ENTRY 21515 20230207 2151500000001 SUBENT 21515001 20230207 20231011 2151500100001 BIB 12 39 2151500100002 TITLE Energy dependence of U-233, U-235, Pu-239 fast 2151500100003 neutron cross sections 2151500100004 AUTHOR (D.Szteinsznaider,V.Naggiar,F.Netter) 2151500100005 REFERENCE (C,55GENEVA,4,245,1955) 2151500100006 (J,JPR,17,565,1956) Extension of former measurements 2151500100007 for U-233. 2151500100008 INSTITUTE (2FR SAC) 2151500100009 FACILITY (VDG,2FR SAC) 2151500100010 INC-SOURCE (P-LI7) Proton energy dispersion about 0.5% 2151500100011 for a current of 8 micro-Ampere. Li-layer prepared 2151500100012 by thermal evaporation on a tantalum carrier, 0.3 mm 2151500100013 thick, 200 ug/cm2. 2151500100014 SAMPLE 2 mg Pu containing 1% impurities (uranium) 2151500100015 20 mg U-235 enriched uranium obtained with an 2151500100016 isotope separator, U-238/U-235 = 6.72+-0.10. 2151500100017 0.7 mg U-233 target containing 50 % natural 2151500100018 uranium. Also a 20 mg natural U-target. 2151500100019 METHOD (STTA) Back-to-back foils used to compare two 2151500100020 cross sections. 2151500100021 DETECTOR (FISCH) Fission chamber for the comparison of 2151500100022 U-235 and U-233 with Pu-239, 2151500100023 (LONGC) Long counter as a monitor for the 2151500100024 measurement of the Pu-239 cross section shape 2151500100025 between 1500 and 2000 keV. The efficiency of this 2151500100026 counter as a function of the energy has been 2151500100027 measured with a recoil proton counter. 2151500100028 CORRECTION Excited state of be-7 at 435 KeV. 2151500100029 Fissions induced by scattered neutrons. 2151500100030 ERR-ANALYS Total error compounded from: 2151500100031 (ERR-1) 2% normalization error, 2151500100032 (ERR-S) 2% statistical error, 2151500100033 Errors caused by scattered neutrons. 2151500100034 HISTORY (19800416T) G.C. 2151500100035 (20070926A) Date is corrected. Error structure given. 2151500100036 Headings and units corrected 2151500100037 DATA-ERR to ERR-T changed 2151500100038 (20070930U) Last corrections have been done. 2151500100039 (20230207U) SD: Small correction in all Subents. 2151500100040 Page of the ref. corrected (425 -> 245). 2151500100041 ENDBIB 39 0 2151500100042 COMMON 2 3 2151500100043 ERR-S ERR-1 2151500100044 PER-CENT PER-CENT 2151500100045 2. 2. 2151500100046 ENDCOMMON 3 0 2151500100047 ENDSUBENT 46 0 2151500199999 SUBENT 21515002 20230207 20231011 2151500200001 BIB 5 6 2151500200002 REACTION (94-PU-239(N,F),,SIG,,AV) 2151500200003 MONITOR (92-U-0(N,F),,SIG) 2151500200004 ERR-ANALYS (ERR-T) Total error 2151500200005 STATUS (TABLE) From SUMMARY of the 55GENEVA,4,245,1955 2151500200006 HISTORY (20070930A) REACTION SF8="AV" added. 2151500200007 (20230207U) SD: BIB updated. 2151500200008 ENDBIB 6 0 2151500200009 NOCOMMON 0 0 2151500200010 DATA 6 1 2151500200011 EN-MIN EN-MAX DATA ERR-T EN-NRM MONIT 2151500200012 MEV MEV B B MEV B 2151500200013 0.150 2. 2.04 0.12 1.6 0.34 2151500200014 ENDDATA 3 0 2151500200015 ENDSUBENT 14 0 2151500299999 SUBENT 21515003 20230207 20231011 2151500300001 BIB 4 7 2151500300002 REACTION ((94-PU-239(N,F),,SIG,,AV)/ 2151500300003 (92-U-235(N,F),,SIG,,AV)) 2151500300004 ERR-ANALYS (ERR-T) Total error 2151500300005 STATUS (TABLE) Text on p.247 of the 55GENEVA,4,245,1955 2151500300006 HISTORY (20070930A) REACTION SF8="AV" added. 2151500300007 RATIO to DATA, ARB-UNITS to NO-DIM changed 2151500300008 (20230207U) SD: BIB updated. 2151500300009 ENDBIB 7 0 2151500300010 NOCOMMON 0 0 2151500300011 DATA 4 1 2151500300012 EN-MIN EN-MAX DATA ERR-T 2151500300013 MEV MEV NO-DIM NO-DIM 2151500300014 0.7 1. 1.78 0.1 2151500300015 ENDDATA 3 0 2151500300016 ENDSUBENT 15 0 2151500399999 SUBENT 21515004 20230207 20231011 2151500400001 BIB 4 6 2151500400002 REACTION ((94-PU-239(N,F),,SIG)/(92-U-233(N,F),,SIG)) 2151500400003 ERR-ANALYS (ERR-T) Total error 2151500400004 STATUS (TABLE) Text on p.247 of the 55GENEVA,4,245,1955 2151500400005 HISTORY (20070930A) RATIO To DATA, ARB-UNITS to NO-DIM 2151500400006 changed 2151500400007 (20230207U) SD: BIB updated. 2151500400008 ENDBIB 6 0 2151500400009 NOCOMMON 0 0 2151500400010 DATA 3 1 2151500400011 EN DATA ERR-T 2151500400012 MEV NO-DIM NO-DIM 2151500400013 8.5E-01 1.06 6.E-02 2151500400014 ENDDATA 3 0 2151500400015 ENDSUBENT 14 0 2151500499999 SUBENT 21515005 20230207 20231011 2151500500001 BIB 4 5 2151500500002 REACTION (92-U-235(N,F),,SIG) 2151500500003 MONITOR (92-U-0(N,F),,SIG) 2151500500004 STATUS (NDD) Data taken from NEUDADA 2151500500005 HISTORY (20070930A) Averaged data moved to SAN 008 2151500500006 (20230207U) SD: BIB updated. 2151500500007 ENDBIB 5 0 2151500500008 NOCOMMON 0 0 2151500500009 DATA 2 7 2151500500010 EN DATA 2151500500011 MEV B 2151500500012 0.050 2.60 2151500500013 0.100 2.00 2151500500014 0.198 1.60 2151500500015 0.298 1.44 2151500500016 0.398 1.29 2151500500017 0.499 1.19 2151500500018 0.592 1.15 2151500500019 ENDDATA 9 0 2151500500020 ENDSUBENT 19 0 2151500599999 SUBENT 21515006 20230207 20231011 2151500600001 BIB 5 5 2151500600002 REACTION (92-U-233(N,F),,SIG) 2151500600003 MONITOR (92-U-0(N,F),,SIG) 2151500600004 ERR-ANALYS (ERR-T) Total error 2151500600005 STATUS (NDD) Data taken from NEUDADA 2151500600006 HISTORY (20230207U) SD: BIB updated. 2151500600007 ENDBIB 5 0 2151500600008 NOCOMMON 0 0 2151500600009 DATA 3 35 2151500600010 EN DATA ERR-T 2151500600011 MEV B B 2151500600012 0.70 2.05 2151500600013 0.76 1.92 2151500600014 0.85 1.92 0.25 2151500600015 0.88 2.08 2151500600016 0.90 1.88 2151500600017 0.90 1.92 2151500600018 0.90 1.98 2151500600019 1.02 2.10 2151500600020 1.02 2.18 2151500600021 1.24 1.72 2151500600022 1.24 2.03 2151500600023 1.42 1.94 2151500600024 1.44 1.92 2151500600025 1.60 1.99 2151500600026 1.60 2.04 2151500600027 1.79 1.86 2151500600028 1.80 1.94 2151500600029 1.96 1.86 2151500600030 1.96 1.88 2151500600031 2.16 1.88 2151500600032 2.16 1.95 2151500600033 2.16 2.02 2151500600034 2.17 1.77 2151500600035 2.36 1.93 2151500600036 2.38 2.01 2151500600037 2.57 1.65 2151500600038 2.57 1.73 2151500600039 2.57 1.90 2151500600040 2.76 2.00 2151500600041 2.76 2.02 2151500600042 2.98 1.51 2151500600043 2.98 1.71 2151500600044 3.01 1.63 2151500600045 3.14 1.72 2151500600046 3.36 1.70 2151500600047 ENDDATA 37 0 2151500600048 ENDSUBENT 47 0 2151500699999 SUBENT 21515007 20230207 20231011 2151500700001 BIB 5 6 2151500700002 REACTION (92-U-235(N,F),,SIG,,AV) 2151500700003 MONITOR (92-U-0(N,F),,SIG) 2151500700004 ERR-ANALYS (ERR-T) Total error 2151500700005 STATUS (TABLE) Text on p.248 of the 55GENEVA,4,245,1955 2151500700006 HISTORY (20070930C) SM 2151500700007 (20230207U) SD: BIB updated. 2151500700008 ENDBIB 6 0 2151500700009 NOCOMMON 0 0 2151500700010 DATA 4 1 2151500700011 EN-MIN EN-MAX DATA ERR-T 2151500700012 MEV MEV B B 2151500700013 0.7 1. 1.15 0.15 2151500700014 ENDDATA 3 0 2151500700015 ENDSUBENT 14 0 2151500799999 ENDENTRY 7 0 2151599999999