ENTRY 21494 20230516 231721494 0 1 SUBENT 21494001 20230516 231721494 1 1 BIB 12 81 21494 1 2 TITLE Measurements of the fission cross sections of 21494 1 3 Pu-239 and Pu-241 relative to that of U-235 in 21494 1 4 the neutron energy range 0.016 to 0.55 eV 21494 1 5 AUTHOR (P.H.White,J.M.A.Reichelt,G.P.Warner) 21494 1 6 INSTITUTE (2UK ALD) 21494 1 7 REFERENCE (C,66PARIS,2,29,1966) 21494 1 8 FACILITY (REAC,2UK ALD) HERALD Reactor at ALDERMASTON, for 21494 1 9 all the measurements. In addition for the 21494 1 10 measurements with monoenergetic neutrons 21494 1 11 (SPECC,2UK ALD) A crystal spectrometer with an 21494 1 12 Al crystal, using the 111-plane, and 21494 1 13 (SELVE,2UK ALD) 3 disc mechanical velocity selector in 21494 1 14 order to attenuate the 2nd and 3d order neutrons 21494 1 15 from the crystal spectrometer. The separation of 21494 1 16 the disks was 40 cm, the thickness of the Cd on each 21494 1 17 disc 0.05 cm, the number of slits on each disc 50. 21494 1 18 The angular velocity was stable within 0.5%. 21494 1 19 More details in table 1 of 66PARIS,2,29,1966. 21494 1 20 INC-SOURCE (REAC) For the mono-energetic measurements, and a 21494 1 21 (THCOL) For the measurements with a Maxwellian 21494 1 22 incoming neutron spectrum. One measurement was done 21494 1 23 within the graphite thermal column (temp of the 21494 1 24 Maxwellian 30+-7 deg C), another one was done with an 21494 1 25 external beam (temp of the Maxwellian 90+-10 deg C) 21494 1 26 SAMPLE Fission foil isotopic compositions, etc.: 21494 1 27 -------------------------------------------------------21494 1 28 Coun-! Nuc- ! Mass Number ! Thick-!Assay!Foil21494 1 29 ter ! lide ! 234 235 236 238 ! ness !error!th.*21494 1 30 ! mg/cm2! % ! % 21494 1 31 -------------------------------------------------------21494 1 32 1.2 U-235 1.19 92.95 0.18 5.68 0.5 1.0 5.9 21494 1 33 2.7 U-235 0.11 99.33 0.25 0.31 0.5 1.0 5.7 21494 1 34 -------------------------------------------------------21494 1 35 239 240 241 242 21494 1 36 -------------------------------------------------------21494 1 37 6.7 Pu-239 99.985 0.012 0.003 - 0.2 0.5 3.2 21494 1 38 6.12 Pu-239 99.985 0.012 0.003 - 0.06 0.5 0.7 21494 1 39 241.1 Pu-241 5.12 5.53 88.95 0.40 0.25 2.0 3.0 21494 1 40 241.2 Pu-241 5.12 5.53 88.95 0.40 0.08 2.0 1.1 21494 1 41 -------------------------------------------------------21494 1 42 * Foil thickness correction (%) 21494 1 43 DETECTOR (FISCH) Fission chambers, described in REL-REF. 21494 1 44 2*PI geometry, back-to-back foils Pu-239 or 21494 1 45 Pu-241 and U-235. 21494 1 46 REL-REF (M,21190001,P.H.White,J,JNE/AB,19,325,1965) 21494 1 47 (M,21463001,P.H.White,C,65SALZBURG,1,219,1965) 21494 1 48 (M,20584001,J.L.Perkin+,J,JNE/AB,19,423,1965) 21494 1 49 CORRECTION The measurements with monoenergetic neutrons were 21494 1 50 corrected for the stray neutron flux in the reactor 21494 1 51 hall (0.3-3.0% of the fission rate), higher order 21494 1 52 (than 3) in the spectrometer, incoherent scattering 21494 1 53 by the Al-crystal of the scatterer (determined with 21494 1 54 the rocking curve). The measurements with the incoming21494 1 55 Maxwellian spectra had negligible backgrounds (less 21494 1 56 than 0.1%) 21494 1 57 ERR-ANALYS (ERR-T) A complete error analysis is given in 21494 1 58 Table IV of main reference. 21494 1 59 (ERR-1) Error due to isotopic composition 21494 1 60 (ERR-2) Error due to fourth and higher order neutrons 21494 1 61 (ERR-3) Error due to incoherent background from 21494 1 62 crystal spectrometer 21494 1 63 (ERR-5) Error of weighing and assay of the plutonium 21494 1 64 sample foil 21494 1 65 (ERR-6) Error due to fission fragment absorption in 21494 1 66 plutonium sample foil 21494 1 67 (ERR-7) Error due to extrapolation of fission fragment21494 1 68 spectra to zero pulse height for plutonium 21494 1 69 (ERR-11) Error of weighing and assay of the uranium 21494 1 70 sample foil 21494 1 71 (ERR-12) Error due to fission fragment absorption in 21494 1 72 uranium sample foil 21494 1 73 (ERR-13) Error due to extrapolation of fission fragment21494 1 74 spectra to zero pulse height for uranium 21494 1 75 HISTORY (19800327T) G.C. From NDD 21494 1 76 (20070926A) Date, units and headings corrected. 21494 1 77 (20070928U) Last corrections have been done. 21494 1 78 Error structure from Table IV of main reference given 21494 1 79 (20160907A) SD: Values with FLAG=1 moved to another 21494 1 80 Subents (details in Subents 002-007). BIB update. 21494 1 81 (20211225A) SD: Corrections in Subents 004, 010, 011. 21494 1 82 (20230516A) SD: Corrections in Subents 002, 009. 21494 1 83 ENDBIB 81 0 21494 1 84 COMMON 3 3 21494 1 85 ERR-1 ERR-2 ERR-3 21494 1 86 PER-CENT PER-CENT PER-CENT 21494 1 87 0.1 0.2 0.3 21494 1 88 ENDCOMMON 3 0 21494 1 89 ENDSUBENT 88 0 21494 199999 SUBENT 21494002 20230516 231721494 2 1 BIB 5 17 21494 2 2 REACTION ((94-PU-239(N,F),,SIG)/(92-U-235(N,F),,SIG)) 21494 2 3 2200 m/sec value. 21494 2 4 ERR-ANALYS (ERR-8) Error due to the hardening of neutron spectrum21494 2 5 by captive in hardening materials 21494 2 6 (ERR-9) Error due to beam non-uniformity 21494 2 7 (ERR-10) Error due to uncertainty of neutron spectrum 21494 2 8 (ERR-S) Statistical error 21494 2 9 FLAG (2.) Data from measurement with extracted beam of 21494 2 10 the thermal column. 21494 2 11 (3.) Data from measurement within the thermal 21494 2 12 column. 21494 2 13 STATUS (TABLE,,P.H.White+,C,66PARIS,2,29,1966) Tbl. V 21494 2 14 HISTORY (19800327T) G.C. 21494 2 15 (20070926A) RATIO -> DATA, ARB-UNITS -> NO-DIM, EN-RSL 21494 2 16 and FLAG columns moved to col. 3,4. 21494 2 17 (20160907A) SD: Value with FLAG=1 moved to Subent 006. 21494 2 18 (20230516A) SD: ERR-T deleted from COMMON section. 21494 2 19 ENDBIB 17 0 21494 2 20 COMMON 11 6 21494 2 21 EN ERR-5 ERR-6 ERR-7 ERR-8 ERR-9 21494 2 22 ERR-10 ERR-11 ERR-12 ERR-13 ERR-S 21494 2 23 EV PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 21494 2 24 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 21494 2 25 0.0253 0.5 0.4 0.4 0.1 0.121494 2 26 1.0 0.5 0.5 1. 0.5 21494 2 27 ENDCOMMON 6 0 21494 2 28 DATA 3 2 21494 2 29 DATA ERR-T FLAG 21494 2 30 NO-DIM NO-DIM NO-DIM 21494 2 31 1.235 0.022 2. 21494 2 32 1.277 0.025 3. 21494 2 33 ENDDATA 4 0 21494 2 34 ENDSUBENT 33 0 21494 299999 SUBENT 21494003 20160907 225221494 3 1 BIB 5 19 21494 3 2 REACTION ((94-PU-241(N,F),,SIG)/(92-U-235(N,F),,SIG)) 21494 3 3 2200 m/sec value. 21494 3 4 ERR-ANALYS (ERR-8) Error due to the hardening of neutron spectrum21494 3 5 by captive in hardening materials 21494 3 6 (ERR-9) Error due to beam non-uniformity 21494 3 7 (ERR-10) Error due to uncertainty of neutron spectrum 21494 3 8 (ERR-14) Error due to decay of Pu-241 sample since its 21494 3 9 separation from Am-241 21494 3 10 (ERR-S) Statistical error 21494 3 11 FLAG (2.) Data from measurement with extracted beam of 21494 3 12 the thermal column. 21494 3 13 (3.) Data from measurement within the thermal 21494 3 14 column. 21494 3 15 STATUS (TABLE) Tbl. V of 66PARIS,2,29,1966 21494 3 16 HISTORY (19800327T) G.C. 21494 3 17 (20070926A) "RATIO" TO "DATA" , "ARB-UNITS" to 21494 3 18 "NO-DIM" changed, "EN-RSL" AND "FLAG" columns 21494 3 19 moved to col. 3,4 21494 3 20 (20160907A) SD: Value with FLAG=1 moved to Subent 007. 21494 3 21 ENDBIB 19 0 21494 3 22 COMMON 13 9 21494 3 23 EN ERR-5 ERR-6 ERR-7 ERR-8 ERR-9 21494 3 24 ERR-10 ERR-11 ERR-12 ERR-13 ERR-14 ERR-T 21494 3 25 ERR-S 21494 3 26 EV PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 21494 3 27 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT NO-DIM 21494 3 28 PER-CENT 21494 3 29 0.0253 2.0 0.4 0.4 0.1 0.1 21494 3 30 1.0 0.5 0.5 1. 0.1 0.048 21494 3 31 0.5 21494 3 32 ENDCOMMON 9 0 21494 3 33 DATA 2 2 21494 3 34 DATA FLAG 21494 3 35 NO-DIM NO-DIM 21494 3 36 1.722 2. 21494 3 37 1.782 3. 21494 3 38 ENDDATA 4 0 21494 3 39 ENDSUBENT 38 0 21494 399999 SUBENT 21494004 20211225 230621494 4 1 BIB 7 20 21494 4 2 REACTION (94-PU-239(N,F),,SIG) 2200 m/sec value. 21494 4 3 MONITOR (92-U-235(N,F),,SIG) 2200 m/sec value 21494 4 4 INC-SOURCE Neutrons from or within thermal column 21494 4 5 ERR-ANALYS (ERR-8) Error due to the hardening of neutron spectrum21494 4 6 by captive in hardening materials 21494 4 7 (ERR-9) Error due to beam non-uniformity 21494 4 8 (ERR-10) Error due to uncertainty of neutron spectrum 21494 4 9 (ERR-S) Statistical error 21494 4 10 FLAG (2.) Data from measurement with extracted beam of 21494 4 11 the thermal column. 21494 4 12 (3.) Data from measurement within the thermal 21494 4 13 column. 21494 4 14 STATUS (TABLE) Tbl. V of 66PARIS,2,29,1966 21494 4 15 (COREL,21494010) data meausred with 21494 4 16 neutrons from crystal spectrometer 21494 4 17 HISTORY (19800327T) G.C. 21494 4 18 (20070928U) Last checking has been done. 21494 4 19 (20160907A) SD: Value of cross section from the 21494 4 20 monoenergetic neutron source moved to Subent 010. 21494 4 21 (20211225U) SD:Small correction in prev. history string21494 4 22 ENDBIB 20 0 21494 4 23 COMMON 12 6 21494 4 24 EN MONIT ERR-5 ERR-6 ERR-7 ERR-8 21494 4 25 ERR-9 ERR-10 ERR-11 ERR-12 ERR-13 ERR-S 21494 4 26 EV B PER-CENT PER-CENT PER-CENT PER-CENT 21494 4 27 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 21494 4 28 0.0253 577. 0.5 0.4 0.4 0.1 21494 4 29 0.1 1.0 0.5 0.5 1. 0.5 21494 4 30 ENDCOMMON 6 0 21494 4 31 DATA 3 2 21494 4 32 DATA ERR-T FLAG 21494 4 33 B B NO-DIM 21494 4 34 713. 15. 2. 21494 4 35 737. 17. 3. 21494 4 36 ENDDATA 4 0 21494 4 37 ENDSUBENT 36 0 21494 499999 SUBENT 21494005 20160907 225221494 5 1 BIB 7 20 21494 5 2 REACTION (94-PU-241(N,F),,SIG) 2200 m/sec value. 21494 5 3 MONITOR (92-U-235(N,F),,SIG) 2200 m/sec value 577 b. 21494 5 4 COMMENT Deduced from thermal measurements 21494 5 5 ERR-ANALYS (ERR-8) Error due to the hardening of neutron spectrum21494 5 6 by captive in hardening materials 21494 5 7 (ERR-9) Error due to beam non-uniformity 21494 5 8 (ERR-10) Error due to uncertainty of neutron spectrum 21494 5 9 (ERR-14) Error due to decay of Pu-241 sample since its 21494 5 10 separation from Am-241 21494 5 11 (ERR-S) Statistical error 21494 5 12 FLAG (2.) Data from measurement with extracted beam of 21494 5 13 the thermal column. 21494 5 14 (3.) Data from measurement within the thermal 21494 5 15 column. 21494 5 16 STATUS (TABLE) Tbl. V of 66PARIS,2,29,1966 21494 5 17 HISTORY (19800327T) G.C. 21494 5 18 (20070926U) Columns "EN-RSL" AND "FLAG"- moved to 21494 5 19 cols 3,4 21494 5 20 (20160907A) SD: Value of cross section from the 21494 5 21 monoenergetic neutron source moved to Subent 011. 21494 5 22 ENDBIB 20 0 21494 5 23 COMMON 15 9 21494 5 24 EN MONIT ERR-5 ERR-6 ERR-7 ERR-8 21494 5 25 ERR-9 ERR-10 ERR-11 ERR-12 ERR-13 ERR-14 21494 5 26 ERR-T ERR-T ERR-S 21494 5 27 EV B PER-CENT PER-CENT PER-CENT PER-CENT 21494 5 28 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 21494 5 29 PER-CENT PER-CENT PER-CENT 21494 5 30 0.0253 577. 2.0 0.4 0.4 0.1 21494 5 31 0.1 1.0 0.5 0.5 1. 0.1 21494 5 32 2.7 29. 0.5 21494 5 33 ENDCOMMON 9 0 21494 5 34 DATA 2 2 21494 5 35 DATA FLAG 21494 5 36 B NO-DIM 21494 5 37 994. 2. 21494 5 38 1028. 3. 21494 5 39 ENDDATA 4 0 21494 5 40 ENDSUBENT 39 0 21494 599999 SUBENT 21494006 20160907 225221494 6 1 BIB 5 10 21494 6 2 REACTION ((94-PU-239(N,F),,SIG)/(92-U-235(N,F),,SIG)) 21494 6 3 COMMENT The energy resolution function is asymmetric. 21494 6 4 ERR-ANALYS (ERR-4) Error due to neutron beam non-uniformity 21494 6 5 (ERR-S) Statistical error 21494 6 6 STATUS (TABLE) Tbl. VI of 66PARIS,2,29,1966 21494 6 7 HISTORY (19800327T) G.C. 21494 6 8 (20070926A) "RATIO" TO "DATA" , "ARB-UNITS" to 21494 6 9 "NO-DIM" changed. Error structure given. 21494 6 10 (20160907A) SD: Two values added from Subents 002,004. 21494 6 11 Values of ERR-T in % deleted (duplication excluded). 21494 6 12 ENDBIB 10 0 21494 6 13 COMMON 7 6 21494 6 14 ERR-4 ERR-5 ERR-6 ERR-7 ERR-11 ERR-12 21494 6 15 ERR-13 21494 6 16 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 21494 6 17 PER-CENT 21494 6 18 0.5 0.4 0.4 1.0 0.5 0.521494 6 19 1. 21494 6 20 ENDCOMMON 6 0 21494 6 21 DATA 6 8 21494 6 22 EN EN-RSL EN-ERR DATA ERR-T ERR-S 21494 6 23 EV PER-CENT MILLI-EV NO-DIM NO-DIM PER-CENT 21494 6 24 0.016 1.0 0.04 1.208 0.022 0.521494 6 25 0.0253 1.4 1.253 0.022 0.521494 6 26 0.0253 1.4 723. 15. 0.521494 6 27 0.051 4.0 0.5 1.374 0.024 0.521494 6 28 0.117 6.6 2. 2.010 0.036 0.521494 6 29 0.161 7.8 3. 2.93 0.05 0.521494 6 30 0.270 10.2 7. 12.51 0.3 0.521494 6 31 0.545 14.4 20. 1.94 0.05 1.021494 6 32 ENDDATA 10 0 21494 6 33 ENDSUBENT 32 0 21494 699999 SUBENT 21494007 20160907 225221494 7 1 BIB 5 12 21494 7 2 REACTION ((94-PU-241(N,F),,SIG)/(92-U-235(N,F),,SIG)) 21494 7 3 COMMENT .The energy resolution function is asymmetric. 21494 7 4 ERR-ANALYS (ERR-4) Error due to neutron beam non-uniformity 21494 7 5 (ERR-14) Error due to decay of Pu-241 sample since its 21494 7 6 separation from Am-241 21494 7 7 (ERR-S) Statistical error 21494 7 8 STATUS (TABLE) Tbl. VI of 66PARIS,2,29,1966 21494 7 9 HISTORY (19800327T) G.C. 21494 7 10 (20070926A) "RATIO" TO "DATA" , "ARB-UNITS" to 21494 7 11 "NO-DIM" changed. Error structure given 21494 7 12 (20160907A) SD: Two values added from Subents 003,005. 21494 7 13 Values of ERR-T in % deleted (duplication excluded). 21494 7 14 ENDBIB 12 0 21494 7 15 COMMON 8 6 21494 7 16 ERR-4 ERR-5 ERR-6 ERR-7 ERR-11 ERR-12 21494 7 17 ERR-13 ERR-14 21494 7 18 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 21494 7 19 PER-CENT PER-CENT 21494 7 20 1. 2.0 0.4 0.4 1.0 0.521494 7 21 0.5 0.1 21494 7 22 ENDCOMMON 6 0 21494 7 23 DATA 6 8 21494 7 24 EN EN-RSL EN-ERR DATA ERR-T ERR-S 21494 7 25 EV PER-CENT MILLI-EV NO-DIM NO-DIM PER-CENT 21494 7 26 0.016 1.0 0.04 1.681 0.044 0.521494 7 27 0.0253 1.4 1.772 0.048 0.521494 7 28 0.0253 1.4 1022. 29. 0.521494 7 29 0.051 4.0 0.5 1.876 0.05 0.521494 7 30 0.117 6.6 2. 2.719 0.07 0.521494 7 31 0.161 7.8 3. 3.96 0.10 0.521494 7 32 0.270 10.2 7. 8.23 0.3 0.521494 7 33 0.545 14.4 20. 0.806 0.02 1.021494 7 34 ENDDATA 10 0 21494 7 35 ENDSUBENT 34 0 21494 799999 SUBENT 21494008 20160907 225221494 8 1 BIB 5 12 21494 8 2 REACTION ((94-PU-239(N,F),,SIG,,MXW)/ 21494 8 3 (92-U-235(N,F),,SIG,,MXW)) At 30. And 90. Degr. C. 21494 8 4 ERR-ANALYS (ERR-8) Error due to the hardening of neutron spectrum21494 8 5 by captive in hardening materials 21494 8 6 (ERR-9) Error due to beam non-uniformity 21494 8 7 (ERR-10) Error due to uncertainty of neutron spectrum 21494 8 8 INC-SPECT Reactions induced by extracted beam neutrons 21494 8 9 and by neutrons inside a thermal column. 21494 8 10 STATUS (TABLE) Tbl. V of 66PARIS,2,29,1966 21494 8 11 HISTORY (19800328T) G.C. 21494 8 12 (20070926A) "RATIO" TO "DATA" , "ARB-UNITS" to 21494 8 13 "NO-DIM" changed 21494 8 14 ENDBIB 12 0 21494 8 15 COMMON 11 6 21494 8 16 ERR-5 ERR-6 ERR-7 ERR-8 ERR-9 ERR-10 21494 8 17 ERR-11 ERR-12 ERR-13 ERR-T ERR-T 21494 8 18 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 21494 8 19 PER-CENT PER-CENT PER-CENT NO-DIM PER-CENT 21494 8 20 0.5 0.4 0.4 0.1 0.1 1.0 21494 8 21 1.0 0.5 0.5 0.02 1.8 21494 8 22 ENDCOMMON 6 0 21494 8 23 DATA 2 2 21494 8 24 EN-DUMMY DATA 21494 8 25 EV NO-DIM 21494 8 26 0.0253 1.385 21494 8 27 0.0313 1.405 21494 8 28 ENDDATA 4 0 21494 8 29 ENDSUBENT 28 0 21494 899999 SUBENT 21494009 20230516 231721494 9 1 BIB 5 15 21494 9 2 REACTION ((94-PU-241(N,F),,SIG,,MXW)/ 21494 9 3 (92-U-235(N,F),,SIG,,MXW)) At 30. And 90. Degr C. 21494 9 4 INC-SPECT Reactions induced by neutrons of an extracted 21494 9 5 beam (90 degr. C) and by neutrons inside a thermal 21494 9 6 column (30 deg. C) 21494 9 7 ERR-ANALYS (ERR-8) Error due to the hardening of neutron spectrum21494 9 8 by captive in hardening materials 21494 9 9 (ERR-9) Error due to beam non-uniformity 21494 9 10 (ERR-10) Error due to uncertainty of neutron spectrum 21494 9 11 (ERR-14) Error due to decay of Pu-241 sample since its 21494 9 12 separation from Am-241 21494 9 13 STATUS (TABLE,,P.H.White+,C,66PARIS,2,29,1966) Tbl. V 21494 9 14 HISTORY (19800328T) G.C. 21494 9 15 (20070926A) RATIO -> DATA, ARB-UNITS -> NO-DIM. 21494 9 16 (20230516A) SD: ERR-T deleted from COMMON section. 21494 9 17 ENDBIB 15 0 21494 9 18 COMMON 10 6 21494 9 19 ERR-5 ERR-6 ERR-7 ERR-8 ERR-9 ERR-10 21494 9 20 ERR-11 ERR-12 ERR-13 ERR-14 21494 9 21 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 21494 9 22 PER-CENT PER-CENT PER-CENT PER-CENT 21494 9 23 2.0 0.4 0.4 0.1 0.1 1.021494 9 24 1.0 0.5 0.5 0.1 21494 9 25 ENDCOMMON 6 0 21494 9 26 DATA 3 2 21494 9 27 EN-DUMMY DATA ERR-T 21494 9 28 EV NO-DIM NO-DIM 21494 9 29 0.0253 1.920 0.047 21494 9 30 0.0313 1.966 0.048 21494 9 31 ENDDATA 4 0 21494 9 32 ENDSUBENT 31 0 21494 999999 SUBENT 21494010 20211225 230621494 10 1 BIB 6 13 21494 10 2 REACTION (94-PU-239(N,F),,SIG) 2200 m/sec value. 21494 10 3 MONITOR (92-U-235(N,F),,SIG) 2200 m/sec value 21494 10 4 INC-SOURCE Monoenergetic neutron source 21494 10 5 ERR-ANALYS (ERR-8) Error due to the hardening of neutron spectrum21494 10 6 by captive in hardening materials 21494 10 7 (ERR-9) Error due to beam non-uniformity 21494 10 8 (ERR-10) Error due to uncertainty of neutron spectrum 21494 10 9 (ERR-S) Statistical error 21494 10 10 STATUS (TABLE) Tbl. V of 66PARIS,2,29,1966 21494 10 11 (COREL,21494004) data meausred with 21494 10 12 neutrons from thermal column 21494 10 13 HISTORY (20160907T) SD: Part of Subent 004. 21494 10 14 (20211225U) SD:Small correction in prev. history string21494 10 15 ENDBIB 13 0 21494 10 16 COMMON 11 6 21494 10 17 MONIT ERR-5 ERR-6 ERR-7 ERR-8 ERR-9 21494 10 18 ERR-10 ERR-11 ERR-12 ERR-13 ERR-S 21494 10 19 B PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 21494 10 20 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 21494 10 21 577. 0.5 0.4 0.4 0.1 0.121494 10 22 1.0 0.5 0.5 1. 0.5 21494 10 23 ENDCOMMON 6 0 21494 10 24 DATA 3 1 21494 10 25 EN DATA ERR-T 21494 10 26 EV B B 21494 10 27 0.0253 723. 15. 21494 10 28 ENDDATA 3 0 21494 10 29 ENDSUBENT 28 0 21494 1099999 SUBENT 21494011 20211225 230621494 11 1 BIB 6 14 21494 11 2 REACTION (94-PU-241(N,F),,SIG) 2200 m/sec value. 21494 11 3 MONITOR (92-U-235(N,F),,SIG) 2200 m/sec value 577 b. 21494 11 4 INC-SOURCE Monoenergetic neutron source 21494 11 5 ERR-ANALYS (ERR-8) Error due to the hardening of neutron spectrum21494 11 6 by captive in hardening materials 21494 11 7 (ERR-9) Error due to beam non-uniformity 21494 11 8 (ERR-10) Error due to uncertainty of neutron spectrum 21494 11 9 (ERR-14) Error due to decay of Pu-241 sample since its 21494 11 10 separation from Am-241 21494 11 11 (ERR-S) Statistical error 21494 11 12 STATUS (TABLE) Tbl. V of 66PARIS,2,29,1966 21494 11 13 HISTORY (20160907T) SD: Part of Subent 005. 21494 11 14 (20211225A) SD:Small correction in prev. history string21494 11 15 Energy and total error repeated in COMMON deleted. 21494 11 16 ENDBIB 14 0 21494 11 17 COMMON 12 6 21494 11 18 MONIT ERR-5 ERR-6 ERR-7 ERR-8 ERR-9 21494 11 19 ERR-10 ERR-11 ERR-12 ERR-13 ERR-14 ERR-S 21494 11 20 B PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 21494 11 21 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 21494 11 22 577. 2.0 0.4 0.4 0.1 0.121494 11 23 1.0 0.5 0.5 1. 0.1 0.521494 11 24 ENDCOMMON 6 0 21494 11 25 DATA 3 1 21494 11 26 EN DATA ERR-T 21494 11 27 EV B B 21494 11 28 0.0253 1022. 29. 21494 11 29 ENDDATA 3 0 21494 11 30 ENDSUBENT 29 0 21494 1199999 ENDENTRY 11 0 2149499999999