ENTRY 20354 20201117 22952035400000001 SUBENT 20354001 20201117 22952035400100001 BIB 12 27 2035400100002 TITLE A measurement of the fission cross section of 235U at 2035400100003 440 and 530 keV neutron energies 2035400100004 AUTHOR (F.Kaeppeler) 2035400100005 INSTITUTE (2GERKFK) 2035400100006 REFERENCE (R,KFK-1313,1970) 2035400100007 FACILITY (VDG,2GERKFK) 3MV puled VdG 2035400100008 INC-SOURCE (P-LI7) Normally 7Li (40-60 keV thick) on Ta backing 2035400100009 SAMPLE Uranium acetate (92 ug/cm2 thick, 40 mm diam.) 2035400100010 electrosprayed onto stainless steel (0.9 mm thick, 2035400100011 70 mm diam.), where uranium mass is 1.161 mg+/-0.8%. 2035400100012 (92-U-235,ENR=0.995) +/- 0.01% 2035400100013 METHOD (TOF) flight path (target-glass detector) of 3.02 m. 2035400100014 Pulse-width of 1 ns, repetion rate of 1.0E+06/sec, 2035400100015 and time resolution of less than 2 ns/m. 2035400100016 DETECTOR (SCIN) Gas scintillator detector (85% Ar+15% N) for 2035400100017 fission fragment detection 2035400100018 (SIBAR) for detection of recoil protons from glycerol 2035400100019 tristearate radiator evaporated onto stainless 2035400100020 steel (0.9 mm thick) 2035400100021 REL-REF (M,,F.Kaeppeler+,C,70HELSINKI,1,221,1970) 2035400100022 Details of neutron flux determination 2035400100023 CORRECTION Corrected for 2035400100024 - neutron scattering 2035400100025 - absorption of fission fragment (0.994+/-0.3%) 2035400100026 HISTORY (19710812C) 2035400100027 (19740929E) 2035400100028 (20201117A) On. Recompiled. 2035400100029 ENDBIB 27 0 2035400100030 NOCOMMON 0 0 2035400100031 ENDSUBENT 30 0 2035400199999 SUBENT 20354002 20201117 22952035400200001 BIB 5 13 2035400200002 REACTION (92-U-235(N,F),,SIG) 2035400200003 MONITOR (1-H-1(N,EL)1-H-1,,SIG) 2035400200004 ERR-ANALYS (ERR-T) total uncertainty incuding the statistical 2035400200005 uncertainty and 2035400200006 (ERR-1) number of H atoms (0.5%) 2035400200007 (ERR-2) number of U atoms (0.8%) 2035400200008 (ERR-3) efficiency of proton recoil detector (1.5%) 2035400200009 (ERR-4) efficiency of fission chamber (0.5%) 2035400200010 (ERR-5) absorption in fission layer (0.3%) 2035400200011 (ERR-6) isotopic composition of 235U (0.01%) 2035400200012 (ERR-7) (n,g) background (0.5%) 2035400200013 STATUS (TABLE) Text (p.5) of KFK-1313 2035400200014 HISTORY (20201117A) On. Partial uncertainties added. 2035400200015 ENDBIB 13 0 2035400200016 COMMON 7 6 2035400200017 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 2035400200018 ERR-7 2035400200019 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2035400200020 PER-CENT 2035400200021 0.5 0.8 1.5 0.5 0.3 0.01 2035400200022 0.5 2035400200023 ENDCOMMON 6 0 2035400200024 DATA 4 2 2035400200025 EN EN-RSL-HW DATA ERR-T 2035400200026 KEV KEV B PER-CENT 2035400200027 440. 25. 1.17 3.5 2035400200028 530. 30. 1.17 3.5 2035400200029 ENDDATA 4 0 2035400200030 ENDSUBENT 29 0 2035400299999 ENDENTRY 2 0 2035499999999