ENTRY 14529 20210311 14781452900000001 SUBENT 14529001 20210311 14781452900100001 BIB 14 38 1452900100002 TITLE A measurement of the prompt fission neutron energy 1452900100003 spectrum for 235U(n,f) and the neutron-induced 1452900100004 fission cross section for 238U(n,f) 1452900100005 AUTHOR (Z.W.Miller) 1452900100006 INSTITUTE (1USAKTY) 1452900100007 REFERENCE (T,MILLER,2015) 1452900100008 Ph.D thesis submitted to University of Kentucky 1452900100009 https://uknowledge.uky.edu/physastron-etds/29/ 1452900100010 FACILITY (LINAC,1USALAS) Weapons Neutron Research facility (WNR)1452900100011 of Los Alamos Neutron Science Center (LANSCE) 1452900100012 INC-SOURCE (SPALL) 800 MeV protons on W target 1452900100013 SAMPLE Ionization chamber housed 3 deposits of target 1452900100014 material. 1452900100015 Each foil is 0.0013 inch steel plate and each 238U 1452900100016 deposit was approx. 55 mg. 1452900100017 The active site for each foil is a circle with 1452900100018 diameter of 13.3 cm. 1452900100019 DETECTOR (IOCH) Parallel plate ionization chamber. 1452900100020 The chamber was filled with P10 gas, which is 90% Ar 1452900100021 and 10% methane at a pressure of 68 kPa. 1452900100022 Time resolution of detector was of the order of 1 ns. 1452900100023 (TELES,CSICR,SCIN) 1452900100024 Placed at 16, 24, 30, 36, 42 and 48 deg relative to 1452900100025 beam direction for charged particle detection. 1452900100026 METHOD (TOF) Measurement was performed on target 4 flight 1452900100027 path 15R. 1452900100028 The proton beam was pulsed and divided into 625 us 1452900100029 long macropulses, which were subsequently subdivided 1452900100030 into 1.8 us micropulses, micropulse width was 0.2 ns. 1452900100031 ANALYSIS Normalized to 238U(n,f) cross section of the ENDF/B-VII1452900100032 standards sub-library submitted by A.D. Carlson, 2007 1452900100033 MONITOR (1-H-1(N,EL)1-H-1,,DA) 1452900100034 ((MONIT)92-U-238(N,F),,SIG) 1452900100035 MONIT-REF (,A.D.Carlson+,3,ENDF/B-VII,,2007) 1452900100036 CORRECTION Corrected for dead time 1452900100037 HISTORY (20190205C) Compiled by S.H. 1452900100038 (20210311A) On. Important alterations in 002. Some BIB 1452900100039 keywords moved from 002 to 001. 1452900100040 ENDBIB 38 0 1452900100041 NOCOMMON 0 0 1452900100042 ENDSUBENT 41 0 1452900199999 SUBENT 14529002 20210311 14781452900200001 BIB 4 12 1452900200002 REACTION (92-U-238(N,F),,SIG) 1452900200003 ERR-ANALYS (ERR-SYS) Total systematic uncertainty including 1452900200004 - uncertainty in reference cross section 1452900200005 - yield summation uncertainty 1452900200006 - data acquisition dead time 1452900200007 all added in quadrature 1452900200008 (DATA-ERR) Total uncertainty obtained by adding 1452900200009 systematic uncertainty and statistical uncertainty 1452900200010 but excluding the error from the normalization point 1452900200011 (MONIT-ERR) Error from the normalization point 1452900200012 STATUS (TABLE) Data taken from tab.4.6 of the reference 1452900200013 HISTORY (20210311A) On. ERR-T -> DATA-ERR. ERR-ANALYS updated. 1452900200014 ENDBIB 12 0 1452900200015 COMMON 5 3 1452900200016 EN-RSL EN-NRM MONIT MONIT-ERR ERR-SYS 1452900200017 PER-CENT MEV B B PER-CENT 1452900200018 2.5 130. 1.33 0.0548 3.6 1452900200019 ENDCOMMON 3 0 1452900200020 DATA 3 18 1452900200021 EN DATA DATA-ERR 1452900200022 MEV B B 1452900200023 130. 1.3300 0.0666 1452900200024 140. 1.3251 0.0669 1452900200025 150. 1.3369 0.0680 1452900200026 160. 1.2548 0.0639 1452900200027 170. 1.3191 0.0680 1452900200028 180. 1.2399 0.0642 1452900200029 190. 1.2348 0.0644 1452900200030 200. 1.2833 0.0675 1452900200031 210. 1.2337 0.0652 1452900200032 220. 1.2279 0.0658 1452900200033 230. 1.2008 0.0643 1452900200034 240. 1.1883 0.0642 1452900200035 250. 1.2317 0.0669 1452900200036 260. 1.2343 0.0676 1452900200037 270. 1.2364 0.0680 1452900200038 280. 1.2054 0.0666 1452900200039 290. 1.1432 0.0634 1452900200040 300. 1.2075 0.0675 1452900200041 ENDDATA 20 0 1452900200042 ENDSUBENT 41 0 1452900299999 ENDENTRY 2 0 1452999999999