ENTRY 20618 20180724 22752061800000001 SUBENT 20618001 20180724 22752061800100001 BIB 14 37 2061800100002 TITLE Measurement of the neutron induced fission cross 2061800100003 sections of uranium 235 and plutonium 239 in the MeV 2061800100004 energy range 2061800100005 AUTHOR (I.Szabo, J.P.Marquette) 2061800100006 INSTITUTE (2FR CAD) 2061800100007 REFERENCE (C,76ANL,,208,1976) 2061800100008 REL-REF (O,20567001,I.Szabo+,C,70ANL,,257,1970) 2061800100009 (O,20569001,I.Szabo+,C,71KNOX,2,573,1971) 2061800100010 (O,20570001,I.Szabo+,C,73KIEV,3,27,1973) 2061800100011 (I,,I.Szabo+,C,70HELSINKI,1,229,1970) 2061800100012 Description on the fission chambers 2061800100013 (I,,J.L.Leroy+,C,70HELSINKI,1,243,1970) 2061800100014 Description on the directional counter 2061800100015 FACILITY (VDG,2FR CAD) 5-MeV Van de Graaff 2061800100016 INC-SOURCE (P-T) below 3.8 MeV 2061800100017 (D-D) above 3.9 MeV 2061800100018 DETECTOR (FISCH) Two fission chambers for fission measurement 2061800100019 (BF3) Two directional counters for flux measurement 2061800100020 METHOD Simultaneous measure of fission events in thin 2061800100021 walled ionization chambers and neutron flux with 2061800100022 a calibrated directional counter. 2061800100023 (TOF) To discreminate scattered neutrons and parasite 2061800100024 neutrons 2061800100025 ANALYSIS Separation of isotopic contributions made. No further 2061800100026 details given. 2061800100027 CORRECTION Corrected for 2061800100028 - Spurious neutrons of 12C(d,n)13N reaction 2061800100029 - Background 2061800100030 - Air atenuation and elastic scattering of neutrons 2061800100031 in wall chambers 2061800100032 ERR-ANALYS (ERR-1) Statistical errors, efficiency and position 2061800100033 incertitudes in detectors accounted 2061800100034 (ERR-2) Neutron flux determination 2061800100035 STATUS (TABLE) Table II in C,76ANL,,208,1976 2061800100036 HISTORY (19760622C) 2061800100037 (19761217E) 2061800100038 (20180724A) On. Major revision in 002-003. 2061800100039 ENDBIB 37 0 2061800100040 NOCOMMON 0 0 2061800100041 ENDSUBENT 40 0 2061800199999 SUBENT 20618002 20180724 22752061800200001 BIB 4 9 2061800200002 REACTION (92-U-235(N,F),,SIG) 2061800200003 MONITOR Absolute measurement 2061800200004 SAMPLE 0.5 mg/cm2 thick U3O8 on Pt (0.13 mm thick) backing 2061800200005 (92-U-235,ENR=0.93013) 2061800200006 (92-U-234,ENR=0.01196) 2061800200007 (92-U-236,ENR=0.00179) 2061800200008 (92-U-238,ENR=0.05612) 2061800200009 HISTORY (20180724A) On. EN-ERR -> EN-RSL-HW, DATA-ERR-> ERR-1, 2061800200010 ERR-2 added. 2061800200011 ENDBIB 9 0 2061800200012 NOCOMMON 0 0 2061800200013 DATA 5 13 2061800200014 EN EN-RSL-HW DATA ERR-1 ERR-2 2061800200015 MEV MEV B B PER-CENT 2061800200016 2.350 0.032 1.256 0.040 2.5 2061800200017 2.590 0.031 1.219 0.040 3.0 2061800200018 2.780 0.030 1.206 0.040 3.0 2061800200019 2.850 0.030 1.203 0.036 3.0 2061800200020 3.090 0.029 1.167 0.035 3.0 2061800200021 3.230 0.028 1.156 0.034 3.0 2061800200022 3.360 0.020 1.130 0.033 3.0 2061800200023 3.550 0.025 1.137 0.035 3.0 2061800200024 3.800 0.024 1.100 0.035 3.0 2061800200025 3.920 0.101 1.088 0.038 3.0 2061800200026 4.470 0.083 1.100 0.040 3.0 2061800200027 5.015 0.037 1.000 0.036 3.0 2061800200028 5.530 0.024 1.030 0.036 3.0 2061800200029 ENDDATA 15 0 2061800200030 ENDSUBENT 29 0 2061800299999 SUBENT 20618003 20180724 22752061800300001 BIB 5 10 2061800300002 REACTION (94-PU-239(N,F),,SIG) 2061800300003 SAMPLE 0.17 mg/cm2 thick 2061800300004 238Pu, 242Pu: < 0.01% for each. 2061800300005 (94-PU-239,ENR=0.9927) 2061800300006 (94-PU-240,ENR=0.0071) 2061800300007 (94-PU-241,ENR=0.0002) 2061800300008 ANALYSIS Normalized to the 1973 data set at 2.0-3.3 MeV 2061800300009 REL-REF (R,20570001,I.Szabo+,C,73KIEV,3,27,1973) 2061800300010 HISTORY (20180724A) On. EN-ERR -> EN-RSL-HW, DATA-ERR-> ERR-1, 2061800300011 ERR-2 added. 2061800300012 ENDBIB 10 0 2061800300013 NOCOMMON 0 0 2061800300014 DATA 5 13 2061800300015 EN EN-RSL-HW DATA ERR-1 ERR-2 2061800300016 MEV MEV B B PER-CENT 2061800300017 2.350 0.032 1.960 0.069 2.5 2061800300018 2.590 0.031 1.88 0.066 3.0 2061800300019 2.780 0.030 1.85 0.065 3.0 2061800300020 2.850 0.030 1.86 0.065 3.0 2061800300021 3.090 0.029 1.76 0.062 3.0 2061800300022 3.230 0.028 1.77 0.085 3.0 2061800300023 3.360 0.020 1.77 0.065 3.0 2061800300024 3.550 0.025 1.73 0.063 3.0 2061800300025 3.800 0.024 1.78 0.065 3.0 2061800300026 3.920 0.101 1.77 0.070 3.0 2061800300027 4.470 0.083 1.76 0.070 3.0 2061800300028 5.015 0.037 1.70 0.070 3.0 2061800300029 5.530 0.024 1.60 0.065 3.0 2061800300030 ENDDATA 15 0 2061800300031 ENDSUBENT 30 0 2061800399999 ENDENTRY 3 0 2061899999999