ENTRY 12331 20231017 150912331000 1 SUBENT 12331001 20231017 150912331001 1 BIB 10 26 12331001 2 TITLE Neutron capture to fission ratios in U233,U235,Pu239 12331001 3 AUTHOR (J.C.Hopkins, B.C.Diven) 12331001 4 REFERENCE (J,NSE,12,169,1962) 12331001 5 #doi:10.13182/NSE62-A26055 12331001 6 (C,61SACLAY,,407,1961) alpha values in figs 12331001 7 (C,61VIENNA,1,111,1961) alpha values in figs 12331001 8 (W,CAPOTE,20221018) Revised data for Pu239(n,g) 12331001 9 INSTITUTE (1USALAS) 12331001 10 FACILITY (ACCEL,1USALAS) 2.5-MeV electrostatic accelerator 12331001 11 INC-SOURCE (P-LI7) 30 keV neutrons 12331001 12 (P-T) 60 - 1000 keV neutrons 12331001 13 DETECTOR (STANK) Cd loaded large liquid scintillator (1 m diam.)12331001 14 METHOD (COINC) Coincidence between scintillator (delayed signa12331001 15 due to capture of fission neutrons after 12331001 16 thermalization), fission counter and beam pulse for 12331001 17 fission event identification 12331001 18 CORRECTION Extrapolation of pulse height distribution to zero 12331001 19 energy (1.035+/-0.035) 12331001 20 HISTORY (19760804T) Translated from SCISRS 12331001 21 (19841005A) Converted to reaction formalism 12331001 22 (20170807A) BP: Updated to new date formats,lower 12331001 23 case. Corrections according last EXFOR rules and 12331001 24 Dict., added Vienna reactor physics reference, 12331001 25 updated BIB information. 12331001 26 (20230706A) OS. Superseded sub.6, added sub.8 12331001 27 (20231017A) On. Major alterations in 002-008. 12331001 28 ENDBIB 26 0 12331001 29 NOCOMMON 0 0 12331001 30 ENDSUBENT 29 0 1233100199999 SUBENT 12331002 20231017 150912331002 1 BIB 6 11 12331002 2 REACTION (92-U-233(N,ABS),,ALF) 12331002 3 SAMPLE U3O8 pellets packed into Al cans (0.75 in diam., 12331002 4 0.053 in depth, 0.002 in thick Al). 12331002 5 Contaminated with about 1 part in 10**9 of 232U. 12331002 6 DETECTOR (FISCH) 4 surfaces, each coated with about 1 mg/cm2 of 12331002 7 233U 12331002 8 ERR-ANALYS (DATA-ERR) standard deviation due to counting statistic12331002 9 and zero energy extrapolation 12331002 10 STATUS (TABLE,,J.C.Hopkins+,J,NSE,12,169,1962) Table I 12331002 11 HISTORY (20170807A) BP: Updated description and error analysis.12331002 12 (20231017A) On. EN-RSL -> EN-RSL-HW. 12331002 13 ENDBIB 11 0 12331002 14 NOCOMMON 0 0 12331002 15 DATA 4 9 12331002 16 EN EN-RSL-HW DATA DATA-ERR 12331002 17 KEV KEV NO-DIM NO-DIM 12331002 18 30. 10. 0.109 0.022 12331002 19 60. 15. 0.110 0.025 12331002 20 175. 25. 0.098 0.020 12331002 21 250. 50. 0.091 0.022 12331002 22 400. 90. 0.078 0.010 12331002 23 600. 76. 0.062 0.009 12331002 24 750. 70. 0.047 0.009 12331002 25 900. 63. 0.050 0.008 12331002 26 1000. 58. 0.030 0.008 12331002 27 ENDDATA 11 0 12331002 28 ENDSUBENT 27 0 1233100299999 SUBENT 12331003 20231017 150912331003 1 BIB 6 9 12331003 2 REACTION (92-U-233(N,G)92-U-234,,SIG) 12331003 3 MONITOR (92-U-233(N,F),,SIG) 12331003 4 MONIT-REF (,D.J.Hughes+,R,BNL-325,1957) Suppl. 1 12331003 5 ERR-ANALYS (DATA-ERR) standard deviation in alpha and fission 12331003 6 cross section 12331003 7 STATUS (TABLE,,J.C.Hopkins+,J,NSE,12,169,1962) Table II 12331003 8 (DEP,12331002) alpha values 12331003 9 HISTORY (20170807A) BP: Updated description and error analysis.12331003 10 (20231017A) On. EN-RSL-HW values added. 12331003 11 ENDBIB 9 0 12331003 12 NOCOMMON 0 0 12331003 13 DATA 4 9 12331003 14 EN EN-RSL-HW DATA DATA-ERR 12331003 15 KEV KEV B B 12331003 16 30. 10. 0.425 0.092 12331003 17 60. 15. 0.331 0.079 12331003 18 175. 25. 0.236 0.051 12331003 19 250. 50. 0.214 0.054 12331003 20 400. 90. 0.176 0.027 12331003 21 600. 76. 0.124 0.020 12331003 22 750. 70. 0.093 0.019 12331003 23 900. 63. 0.097 0.017 12331003 24 1000. 58. 0.058 0.016 12331003 25 ENDDATA 11 0 12331003 26 ENDSUBENT 25 0 1233100399999 SUBENT 12331004 20231017 150912331004 1 BIB 6 9 12331004 2 REACTION (92-U-235(N,G)92-U-236,,SIG) 12331004 3 MONITOR (92-U-235(N,F),,SIG) 12331004 4 MONIT-REF (,D.J.Hughes+,R,BNL-325,1957) Suppl. 1 12331004 5 ERR-ANALYS (DATA-ERR) standard deviation in alpha and fission 12331004 6 cross section 12331004 7 STATUS (TABLE,,J.C.Hopkins+,J,NSE,12,169,1962) Table II 12331004 8 (DEP,12331005) alpha values 12331004 9 HISTORY (20170807A) BP: Updated description and error analysis.12331004 10 (20231017A) On. EN-RSL-HW values added. 12331004 11 ENDBIB 9 0 12331004 12 NOCOMMON 0 0 12331004 13 DATA 4 9 12331004 14 EN EN-RSL-HW DATA DATA-ERR 12331004 15 KEV KEV B B 12331004 16 30. 10. 1.031 0.129 12331004 17 60. 15. 0.703 0.076 12331004 18 175. 25. 0.347 0.038 12331004 19 250. 50. 0.301 0.033 12331004 20 400. 90. 0.198 0.021 12331004 21 600. 76. 0.172 0.019 12331004 22 750. 70. 0.150 0.017 12331004 23 900. 63. 0.128 0.017 12331004 24 1000. 58. 0.109 0.011 12331004 25 ENDDATA 11 0 12331004 26 ENDSUBENT 25 0 1233100499999 SUBENT 12331005 20231017 150912331005 1 BIB 6 12 12331005 2 REACTION (92-U-235(N,ABS),,ALF) 12331005 3 SAMPLE (92-U-235,ENR=0.93) 12331005 4 Consists of 40 discs of 235U, each 0.77 in. in diam., 12331005 5 0.005 in. thick (9.5 g/cm2 total), and spaced 12331005 6 0.12 in. apart in a light Al frame 12331005 7 DETECTOR (FISCH) 36 surfaces, each coated with about 1.2 mg/cm2 12331005 8 of 235U 12331005 9 ERR-ANALYS (DATA-ERR) standard deviation due to counting statistic12331005 10 and zero energy extrapolation 12331005 11 STATUS (TABLE,,J.C.Hopkins+,J,NSE,12,169,1962) Table I 12331005 12 HISTORY (20170807A) BP: Updated description and error analysis.12331005 13 (20231017A) On. EN-RSL -> EN-RSL-HW. 12331005 14 ENDBIB 12 0 12331005 15 NOCOMMON 0 0 12331005 16 DATA 4 9 12331005 17 EN EN-RSL-HW DATA DATA-ERR 12331005 18 KEV KEV NO-DIM NO-DIM 12331005 19 30. 10. 0.376 0.036 12331005 20 60. 15. 0.327 0.024 12331005 21 175. 25. 0.224 0.017 12331005 22 250. 50. 0.213 0.016 12331005 23 400. 90. 0.152 0.011 12331005 24 600. 76. 0.143 0.011 12331005 25 750. 70. 0.128 0.010 12331005 26 900. 63. 0.101 0.011 12331005 27 1000. 58. 0.087 0.008 12331005 28 ENDDATA 11 0 12331005 29 ENDSUBENT 28 0 1233100599999 SUBENT 12331006 20231017 150912331006 1 BIB 6 12 12331006 2 REACTION (94-PU-239(N,G)94-PU-240,,SIG) 12331006 3 MONITOR (94-PU-239(N,F),,SIG) 12331006 4 MONIT-REF (,D.J.Hughes+,R,BNL-325,1957) Suppl. 1 12331006 5 ERR-ANALYS (DATA-ERR) standard deviation in alpha and fission 12331006 6 cross section 12331006 7 STATUS (TABLE,,J.C.Hopkins+,J,NSE,12,169,1962) Table II 12331006 8 (DEP,12331007) alpha values 12331006 9 (SPSDD,12331008) Renormalized with a newer 239Pu(n,f) 12331006 10 cross section 12331006 11 HISTORY (20170807A) BP: Updated description and error analysis.12331006 12 (20230706A) Status SPSDD added 12331006 13 (20231017A) On. EN-RSL-HW values added. 12331006 14 ENDBIB 12 0 12331006 15 NOCOMMON 0 0 12331006 16 DATA 4 9 12331006 17 EN EN-RSL-HW DATA DATA-ERR 12331006 18 KEV KEV B B 12331006 19 30. 10. 0.760 0.104 12331006 20 60. 15. 0.273 0.039 12331006 21 175. 25. 0.241 0.044 12331006 22 250. 50. 0.177 0.030 12331006 23 400. 90. 0.138 0.024 12331006 24 600. 76. 0.108 0.017 12331006 25 750. 70. 0.077 0.018 12331006 26 900. 63. 0.061 0.021 12331006 27 1000. 58. 0.048 0.013 12331006 28 ENDDATA 11 0 12331006 29 ENDSUBENT 28 0 1233100699999 SUBENT 12331007 20231017 150912331007 1 BIB 6 10 12331007 2 REACTION (94-PU-239(N,ABS),,ALF) 12331007 3 SAMPLE Consists of 22 discs of a 239PuAl alloy (3% Al by 12331007 4 weight), each 0.75 in. in diameter, 0.005 in. thick 12331007 5 DETECTOR (FISCH) 9 surfaces each coated with about 1 mg/cm2 of 12331007 6 239Pu 12331007 7 ERR-ANALYS (DATA-ERR) standard deviation due to counting statistic12331007 8 and zero energy extrapolation 12331007 9 STATUS (TABLE,,J.C.Hopkins+,J,NSE,12,169,1962) Table I 12331007 10 HISTORY (20170807A) BP: Updated description and error analysis.12331007 11 (20231017A) On. EN-RSL -> EN-RSL-HW. 12331007 12 ENDBIB 10 0 12331007 13 NOCOMMON 0 0 12331007 14 DATA 4 9 12331007 15 EN EN-RSL-HW DATA DATA-ERR 12331007 16 KEV KEV NO-DIM NO-DIM 12331007 17 30. 10. 0.343 0.038 12331007 18 60. 15. 0.145 0.017 12331007 19 175. 25. 0.142 0.023 12331007 20 250. 50. 0.106 0.016 12331007 21 400. 90. 0.089 0.009 12331007 22 600. 76. 0.065 0.009 12331007 23 750. 70. 0.046 0.010 12331007 24 900. 63. 0.035 0.012 12331007 25 1000. 58. 0.027 0.007 12331007 26 ENDDATA 11 0 12331007 27 ENDSUBENT 26 0 1233100799999 SUBENT 12331008 20231017 150912331008 1 BIB 6 12 12331008 2 REACTION (94-PU-239(N,G)94-PU-240,,SIG) 12331008 3 MONITOR (94-PU-239(N,F),,SIG) Updated standard values 12331008 4 ANALYSIS Revised values obtained by alpha values in 12331.007 12331008 5 multiplied by the 239Pu(n,f) INDEN evaluations cross 12331008 6 sections by Robert Capote and approved by John Hopkins12331008 7 on 17 October 2022. 12331008 8 ERR-ANALYS (DATA-ERR) Uncertainty in alpha and 239Pu(n,f) standard12331008 9 STATUS (TABLE) Data received from R.Capote, Oct.2022. 12331008 10 (RNORM,12331006) 12331008 11 HISTORY (20221017R) On. Received from Roberto Capote. 12331008 12 (20230706C) 12331008 13 (20231018A) On. ERR-ANALYS added. 12331008 14 ENDBIB 12 0 12331008 15 NOCOMMON 0 0 12331008 16 DATA 3 9 12331008 17 EN DATA DATA-ERR 12331008 18 MEV B B 12331008 19 3.0E-02 5.59E-01 6.2E-02 12331008 20 6.0E-02 2.25E-01 2.7E-02 12331008 21 1.75E-01 2.12E-01 3.4E-02 12331008 22 2.50E-01 1.59E-01 2.4E-02 12331008 23 4.00E-01 1.38E-01 1.4E-02 12331008 24 6.00E-01 1.04E-01 1.4E-02 12331008 25 7.50E-01 7.8E-02 1.7E-02 12331008 26 9.00E-01 5.9E-02 2.0E-02 12331008 27 1.000 4.7E-02 1.2E-02 12331008 28 ENDDATA 11 0 12331008 29 ENDSUBENT 28 0 1233100899999 ENDENTRY 8 0 1233199999999