ENTRY 22091 20170718 22622209100000001 SUBENT 22091001 20170718 22622209100100001 BIB 12 47 2209100100002 TITLE Measurement of 235U fission cross section around 14 MeV2209100100003 AUTHOR (T.Iwasaki, Y.Karino, S.Matsuyama, F.Manabe, M.Baba, 2209100100004 K.Kanda, N.Hirakawa) 2209100100005 REFERENCE (C,88MITO,,87,1988) 2209100100006 INSTITUTE (2JPNTOH) 2209100100007 FACILITY (DYNAM,2JPNTOH) 2209100100008 INC-SOURCE (D-T) 2209100100009 DETECTOR (FISCH) Parallel plate ionization chamber (60 mm 2209100100010 inner diam., 17 mm between electrode and the sample) 2209100100011 (TELES,PROPC,CSICR) Proton recoil telescope consisted 2209100100012 of two gas proportional counters and CsI(Tl) 2209100100013 scintillator (1 mm thick, 3 cm diam.). 2209100100014 The radiator had a thickness of 28.04 mg/cm2. 2209100100015 The sensitivity of the telescope were experimentally 2209100100016 determined in a separate experiment using the 2209100100017 associated particle method. 2209100100018 (SCIN) NE213 scintillation detector with neutron- 2209100100019 gamma discrimination to observe parasitic neutrons, 2209100100020 though no such neutrons were found. 2209100100021 MONITOR (1-H-1(N,EL)1-H-1,,SIG) 2209100100022 SAMPLE Enriched (99.912%) 235U (25 mm diam., 94 ug/cm2 thick) 2209100100023 prepared by electro-deposition on a Ptplate. 2209100100024 Isotopic composition was determined by mass 2209100100025 spectrometry at ORNL. 2209100100026 (92-U-235,ENR=0.99912) 2209100100027 (92-U-234,ENR=0.000298) 2209100100028 (92-U-236,ENR=0.000165) 2209100100029 (92-U-238,ENR=0.000414) 2209100100030 CORRECTION Corrected for 2209100100031 - coincidence losses of recoil protons 2209100100032 - fission counts extrapolation to zero pulse height 2209100100033 - self-absorption of sample 2209100100034 - interaction of recoiled protons 2209100100035 - neutrons scattered by target material 2209100100036 - neutrons scattered by chamber material 2209100100037 - attenuation of source neutrons 2209100100038 ERR-ANALYS (ERR-T) Total uncertainty propagated from 2209100100039 (ERR-S,1.0,1.5) Fission counts including extrapolation 2209100100040 and background (1.0-1.5%)2209100100041 (ERR-1) Sample assay (1.0%)2209100100042 (ERR-2) n-p cross section and anisotropy (1.2%)2209100100043 HISTORY (19881201C) N.O. 2209100100044 (19881216E) 2209100100045 (19890919E) 2209100100046 (20070529A) Date is corrected 2209100100047 (20070529U) Last corrections have been done. 2209100100048 (20170718A) On. ERR-ANALYS updated. Major rev. in 002. 2209100100049 ENDBIB 47 0 2209100100050 COMMON 2 3 2209100100051 ERR-1 ERR-2 2209100100052 PER-CENT PER-CENT 2209100100053 1.0 1.2 2209100100054 ENDCOMMON 3 0 2209100100055 ENDSUBENT 54 0 2209100199999 SUBENT 22091002 20170718 22622209100200001 BIB 3 4 2209100200002 REACTION (92-U-235(N,F),,SIG) 2209100200003 STATUS (TABLE) Table 2 of C,88MITO,,87,1988 2209100200004 HISTORY (20070529U) DATA-ERR changed to ERR-T 2209100200005 (20170718A) On. %-uncertainty adopted for ERR-T. 2209100200006 ENDBIB 4 0 2209100200007 NOCOMMON 0 0 2209100200008 DATA 4 5 2209100200009 EN EN-RSL DATA ERR-T 2209100200010 MEV MEV B PER-CENT 2209100200011 13.51 0.15 1.995 2.5 2209100200012 13.97 0.04 2.040 2.6 2209100200013 14.10 0.05 2.057 2.8 2209100200014 14.49 0.17 2.119 2.7 2209100200015 14.90 0.29 2.114 2.7 2209100200016 ENDDATA 7 0 2209100200017 ENDSUBENT 16 0 2209100299999 ENDENTRY 2 0 2209199999999