ENTRY 21909 20201223 22962190900000001 SUBENT 21909001 20201223 22962190900100001 BIB 15 54 2190900100002 TITLE Neutron emission, mass distribution and energetics in 2190900100003 14.5 MeV-neutron induced fission of uranium-238 2190900100004 AUTHOR (H.Yamamoto,Y.Mori,Y.Wakuta,A.Katase,M.Sonoda) 2190900100005 REFERENCE (J,NST,16,779,1979) 2190900100006 (J,NST,13,678,1976) - first publ., prim.results 2190900100007 REL-REF (M,,H.Yamamoto+,J,NIM,134,119,1976) - The experimental 2190900100008 arrangement and method 2190900100009 INSTITUTE (2JPNKYU) 2190900100010 FACILITY (CCW,2JPNKYU) 2190900100011 INC-SOURCE (D-T) 2190900100012 INC-SPECT The energy of neutron was spread at the target from 2190900100013 14.0 to 14.9 MeV due to a rather large solid angle 2190900100014 subtended by it at the neutron source. The mean 2190900100015 effective neutron energy was estimated to be 14.5 MeV 2190900100016 SAMPLE The uranium target was made in a circular form with 2190900100017 a diameter of 3 cm by electro-spraying a solution of 2190900100018 uranylacetate onto an about 90 ug/cm2 thick nickel 2190900100019 backing. The uranium thickness was determined to be 2190900100020 about 250 ug/cm2 by alpha-particle counting. 2190900100021 METHOD The U-target was placed between two detectors with the2190900100022 center of the detectors, the U-target and the N-source2190900100023 placed in a straight line at an angle of 60 degr. with2190900100024 respect to the deuteron beam. Neutrons bombarded the 2190900100025 target through the near detector. The distance between2190900100026 the neutron source and the target was 1.8 cm. 2190900100027 Energies of both fragments and the flight time of one 2190900100028 fragment were measured event by event. About 10000 2190900100029 events in total were obtained. 2190900100030 DETECTOR (SIBAR) One of the fragment detectors was a silicon 2190900100031 surface-barrier detector placed at a distance of 2190900100032 0.3 cm from the target. The complementary fragment was2190900100033 detected by a large area detector located at the end 2190900100034 of a 101.8 cm evacuated flight tube. This detector was2190900100035 composed of nine identical silicon surface-barrier 2190900100036 detectors arrayed in a mosaic structure and had a 2190900100037 sensitive area of 82 cm2. 2190900100038 ANALYSIS The pre-neutron-emission mass was derived from the 2190900100039 post-neutron-emission masses and energies of both 2190900100040 fragments based on momentum conservation and isotropic 2190900100041 neutron emission assumption. 2190900100042 PART-DET (FF) Fission fragments. 2190900100043 CORRECTION For 2190900100044 - the effect of the center-of-mass recoil of the 2190900100045 fissioning nucleus due to the impinging neutron 2190900100046 momentum. 2190900100047 - The effect of energy loss for fragments in the 2190900100048 target. 2190900100049 The nu-bar data was corrected to include second- 2190900100050 chance fission. 2190900100051 HISTORY (19840507C) A.L. 2190900100052 (20090401A) Date is corrected' BIB information updated.2190900100053 Upper case to low case converted 2190900100054 (20201223A) SD: BIB updated. Subents 004-008 added. 2190900100055 Corrections in all Subents. 2190900100056 ENDBIB 54 0 2190900100057 NOCOMMON 0 0 2190900100058 ENDSUBENT 57 0 2190900199999 SUBENT 21909002 20201223 22962190900200001 BIB 4 7 2190900200002 REACTION (92-U-238(N,F),PRE,AKE,LF+HF) 2190900200003 STATUS (TABLE) Text on p.782 of 2190900200004 J.Nucl.Sci.Technol.,16(1979)779 2190900200005 ERR-ANALYS (DATA-ERR) No details given. 2190900200006 HISTORY (20090401U) ERR-ANALYS keyword moved from SAN 001. 2190900200007 FF changed to LF+HF 2190900200008 (20201223U) SD: STATUS updated. 2190900200009 ENDBIB 7 0 2190900200010 NOCOMMON 0 0 2190900200011 DATA 5 1 2190900200012 EN -EN-RSL +EN-RSL DATA DATA-ERR 2190900200013 MEV MEV MEV MEV MEV 2190900200014 14.5 0.5 0.4 169.4 2. 2190900200015 ENDDATA 3 0 2190900200016 ENDSUBENT 15 0 2190900299999 SUBENT 21909003 20201223 22962190900300001 BIB 5 12 2190900300002 REACTION (92-U-238(N,F),PR,NU,,,DERIV) 2190900300003 ANALYSIS Mean of nu(m*) weighted by the primary fission yield 2190900300004 Y(m*) plus the multiplicity of the neutrons evaporated 2190900300005 from the compound reported by Howerton (0.76). 2190900300006 REL-REF (R,,R.J.Howerton,J,NSE,46,42,1971) Multiplicity of the 2190900300007 neutrons evaporated from the compound given 2190900300008 STATUS (TABLE) Text on p.784 of 2190900300009 J.Nucl.Sci.Technol.,16(1979)779 2190900300010 HISTORY (20090701A) SF5 = PR added. STATUS keywd deleted 2190900300011 (20201223A) SD: SF9=DERIV added to REACTION code (not 2190900300012 from neutron detection). STATUS updated. ANALYSIS and 2190900300013 REL-REF added. 2190900300014 ENDBIB 12 0 2190900300015 NOCOMMON 0 0 2190900300016 DATA 4 1 2190900300017 EN -EN-RSL +EN-RSL DATA 2190900300018 MEV MEV MEV PRT/FIS 2190900300019 14.5 0.5 0.4 4.64 2190900300020 ENDDATA 3 0 2190900300021 ENDSUBENT 20 0 2190900399999 SUBENT 21909004 20201223 22962190900400001 BIB 6 9 2190900400002 REACTION (92-U-238(N,F)MASS,PRE,FY) 2190900400003 ANALYSIS Derived from the secondary yield by using Schmitt's 2190900400004 method. 2190900400005 REL-REF (M,,H.W.Schmitt+,J,PR,137,B837,1965) Method for 2190900400006 derivation of the primary fragment distribution 2190900400007 ERR-ANALYS (DATA-ERR) Errors not specified 2190900400008 STATUS (CURVE) Fig. 1 from J.Nucl.Sci.Technol.,16(1979)779 2190900400009 (DEP,21909005) Seconday fragment distribution 2190900400010 HISTORY (20201223C) SD 2190900400011 ENDBIB 9 0 2190900400012 COMMON 5 3 2190900400013 EN -EN-RSL +EN-RSL MASS-ERR-D ERR-DIG 2190900400014 MEV MEV MEV NO-DIM PER-CENT 2190900400015 14.5 0.5 0.4 0.05 0.3 2190900400016 ENDCOMMON 3 0 2190900400017 DATA 3 79 2190900400018 MASS DATA DATA-ERR 2190900400019 NO-DIM PC/FIS PC/FIS 2190900400020 80. 0.117 2190900400021 81. 0.224 2190900400022 82. 0.293 0.077 2190900400023 83. 0.377 2190900400024 84. 0.540 2190900400025 85. 0.499 2190900400026 86. 0.941 2190900400027 87. 1.262 2190900400028 88. 1.671 2190900400029 89. 2.027 2190900400030 90. 2.132 0.194 2190900400031 91. 2.686 2190900400032 92. 3.259 2190900400033 93. 3.647 2190900400034 94. 4.006 2190900400035 95. 4.239 2190900400036 96. 4.541 2190900400037 97. 5.309 2190900400038 98. 4.929 0.326 2190900400039 99. 5.281 2190900400040 100. 5.765 2190900400041 101. 5.254 2190900400042 102. 5.002 2190900400043 103. 4.530 2190900400044 104. 4.675 2190900400045 105. 4.535 2190900400046 106. 3.884 2190900400047 107. 3.346 2190900400048 108. 2.423 2190900400049 109. 2.485 2190900400050 110. 2.115 0.193 2190900400051 111. 1.800 2190900400052 112. 1.217 2190900400053 113. 1.256 2190900400054 114. 0.915 2190900400055 115. 0.679 2190900400056 116. 0.663 2190900400057 117. 0.940 2190900400058 118. 0.958 2190900400059 119. 1.072 2190900400060 120. 0.959 2190900400061 121. 0.698 2190900400062 122. 0.767 0.135 2190900400063 123. 0.772 2190900400064 124. 0.782 2190900400065 125. 0.979 2190900400066 126. 0.887 2190900400067 127. 1.442 2190900400068 128. 1.933 0.194 2190900400069 129. 1.983 2190900400070 130. 2.421 2190900400071 131. 2.993 2190900400072 132. 3.455 2190900400073 133. 4.114 2190900400074 134. 4.221 2190900400075 135. 4.523 2190900400076 136. 4.610 2190900400077 137. 5.224 2190900400078 137. 5.631 2190900400079 139. 5.394 2190900400080 140. 4.886 0.352 2190900400081 141. 4.798 2190900400082 142. 4.952 2190900400083 143. 4.598 2190900400084 144. 4.806 2190900400085 145. 4.325 2190900400086 146. 4.221 2190900400087 147. 3.439 2190900400088 148. 2.569 2190900400089 149. 2.080 2190900400090 150. 1.919 0.175 2190900400091 151. 1.153 2190900400092 152. 0.835 2190900400093 153. 1.038 2190900400094 154. 0.582 2190900400095 155. 0.544 2190900400096 156. 0.366 0.083 2190900400097 157. 0.283 2190900400098 158. 0.130 2190900400099 ENDDATA 81 0 2190900400100 ENDSUBENT 99 0 2190900499999 SUBENT 21909005 20201223 22962190900500001 BIB 4 4 2190900500002 REACTION (92-U-238(N,F)MASS,SEC,FY) 2190900500003 ERR-ANALYS (DATA-ERR) Errors not specified 2190900500004 STATUS (CURVE) Fig. 2 from J.Nucl.Sci.Technol.,16(1979)779 2190900500005 HISTORY (20201223C) SD 2190900500006 ENDBIB 4 0 2190900500007 COMMON 5 3 2190900500008 EN -EN-RSL +EN-RSL MASS-ERR-D ERR-DIG 2190900500009 MEV MEV MEV NO-DIM PER-CENT 2190900500010 14.5 0.5 0.4 0.05 0.04 2190900500011 ENDCOMMON 3 0 2190900500012 DATA 3 77 2190900500013 MASS DATA DATA-ERR 2190900500014 NO-DIM PRT/FIS PRT/FIS 2190900500015 81. 0.254 2190900500016 82. 0.479 0.096 2190900500017 83. 0.758 2190900500018 84. 1.080 2190900500019 85. 1.186 2190900500020 86. 1.558 2190900500021 87. 2.047 0.186 2190900500022 88. 2.220 2190900500023 89. 2.642 2190900500024 90. 3.067 2190900500025 91. 3.452 2190900500026 92. 3.837 2190900500027 93. 4.059 2190900500028 94. 4.215 2190900500029 95. 4.686 2190900500030 96. 4.488 2190900500031 97. 4.748 2190900500032 98. 5.411 0.388 2190900500033 99. 4.842 2190900500034 100. 5.517 2190900500035 101. 4.498 2190900500036 102. 4.729 2190900500037 103. 4.790 2190900500038 104. 3.979 2190900500039 105. 3.367 2190900500040 106. 3.108 2190900500041 107. 2.534 0.196 2190900500042 108. 2.119 2190900500043 109. 1.555 2190900500044 110. 1.079 2190900500045 111. 1.156 2190900500046 112. 1.028 2190900500047 113. 0.908 2190900500048 114. 0.818 2190900500049 115. 1.068 2190900500050 116. 0.932 2190900500051 117. 0.829 2190900500052 118. 0.824 0.120 2190900500053 119. 0.905 2190900500054 120. 0.988 2190900500055 121. 0.694 2190900500056 122. 1.126 2190900500057 123. 0.912 2190900500058 124. 1.106 2190900500059 125. 1.375 2190900500060 126. 1.269 2190900500061 127. 1.667 2190900500062 128. 1.984 2190900500063 129. 2.391 0.212 2190900500064 130. 2.935 2190900500065 131. 3.344 2190900500066 132. 4.208 2190900500067 133. 4.133 2190900500068 134. 5.364 2190900500069 135. 6.463 2190900500070 136. 5.607 2190900500071 137. 4.629 2190900500072 138. 4.866 2190900500073 139. 5.116 0.293 2190900500074 140. 3.848 2190900500075 141. 4.468 2190900500076 142. 4.280 2190900500077 143. 3.490 2190900500078 144. 3.406 2190900500079 145. 3.365 2190900500080 146. 2.595 2190900500081 147. 1.940 0.216 2190900500082 148. 1.736 2190900500083 149. 1.322 2190900500084 150. 1.026 2190900500085 151. 0.806 2190900500086 152. 0.726 2190900500087 153. 0.645 2190900500088 154. 0.454 0.079 2190900500089 155. 0.294 2190900500090 156. 0.319 2190900500091 157. 0.181 2190900500092 ENDDATA 79 0 2190900500093 ENDSUBENT 92 0 2190900599999 SUBENT 21909006 20201223 22962190900600001 BIB 4 4 2190900600002 REACTION (92-U-238(N,F)MASS,PRE,KE,LF+HF) 2190900600003 ERR-ANALYS (DATA-ERR) Errors not specified 2190900600004 STATUS (CURVE) Fig. 3 from J.Nucl.Sci.Technol.,16(1979)779 2190900600005 HISTORY (20201223C) SD 2190900600006 ENDBIB 4 0 2190900600007 COMMON 5 3 2190900600008 EN -EN-RSL +EN-RSL MASS-ERR-D ERR-DIG 2190900600009 MEV MEV MEV NO-DIM MEV 2190900600010 14.5 0.5 0.4 0.07 0.04 2190900600011 ENDCOMMON 3 0 2190900600012 DATA 3 34 2190900600013 MASS DATA DATA-ERR 2190900600014 NO-DIM MEV MEV 2190900600015 87. 161.10 2190900600016 89. 161.62 1.47 2190900600017 91. 165.54 2190900600018 93. 165.39 2190900600019 95. 167.54 2190900600020 97. 170.80 2190900600021 99. 171.26 1.27 2190900600022 101. 175.13 2190900600023 103. 174.27 2190900600024 105. 176.77 1.52 2190900600025 107. 177.59 2190900600026 109. 172.46 2190900600027 111. 172.12 1.98 2190900600028 113. 166.58 2190900600029 115. 165.77 2190900600030 117. 164.10 2190900600031 119. 162.74 3.51 2190900600032 121. 163.86 2190900600033 123. 165.90 2190900600034 125. 162.66 2190900600035 127. 168.05 2.03 2190900600036 129. 169.38 2190900600037 131. 176.61 2190900600038 133. 177.07 1.52 2190900600039 135. 176.57 2190900600040 137. 174.39 2190900600041 139. 172.26 1.22 2190900600042 141. 170.14 2190900600043 143. 168.47 2190900600044 145. 168.62 2190900600045 147. 166.80 2190900600046 149. 162.69 2190900600047 151. 160.61 2190900600048 153. 158.74 2190900600049 ENDDATA 36 0 2190900600050 ENDSUBENT 49 0 2190900699999 SUBENT 21909007 20201223 22962190900700001 BIB 4 4 2190900700002 REACTION (92-U-238(N,F)MASS,PRE/PR/FRG,NU) 2190900700003 ERR-ANALYS (DATA-ERR) Errors not specified 2190900700004 STATUS (CURVE) Fig. 5 from J.Nucl.Sci.Technol.,16(1979)779 2190900700005 HISTORY (20201223C) SD 2190900700006 ENDBIB 4 0 2190900700007 COMMON 5 3 2190900700008 EN -EN-RSL +EN-RSL MASS-ERR-D ERR-DIG 2190900700009 MEV MEV MEV NO-DIM PRT/FIS 2190900700010 14.5 0.5 0.4 0.06 0.004 2190900700011 ENDCOMMON 3 0 2190900700012 DATA 3 73 2190900700013 MASS DATA DATA-ERR 2190900700014 NO-DIM PRT/FIS PRT/FIS 2190900700015 84. 0.378 2190900700016 84. 0.737 2190900700017 85. 1.075 2190900700018 86. 0.759 2190900700019 87. 1.005 2190900700020 88. 0.668 2190900700021 89. 1.107 0.247 2190900700022 90. 1.021 2190900700023 91. 1.423 2190900700024 92. 0.957 2190900700025 93. 1.450 2190900700026 94. 1.659 2190900700027 95. 1.584 2190900700028 96. 1.820 2190900700029 97. 1.654 2190900700030 98. 1.793 2190900700031 99. 1.675 2190900700032 100. 1.755 0.177 2190900700033 101. 2.071 2190900700034 102. 2.120 2190900700035 103. 1.954 2190900700036 104. 1.728 2190900700037 105. 2.023 2190900700038 106. 2.302 2190900700039 107. 2.527 2190900700040 108. 2.489 2190900700041 109. 3.009 2190900700042 110. 2.570 0.289 2190900700043 111. 3.063 2190900700044 112. 3.636 2190900700045 113. 2.961 2190900700046 114. 2.843 2190900700047 115. 3.213 2190900700048 116. 3.245 2190900700049 117. 2.092 2190900700050 118. 2.172 2190900700051 119. 1.631 2190900700052 120. 2.548 0.456 2190900700053 121. 2.526 2190900700054 122. 2.848 2190900700055 123. 2.354 2190900700056 124. 1.963 2190900700057 125. 1.765 2190900700058 126. 1.513 2190900700059 127. 1.716 2190900700060 128. 1.448 2190900700061 129. 1.368 0.252 2190900700062 130. 1.169 2190900700063 131. 1.228 2190900700064 132. 1.507 2190900700065 133. 1.351 2190900700066 134. 1.657 2190900700067 135. 1.796 2190900700068 136. 1.518 2190900700069 137. 1.759 2190900700070 138. 1.919 2190900700071 139. 1.716 2190900700072 140. 2.021 0.188 2190900700073 141. 2.273 2190900700074 142. 2.123 2190900700075 143. 2.219 2190900700076 144. 2.471 2190900700077 145. 2.611 2190900700078 146. 2.863 0.236 2190900700079 147. 2.455 2190900700080 148. 2.793 2190900700081 149. 2.873 2190900700082 150. 3.157 2190900700083 151. 3.302 2190900700084 152. 3.586 2190900700085 153. 3.929 2190900700086 154. 3.554 2190900700087 155. 3.597 2190900700088 ENDDATA 75 0 2190900700089 ENDSUBENT 88 0 2190900799999 SUBENT 21909008 20201223 22962190900800001 BIB 4 5 2190900800002 REACTION (92-U-238(N,F)MASS,PRE/PR,NU) 2190900800003 ERR-ANALYS (DATA-ERR) Errors not specified 2190900800004 STATUS (CURVE) Fig. 5 from J.Nucl.Sci.Technol.,16(1979)779 2190900800005 (DEP,21909004) 2190900800006 HISTORY (20201223C) SD 2190900800007 ENDBIB 5 0 2190900800008 COMMON 5 3 2190900800009 EN -EN-RSL +EN-RSL MASS-ERR-D ERR-DIG 2190900800010 MEV MEV MEV NO-DIM PRT/FIS 2190900800011 14.5 0.5 0.4 0.06 0.004 2190900800012 ENDCOMMON 3 0 2190900800013 DATA 3 35 2190900800014 MASS DATA DATA-ERR 2190900800015 NO-DIM PRT/FIS PRT/FIS 2190900800016 121. 4.595 2190900800017 122. 6.054 2190900800018 123. 5.539 0.558 2190900800019 124. 4.799 2190900800020 125. 4.708 2190900800021 126. 5.158 2190900800022 127. 4.515 2190900800023 128. 4.000 2190900800024 129. 4.391 0.348 2190900800025 130. 3.662 2190900800026 131. 3.759 2190900800027 132. 3.818 2190900800028 133. 3.367 2190900800029 134. 3.399 2190900800030 135. 3.737 2190900800031 136. 3.662 2190900800032 137. 3.817 2190900800033 138. 3.678 2190900800034 139. 3.367 2190900800035 140. 3.817 0.252 2190900800036 141. 3.914 2190900800037 142. 3.962 2190900800038 143. 3.812 2190900800039 144. 4.139 2190900800040 145. 4.064 2190900800041 146. 3.812 2190900800042 147. 3.876 2190900800043 148. 3.908 0.332 2190900800044 149. 3.961 2190900800045 150. 3.811 2190900800046 151. 4.321 2190900800047 152. 4.337 2190900800048 153. 5.012 2190900800049 154. 4.277 2190900800050 155. 3.966 2190900800051 ENDDATA 37 0 2190900800052 ENDSUBENT 51 0 2190900899999 ENDENTRY 8 0 2190999999999