ENTRY 20870 20190722 22812087000000001 SUBENT 20870001 20190722 22812087000100001 BIB 13 34 2087000100002 TITLE Measurements of 238U/235U fission cross section 2087000100003 ratios in the energy range 2-7 MeV 2087000100004 AUTHOR (M.Cance, G.Grenier) 2087000100005 INSTITUTE (2FR BRC) 2087000100006 REFERENCE (C,76ANL,,141,1976) Main reference. 2087000100007 REL-REF (I,20779001,M.Cance+,C,76ANL,,237,1976) 2087000100008 Sample descriptions 2087000100009 FACILITY (VDG,2FR BRC) 4 MeV Van de Graaff 2087000100010 INC-SOURCE (P-T) T-Ti (~500 ug/cm2 thick) on Au backing 2087000100011 (D-D) D2 gas (1 cm long 2 atm) with 2 um Havar window 2087000100012 SAMPLE (92-U-238,ENR=0.999823) 79.9 ug/cm2 thick 2087000100013 234U (0.00016%), 235U (0.01755%), 236U (<0.00001%) 2087000100014 (92-U-235,ENR=0.97663) 110.2 ug/cm2 thick 2087000100015 234U (1.6653%), 236U (0.1491%), 238U (0.5229%) 2087000100016 METHOD (TOF) Pulse width of 10 ns and repetition rate of 1 MHz2087000100017 DETECTOR (IOCH) Double 4pi ionization chamber 2087000100018 CORRECTION Corrections for 2087000100019 - time dependent background (0-9%), 2087000100020 - angular distribution of the neutron source 2087000100021 maximum 8% for the D-D reaction at En=4 MeV, 2087000100022 - fissions by scattered neutrons (0-0.4%), 2087000100023 - fissions by other isotopes, 2087000100024 - time independent background, 2087000100025 - detector efficiency 2087000100026 ERR-ANALYS (ERR-S) Statistical 2087000100027 (ERR-1) Angular distribution of neutron source 2087000100028 (ERR-2) Geometry (0.7%) 2087000100029 (ERR-3) Time independent background 2087000100030 (ERR-4) Total number of atoms (2.4%) 2087000100031 (ERR-5) Fissions in other isotopes (0.25%) 2087000100032 (ERR-T) Total uncertainty of results 2087000100033 HISTORY (19790411C) CN. 2087000100034 (20160926A) SD: Ref. corrected. ERR-ANALYS update. 2087000100035 (20190722A) On. ERR-ANALYS updated. Major rev. in 002. 2087000100036 ENDBIB 34 0 2087000100037 COMMON 3 3 2087000100038 ERR-2 ERR-4 ERR-5 2087000100039 PER-CENT PER-CENT PER-CENT 2087000100040 0.7 2.4 0.25 2087000100041 ENDCOMMON 3 0 2087000100042 ENDSUBENT 41 0 2087000199999 SUBENT 20870002 20190722 22812087000200001 BIB 3 3 2087000200002 REACTION ((92-U-238(N,F),,SIG)/(92-U-235(N,F),,SIG)) 2087000200003 STATUS (TABLE) Table 2 from C,76ANL,,141,1976 2087000200004 HISTORY (20190722A) On. EN-RSL->EN-RSL-HW. ERR-S,1,3 added. 2087000200005 ENDBIB 3 0 2087000200006 NOCOMMON 0 0 2087000200007 DATA 7 9 2087000200008 EN EN-RSL-HW DATA ERR-S ERR-1 ERR-3 2087000200009 ERR-T 2087000200010 MEV MEV NO-DIM PER-CENT PER-CENT PER-CENT 2087000200011 PER-CENT 2087000200012 2.65 0.05 0.410 0.72 2087000200013 2.6 2087000200014 3.15 0.05 0.416 0.86 2087000200015 2.6 2087000200016 3.60 0.14 0.443 1.08 0.2 2087000200017 2.7 2087000200018 4.30 0.09 0.482 1. 0.3 2087000200019 2.7 2087000200020 4.90 0.08 0.487 0.78 0.4 2087000200021 2.6 2087000200022 5.46 0.07 0.510 0.92 0.5 0.1 2087000200023 2.7 2087000200024 5.99 0.07 0.548 0.92 0.7 0.65 2087000200025 2.8 2087000200026 6.50 0.07 0.592 0.78 0.7 0.9 2087000200027 2.9 2087000200028 7.01 0.08 0.589 0.78 0.8 0.6 2087000200029 2.8 2087000200030 ENDDATA 22 0 2087000200031 ENDSUBENT 30 0 2087000299999 ENDENTRY 2 0 2087099999999