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