ENTRY 21515 20230207 231321515 0 1 SUBENT 21515001 20230207 231321515 1 1 BIB 12 39 21515 1 2 TITLE Energy dependence of U-233, U-235, Pu-239 fast 21515 1 3 neutron cross sections 21515 1 4 AUTHOR (D.Szteinsznaider,V.Naggiar,F.Netter) 21515 1 5 REFERENCE (C,55GENEVA,4,245,1955) 21515 1 6 (J,JPR,17,565,1956) Extension of former measurements 21515 1 7 for U-233. 21515 1 8 INSTITUTE (2FR SAC) 21515 1 9 FACILITY (VDG,2FR SAC) 21515 1 10 INC-SOURCE (P-LI7) Proton energy dispersion about 0.5% 21515 1 11 for a current of 8 micro-Ampere. Li-layer prepared 21515 1 12 by thermal evaporation on a tantalum carrier, 0.3 mm 21515 1 13 thick, 200 ug/cm2. 21515 1 14 SAMPLE 2 mg Pu containing 1% impurities (uranium) 21515 1 15 20 mg U-235 enriched uranium obtained with an 21515 1 16 isotope separator, U-238/U-235 = 6.72+-0.10. 21515 1 17 0.7 mg U-233 target containing 50 % natural 21515 1 18 uranium. Also a 20 mg natural U-target. 21515 1 19 METHOD (STTA) Back-to-back foils used to compare two 21515 1 20 cross sections. 21515 1 21 DETECTOR (FISCH) Fission chamber for the comparison of 21515 1 22 U-235 and U-233 with Pu-239, 21515 1 23 (LONGC) Long counter as a monitor for the 21515 1 24 measurement of the Pu-239 cross section shape 21515 1 25 between 1500 and 2000 keV. The efficiency of this 21515 1 26 counter as a function of the energy has been 21515 1 27 measured with a recoil proton counter. 21515 1 28 CORRECTION Excited state of be-7 at 435 KeV. 21515 1 29 Fissions induced by scattered neutrons. 21515 1 30 ERR-ANALYS Total error compounded from: 21515 1 31 (ERR-1) 2% normalization error, 21515 1 32 (ERR-S) 2% statistical error, 21515 1 33 Errors caused by scattered neutrons. 21515 1 34 HISTORY (19800416T) G.C. 21515 1 35 (20070926A) Date is corrected. Error structure given. 21515 1 36 Headings and units corrected 21515 1 37 DATA-ERR to ERR-T changed 21515 1 38 (20070930U) Last corrections have been done. 21515 1 39 (20230207U) SD: Small correction in all Subents. 21515 1 40 Page of the ref. corrected (425 -> 245). 21515 1 41 ENDBIB 39 0 21515 1 42 COMMON 2 3 21515 1 43 ERR-S ERR-1 21515 1 44 PER-CENT PER-CENT 21515 1 45 2. 2. 21515 1 46 ENDCOMMON 3 0 21515 1 47 ENDSUBENT 46 0 21515 199999 SUBENT 21515002 20230207 231321515 2 1 BIB 5 6 21515 2 2 REACTION (94-PU-239(N,F),,SIG,,AV) 21515 2 3 MONITOR (92-U-0(N,F),,SIG) 21515 2 4 ERR-ANALYS (ERR-T) Total error 21515 2 5 STATUS (TABLE) From SUMMARY of the 55GENEVA,4,245,1955 21515 2 6 HISTORY (20070930A) REACTION SF8="AV" added. 21515 2 7 (20230207U) SD: BIB updated. 21515 2 8 ENDBIB 6 0 21515 2 9 NOCOMMON 0 0 21515 2 10 DATA 6 1 21515 2 11 EN-MIN EN-MAX DATA ERR-T EN-NRM MONIT 21515 2 12 MEV MEV B B MEV B 21515 2 13 0.150 2. 2.04 0.12 1.6 0.34 21515 2 14 ENDDATA 3 0 21515 2 15 ENDSUBENT 14 0 21515 299999 SUBENT 21515003 20230207 231321515 3 1 BIB 4 7 21515 3 2 REACTION ((94-PU-239(N,F),,SIG,,AV)/ 21515 3 3 (92-U-235(N,F),,SIG,,AV)) 21515 3 4 ERR-ANALYS (ERR-T) Total error 21515 3 5 STATUS (TABLE) Text on p.247 of the 55GENEVA,4,245,1955 21515 3 6 HISTORY (20070930A) REACTION SF8="AV" added. 21515 3 7 RATIO to DATA, ARB-UNITS to NO-DIM changed 21515 3 8 (20230207U) SD: BIB updated. 21515 3 9 ENDBIB 7 0 21515 3 10 NOCOMMON 0 0 21515 3 11 DATA 4 1 21515 3 12 EN-MIN EN-MAX DATA ERR-T 21515 3 13 MEV MEV NO-DIM NO-DIM 21515 3 14 0.7 1. 1.78 0.1 21515 3 15 ENDDATA 3 0 21515 3 16 ENDSUBENT 15 0 21515 399999 SUBENT 21515004 20230207 231321515 4 1 BIB 4 6 21515 4 2 REACTION ((94-PU-239(N,F),,SIG)/(92-U-233(N,F),,SIG)) 21515 4 3 ERR-ANALYS (ERR-T) Total error 21515 4 4 STATUS (TABLE) Text on p.247 of the 55GENEVA,4,245,1955 21515 4 5 HISTORY (20070930A) RATIO To DATA, ARB-UNITS to NO-DIM 21515 4 6 changed 21515 4 7 (20230207U) SD: BIB updated. 21515 4 8 ENDBIB 6 0 21515 4 9 NOCOMMON 0 0 21515 4 10 DATA 3 1 21515 4 11 EN DATA ERR-T 21515 4 12 MEV NO-DIM NO-DIM 21515 4 13 8.5E-01 1.06 6.E-02 21515 4 14 ENDDATA 3 0 21515 4 15 ENDSUBENT 14 0 21515 499999 SUBENT 21515005 20230207 231321515 5 1 BIB 4 5 21515 5 2 REACTION (92-U-235(N,F),,SIG) 21515 5 3 MONITOR (92-U-0(N,F),,SIG) 21515 5 4 STATUS (NDD) Data taken from NEUDADA 21515 5 5 HISTORY (20070930A) Averaged data moved to SAN 008 21515 5 6 (20230207U) SD: BIB updated. 21515 5 7 ENDBIB 5 0 21515 5 8 NOCOMMON 0 0 21515 5 9 DATA 2 7 21515 5 10 EN DATA 21515 5 11 MEV B 21515 5 12 0.050 2.60 21515 5 13 0.100 2.00 21515 5 14 0.198 1.60 21515 5 15 0.298 1.44 21515 5 16 0.398 1.29 21515 5 17 0.499 1.19 21515 5 18 0.592 1.15 21515 5 19 ENDDATA 9 0 21515 5 20 ENDSUBENT 19 0 21515 599999 SUBENT 21515006 20230207 231321515 6 1 BIB 5 5 21515 6 2 REACTION (92-U-233(N,F),,SIG) 21515 6 3 MONITOR (92-U-0(N,F),,SIG) 21515 6 4 ERR-ANALYS (ERR-T) Total error 21515 6 5 STATUS (NDD) Data taken from NEUDADA 21515 6 6 HISTORY (20230207U) SD: BIB updated. 21515 6 7 ENDBIB 5 0 21515 6 8 NOCOMMON 0 0 21515 6 9 DATA 3 35 21515 6 10 EN DATA ERR-T 21515 6 11 MEV B B 21515 6 12 0.70 2.05 21515 6 13 0.76 1.92 21515 6 14 0.85 1.92 0.25 21515 6 15 0.88 2.08 21515 6 16 0.90 1.88 21515 6 17 0.90 1.92 21515 6 18 0.90 1.98 21515 6 19 1.02 2.10 21515 6 20 1.02 2.18 21515 6 21 1.24 1.72 21515 6 22 1.24 2.03 21515 6 23 1.42 1.94 21515 6 24 1.44 1.92 21515 6 25 1.60 1.99 21515 6 26 1.60 2.04 21515 6 27 1.79 1.86 21515 6 28 1.80 1.94 21515 6 29 1.96 1.86 21515 6 30 1.96 1.88 21515 6 31 2.16 1.88 21515 6 32 2.16 1.95 21515 6 33 2.16 2.02 21515 6 34 2.17 1.77 21515 6 35 2.36 1.93 21515 6 36 2.38 2.01 21515 6 37 2.57 1.65 21515 6 38 2.57 1.73 21515 6 39 2.57 1.90 21515 6 40 2.76 2.00 21515 6 41 2.76 2.02 21515 6 42 2.98 1.51 21515 6 43 2.98 1.71 21515 6 44 3.01 1.63 21515 6 45 3.14 1.72 21515 6 46 3.36 1.70 21515 6 47 ENDDATA 37 0 21515 6 48 ENDSUBENT 47 0 21515 699999 SUBENT 21515007 20230207 231321515 7 1 BIB 5 6 21515 7 2 REACTION (92-U-235(N,F),,SIG,,AV) 21515 7 3 MONITOR (92-U-0(N,F),,SIG) 21515 7 4 ERR-ANALYS (ERR-T) Total error 21515 7 5 STATUS (TABLE) Text on p.248 of the 55GENEVA,4,245,1955 21515 7 6 HISTORY (20070930C) SM 21515 7 7 (20230207U) SD: BIB updated. 21515 7 8 ENDBIB 6 0 21515 7 9 NOCOMMON 0 0 21515 7 10 DATA 4 1 21515 7 11 EN-MIN EN-MAX DATA ERR-T 21515 7 12 MEV MEV B B 21515 7 13 0.7 1. 1.15 0.15 21515 7 14 ENDDATA 3 0 21515 7 15 ENDSUBENT 14 0 21515 799999 ENDENTRY 7 0 2151599999999