.4 1284300800098 3.1 138. 139. 4.930E+00 6.3 1284300800099 3.1 140. 141. 5.450E+00 6.0 1284300800100 3.1 142. 143. 5.550E+00 5.9 1284300800101 3.1 144. 145. 4.830E+00 6.4 1284300800102 3.1 146. 147. 4.050E+00 6.9 1284300800103 3.1 148. 149. 3.370E+00 7.6 1284300800104 3.1 150. 151. 2.670E+00 8.5 1284300800105 3.1 152. 153. 1.710E+00 10.7 1284300800106 3.1 154. 155. 1.030E+00 13.7 1284300800107 3.1 156. 157. 5.450E-01 18.9 1284300800108 3.1 158. 159. 4.480E-01 20.9 1284300800109 3.1 160. 161. 2.140E-01 30.2 1284300800110 3.1 162. 163. 1.560E-01 35.4 1284300800111 3.1 164. 165. 1.560E-01 35.4 1284300800112 3.1 166. 167. 7.790E-02 50.0 1284300800113 5.2 64. 65. 1.990E-02 100.0 1284300800114 5.2 66. 67. 1.990E-02 100.0 1284300800115 5.2 68. 69. 5.980E-02 57.7 1284300800116 5.2 70. 71. 7.970E-02 50.0 1284300800117 5.2 72. 73. 2.790E-01 26.7 1284300800118 5.2 74. 75. 5.380E-01 19.2 1284300800119 5.2 76. 77. 8.370E-01 15.4 1284300800120 5.2 78. 79. 1.850E+00 10.4 1284300800121 5.2 80. 81. 3.050E+00 8.1 1284300800122 5.2 82. 83. 4.200E+00 6.9 1284300800123 5.2 84. 85. 5.020E+00 6.3 1284300800124 5.2 86. 87. 5.840E+00 5.8 1284300800125 5.2 88. 89. 6.020E+00 5.8 1284300800126 5.2 90. 91. 5.140E+00 6.2 1284300800127 5.2 92. 93. 5.300E+00 6.1 1284300800128 5.2 94. 95. 4.400E+00 6.7 1284300800129 5.2 96. 97. 3.030E+00 8.1 1284300800130 5.2 98. 99. 1.410E+00 11.9 1284300800131 5.2 100. 101. 8.970E-01 14.9 1284300800132 5.2 102. 103. 3.990E-01 22.4 1284300800133 5.2 104. 105. 3.390E-01 24.3 1284300800134 5.2 106. 107. 3.590E-01 23.6 1284300800135 5.2 108. 109. 3.790E-01 22.9 1284300800136 5.2 110. 111. 2.590E-01 27.7 1284300800137 5.2 112. 113. 3.590E-01 23.6 1284300800138 5.2 114. 115. 2.190E-01 30.2 1284300800139 5.2 116. 117. 1.390E-01 37.8 1284300800140 5.2 118. 119. 1.590E-01 35.4 1284300800141 5.2 120. 121. 3.590E-01 23.6 1284300800142 5.2 122. 123. 9.960E-02 44.7 1284300800143 5.2 124. 125. 3.590E-01 23.6 1284300800144 5.2 126. 127. 6.580E-01 17.4 1284300800145 5.2 128. 129. 1.340E+00 12.2 1284300800146 5.2 130. 131. 1.850E+00 10.4 1284300800147 5.2 132. 133. 3.330E+00 7.7 1284300800148 5.2 134. 135. 4.440E+00 6.7 1284300800149 5.2 136. 137. 4.720E+00 6.5 1284300800150 5.2 138. 139. 6.020E+00 5.8 1284300800151 5.2 140. 141. 4.620E+00 6.6 1284300800152 5.2 142. 143. 5.480E+00 6.0 1284300800153 5.2 144. 145. 4.960E+00 6.3 1284300800154 5.2 146. 147. 3.650E+00 7.4 1284300800155 5.2 148. 149. 2.770E+00 8.5 1284300800156 5.2 150. 151. 1.570E+00 11.3 1284300800157 5.2 152. 153. 7.970E-01 15.8 1284300800158 5.2 154. 155. 7.170E-01 16.7 1284300800159 5.2 156. 157. 5.980E-01 18.3 1284300800160 5.2 158. 159. 2.390E-01 28.9 1284300800161 5.2 160. 161. 3.390E-01 24.3 1284300800162 5.2 162. 163. 1.790E-01 33.3 1284300800163 5.2 164. 165. 1.590E-01 35.4 1284300800164 5.2 166. 167. 1.200E-01 40.8 1284300800165 ENDDATA 158 0 1284300800166 ENDSUBENT 165 0 1284300899999 ENDENTRY 8 0 1284399999999