ENTRY 32888 20230412 3288800000001 SUBENT 32888001 20230412 20240316 3288800100001 BIB 13 46 3288800100002 TITLE The FFIS spectrometer for determination of fission 3288800100003 fragment mass distribution with the energy-velocity 3288800100004 method 3288800100005 AUTHOR (Chao Liu, Shilong Liu, Yi Yang, Kunling Zhao, 3288800100006 Yongjing Chen, Yang Su, Kai Zhang, Jing Feng) 3288800100007 REFERENCE (J,NIM/A,1041,167319,2022) 3288800100008 #doi:10.1016/j.nima.2022.167319 3288800100009 INSTITUTE (3CPRAEP) 3288800100010 (3CPRCPR) Chengdu University of Technology, Chengdu 3288800100011 FACILITY (REAC,3CPRAEP) In-hospital Neutron Irradiator (IHNI) 3288800100012 is a Miniature Neutron Source reactor (MNSR) of pool- 3288800100013 tank type. 3288800100014 INC-SOURCE (REAC) The measured thermal neutron (<0.5 eV) flux 3288800100015 density is 1.92E9 /cm2/s at the exit aperture of the 3288800100016 thermal neutron beam, and the diameter of the exit is 3288800100017 12 cm. The share of thermal neutrons is about 87%. 3288800100018 The contribution of epi-cadmium neutron induced 3288800100019 fission to the absolute fission yields has been 3288800100020 estimated to be about 0.25%. 3288800100021 DETECTOR (IOCH) The axial grid ionization chamber with a 3288800100022 silicon nitride entrance window of 100 nm thickness 3288800100023 was tested and calibrated with a 252Cf spontaneous 3288800100024 fission source. The intrinsic energy resolution for 3288800100025 1.27 MeV/u 63Cu particles is measured to be 450 keV 3288800100026 (FWHM). 3288800100027 (MCPLT) The time resolution was determined with two 3288800100028 microchannel plate (MCP) timing detectors to be 157ps 3288800100029 (FWHM) for 241Am radiation source, implying that the 3288800100030 intrinsic time resolution is about 110ps (FWHM) for a 3288800100031 single timing detector. 3288800100032 METHOD E-v method 3288800100033 (TOF) The flight path length is 100.45 cm. 3288800100034 SAMPLE (92-U-235,ENR=0.902) The UO2 target was electroplated 3288800100035 on to an aluminium backing and had a thickness of 3288800100036 about 500 ug/cm2. The effective diameter of this 3288800100037 target is 1.6 cm. The neutron beam is collimated by 3288800100038 the boron-doping polyethylene and cadmium into a 3288800100039 quasi-parallel beam with a diameter of 5 cm, and the 3288800100040 entire uranium target was enclosed by neutron beams. 3288800100041 CORRECTION The energy loss as a function of fragment mass given 3288800100042 through the Geant4 event-by-event computation method. 3288800100043 ERR-ANALYS (ERR-S) Statistical uncertainty. 3288800100044 STATUS (TABLE) Fig.12 of Nucl.Instr.Meth.A,1041,167319,2022. 3288800100045 The data were provided by author. 3288800100046 HISTORY (20230406R) The data obtained from Chao Liu 3288800100047 (20230410C) Su Yang (CNDC) 3288800100048 ENDBIB 46 0 3288800100049 COMMON 1 3 3288800100050 EN 3288800100051 EV 3288800100052 2.53E-02 3288800100053 ENDCOMMON 3 0 3288800100054 ENDSUBENT 53 0 3288800199999 SUBENT 32888002 20230412 20240316 3288800200001 BIB 2 3 3288800200002 REACTION (92-U-235(N,F)MASS,SEC,FY) 3288800200003 ANALYSIS The mass yield distribution with the sum of the 3288800200004 yields normalized to 200%. 3288800200005 ENDBIB 3 0 3288800200006 NOCOMMON 0 0 3288800200007 DATA 3 106 3288800200008 MASS DATA ERR-S 3288800200009 NO-DIM PC/FIS PC/FIS 3288800200010 66. 0.02181 0.00824 3288800200011 67. 0.02805 0.00935 3288800200012 68. 0.02805 0.00935 3288800200013 69. 0.02493 0.00881 3288800200014 70. 0.02181 0.00824 3288800200015 71. 0.02493 0.00881 3288800200016 72. 0.00935 0.0054 3288800200017 73. 0.0187 0.00763 3288800200018 74. 0.0187 0.00763 3288800200019 75. 0.01246 0.00623 3288800200020 76. 0.02181 0.00824 3288800200021 77. 0.02493 0.00881 3288800200022 78. 0.04051 0.01124 3288800200023 79. 0.02805 0.00935 3288800200024 80. 0.08414 0.01619 3288800200025 81. 0.17139 0.02311 3288800200026 82. 0.25865 0.02839 3288800200027 83. 0.41758 0.03607 3288800200028 84. 0.78529 0.04947 3288800200029 85. 1.07199 0.0578 3288800200030 86. 1.76067 0.07407 3288800200031 87. 2.34964 0.08557 3288800200032 88. 3.34372 0.10208 3288800200033 89. 4.50608 0.1185 3288800200034 90. 5.32876 0.12886 3288800200035 91. 5.57183 0.13177 3288800200036 92. 6.21066 0.13912 3288800200037 93. 6.48489 0.14216 3288800200038 94. 6.49112 0.14222 3288800200039 95. 6.53475 0.1427 3288800200040 96. 6.31349 0.14027 3288800200041 97. 6.28856 0.13999 3288800200042 98. 6.354 0.14071 3288800200043 99. 6.46931 0.14199 3288800200044 100. 5.98629 0.13658 3288800200045 101. 5.14179 0.12658 3288800200046 102. 3.96074 0.1111 3288800200047 103. 2.83577 0.09401 3288800200048 104. 1.83858 0.07569 3288800200049 105. 1.01589 0.05627 3288800200050 106. 0.56092 0.04181 3288800200051 107. 0.32097 0.03163 3288800200052 108. 0.1153 0.01896 3288800200053 109. 0.08102 0.01589 3288800200054 110. 0.07791 0.01558 3288800200055 111. 0.06856 0.01462 3288800200056 112. 0.04051 0.01124 3288800200057 113. 0.03116 0.00985 3288800200058 114. 0.03428 0.01034 3288800200059 115. 0.03739 0.01079 3288800200060 116. 0.04051 0.01124 3288800200061 117. 0.07167 0.01494 3288800200062 118. 0.0187 0.00763 3288800200063 119. 0.04051 0.01124 3288800200064 120. 0.05921 0.01358 3288800200065 121. 0.06544 0.01428 3288800200066 122. 0.07479 0.01527 3288800200067 123. 0.09349 0.01707 3288800200068 124. 0.12777 0.01995 3288800200069 125. 0.15893 0.02225 3288800200070 126. 0.3459 0.03283 3288800200071 127. 0.52976 0.04063 3288800200072 128. 0.90994 0.05325 3288800200073 129. 1.48333 0.06799 3288800200074 130. 2.49299 0.08814 3288800200075 131. 3.4933 0.10434 3288800200076 132. 4.64319 0.12029 3288800200077 133. 5.37862 0.12946 3288800200078 134. 6.49735 0.14229 3288800200079 135. 6.76223 0.14516 3288800200080 136. 6.16391 0.13859 3288800200081 137. 6.21066 0.13912 3288800200082 138. 6.55344 0.14291 3288800200083 139. 6.47242 0.14202 3288800200084 140. 6.3727 0.14092 3288800200085 141. 6.0268 0.13704 3288800200086 142. 5.93955 0.13605 3288800200087 143. 5.58118 0.13188 3288800200088 144. 4.4718 0.11805 3288800200089 145. 3.93892 0.11079 3288800200090 146. 2.92926 0.09554 3288800200091 147. 2.14709 0.0818 3288800200092 148. 1.46775 0.06763 3288800200093 149. 1.0564 0.05738 3288800200094 150. 0.66376 0.04548 3288800200095 151. 0.48613 0.03892 3288800200096 152. 0.31162 0.03116 3288800200097 153. 0.16204 0.02247 3288800200098 154. 0.12777 0.01995 3288800200099 155. 0.09349 0.01707 3288800200100 156. 0.04986 0.01246 3288800200101 157. 0.05609 0.01322 3288800200102 158. 0.02805 0.00935 3288800200103 159. 0.01246 0.00623 3288800200104 160. 0.02181 0.00824 3288800200105 161. 0.00623 0.00441 3288800200106 162. 0.01558 0.00697 3288800200107 163. 0.00312 0.00312 3288800200108 164. 0.00623 0.00441 3288800200109 165. 0.02181 0.00824 3288800200110 166. 0.00623 0.00441 3288800200111 167. 0.01558 0.00697 3288800200112 168. 0.00623 0.00441 3288800200113 169. 0.01246 0.00623 3288800200114 170. 0.00312 0.00312 3288800200115 171. 0.00312 0.00312 3288800200116 ENDDATA 108 0 3288800200117 ENDSUBENT 116 0 3288800299999 ENDENTRY 2 0 3288899999999