ENTRY 40636 20230228 421240636 0 1 SUBENT 40636001 20230228 421240636 1 1 BIB 6 16 40636 1 2 TITLE Fission cross sections for Th230, Pu240, Pu241, and 40636 1 3 Am241 by neutrons with energies of 2.5 and 14.6 MeV 40636 1 4 AUTHOR (M.I.Kazarinova,Yu.S.Zamyatin,V.M.Gorbachev) 40636 1 5 There is an misprint in SJA,8,125,1961 : 40636 1 6 Yu.S.Zamyatin -> Yu.S.ZamyatNin (right, as in AE,8,139)40636 1 7 REFERENCE (J,SJA,8,125,1961) Engl.translation of AE,8,139,1960 40636 1 8 (J,AE,8,139,1960) Issue 2. 40636 1 9 INSTITUTE (4RUSKUR) 40636 1 10 STATUS (TABLE) Table 2 of SJA,8,125,1961 40636 1 11 HISTORY (19831005C) Compiled at the centre 40636 1 12 (19880921U) One author name (Zamyatnin) and MONITOR 40636 1 13 headings in SAN 002, 004, 006, 008 changed 40636 1 14 (19911016U) MONITOR codes in SAN 002, 004, 006, 008 40636 1 15 corrected. Sample content is given 40636 1 16 (20230228A) Update for current rules and dictionaries. 40636 1 17 Decay data (used in weight determination) were added. 40636 1 18 ENDBIB 16 0 40636 1 19 NOCOMMON 0 0 40636 1 20 ENDSUBENT 19 0 40636 199999 SUBENT 40636002 20230228 421240636 2 1 BIB 9 22 40636 2 2 REACTION (90-TH-230(N,F),,SIG) 40636 2 3 INC-SOURCE (D-D) 40636 2 4 (D-T) 40636 2 5 DECAY-DATA (90-TH-230,8.E+4YR,A) 40636 2 6 SAMPLE Th-230 effective weight is 1870+-40 microgram, 40636 2 7 Th-230 content is 35+-1 % , Th-232 content 65+-1 % . 40636 2 8 DETECTOR (FISCH) Double fission chamber 40636 2 9 (LONGC) For 2.5-MeV neutron flux monitoring 40636 2 10 MONITOR ((MONIT)90-TH-232(N,F),,SIG) 40636 2 11 0.13 b at 2.5 MeV, 0.34 b at 14.6 MeV 40636 2 12 ANALYSIS Measured values by two ways were the same in the 40636 2 13 range of uncertainties : 40636 2 14 1. relative to Th-232 at 2.5 keV, 40636 2 15 2. relative known cross section at 14.6 MeV, using 40636 2 16 ratio isotope/monitor for 2.5 and 14.6 MeV and 40636 2 17 Th-232 cross sections 0.13 and 0.34 b at 2.5 and 14.6 40636 2 18 MeV, respectively. 40636 2 19 ERR-ANALYS (DATA-ERR) Most probably total error 40636 2 20 HISTORY (19911016U) Th-230 in monitor code corrected to Th-232 40636 2 21 (20230228A) MONIT 0.34 b and EN-NRM 14.6 MeV were 40636 2 22 deleted from COMMON block according to a comment of 40636 2 23 N.Otsuka (NDS,IAEA). 40636 2 24 ENDBIB 22 0 40636 2 25 NOCOMMON 0 0 40636 2 26 DATA 4 1 40636 2 27 EN DATA DATA-ERR MONIT 40636 2 28 MEV B B B 40636 2 29 2.5 0.41 0.08 0.13 40636 2 30 ENDDATA 3 0 40636 2 31 ENDSUBENT 30 0 40636 299999 SUBENT 40636003 20230228 421240636 3 1 BIB 8 11 40636 3 2 REACTION (90-TH-230(N,F),,SIG) 40636 3 3 DECAY-DATA (90-TH-230,8.E+4YR,A) 40636 3 4 DETECTOR (FISCH) 40636 3 5 SAMPLE Th-230 effective weight is 1870+-40 microgram, 40636 3 6 Th-230 content is 35+-1 % , Th-232 content 65+-1 % . 40636 3 7 INC-SOURCE (D-T) 40636 3 8 METHOD (ASSOP) For neutron flux measurement of alpha-particles40636 3 9 from T(d,n)He4 reaction 40636 3 10 MONITOR Absolute measurements 40636 3 11 ERR-ANALYS (ERR-T) Most probably total error 40636 3 12 (ERR-S,2.,3.) Statistical accuracy 2-3 %. 40636 3 13 ENDBIB 11 0 40636 3 14 NOCOMMON 0 0 40636 3 15 DATA 3 1 40636 3 16 EN DATA ERR-T 40636 3 17 MEV B B 40636 3 18 14.6 0.72 0.15 40636 3 19 ENDDATA 3 0 40636 3 20 ENDSUBENT 19 0 40636 399999 SUBENT 40636004 20230228 421240636 4 1 BIB 10 23 40636 4 2 REACTION (94-PU-240(N,F),,SIG) 40636 4 3 INC-SOURCE (D-D) 40636 4 4 (D-T) 40636 4 5 DECAY-DATA (94-PU-240,6.6E+3YR,A) 40636 4 6 94-PU-240,1.2E+11,SF 40636 4 7 SAMPLE Pu-240 effective weight is 345+-15 microgram, 40636 4 8 Pu-240 content is 85 % , Pu-239 content is 15 % . 40636 4 9 DETECTOR (FISCH) Double fission chamber 40636 4 10 (LONGC) For 2.5-MeV neutron flux monitoring 40636 4 11 MONITOR ((MONIT)92-U-238(N,F),,SIG) 40636 4 12 0.58 b at 2.5 MeV, 1.1 b at 14.6 MeV. 40636 4 13 ANALYSIS Measured values by two ways were the same in the 40636 4 14 range of uncertainties : 40636 4 15 1. relative to U-238 at 2.5 keV, 40636 4 16 2. relative known cross section at 14.6 MeV, using 40636 4 17 ratio isotope/monitor for 2.5 and 14.6 MeV and 40636 4 18 U-238 cross sections 0.58 and 1.1 b at 2.5 and 14.6 40636 4 19 MeV, respectively. 40636 4 20 ERR-ANALYS (DATA-ERR) Most probably total error 40636 4 21 REL-REF (A,41675004,V.G.Nesterov+,J,ZET,35,532,1958) 40636 4 22 HISTORY (20230228A) MONIT 1.1 b and EN-NRM 14.6 MeV were 40636 4 23 deleted from COMMON block according to a comment of 40636 4 24 N.Otsuka (NDS,IAEA). 40636 4 25 ENDBIB 23 0 40636 4 26 NOCOMMON 0 0 40636 4 27 DATA 4 1 40636 4 28 EN DATA DATA-ERR MONIT 40636 4 29 MEV B B B 40636 4 30 2.5 1.6 0.3 0.58 40636 4 31 ENDDATA 3 0 40636 4 32 ENDSUBENT 31 0 40636 499999 SUBENT 40636005 20230228 421240636 5 1 BIB 9 14 40636 5 2 REACTION (94-PU-240(N,F),,SIG) 40636 5 3 DECAY-DATA (94-PU-240,6.6E+3YR,A) 40636 5 4 94-PU-240,1.2E+11,SF 40636 5 5 SAMPLE Pu-240 effective weight is 345+-15 microgram, 40636 5 6 Pu-240 content is 85 % , Pu-239 content is 15 % . 40636 5 7 DETECTOR (LONGC) For neutron flux monitoring 40636 5 8 (FISCH) 40636 5 9 INC-SOURCE (D-T) 40636 5 10 METHOD (ASSOP) For neutron flux measurement of alpha-particles40636 5 11 from T(d,n)He4 reaction 40636 5 12 MONITOR Absolute measurements 40636 5 13 ERR-ANALYS (ERR-T) Most probably total error 40636 5 14 (ERR-S,2.,3.) Statistical accuracy 2-3 %. 40636 5 15 REL-REF (A,41675003,V.G.Nesterov+,J,ZET,35,532,1958) 40636 5 16 ENDBIB 14 0 40636 5 17 NOCOMMON 0 0 40636 5 18 DATA 3 1 40636 5 19 EN DATA ERR-T 40636 5 20 MEV B B 40636 5 21 14.6 2.4 0.3 40636 5 22 ENDDATA 3 0 40636 5 23 ENDSUBENT 22 0 40636 599999 SUBENT 40636006 20230228 421240636 6 1 BIB 9 21 40636 6 2 REACTION (94-PU-241(N,F),,SIG) 40636 6 3 INC-SOURCE (D-D) 40636 6 4 (D-T) 40636 6 5 DECAY-DATA (94-PU-241,13.2YR) 40636 6 6 SAMPLE Pu-241 effective weight is 50.6+-1.6 microgram, 40636 6 7 Pu-241 content is 88 % , Am-241 content - 12 % . 40636 6 8 DETECTOR (FISCH) Double fission chamber 40636 6 9 (LONGC) For 2.5-MeV neutron flux monitoring 40636 6 10 MONITOR ((MONIT)92-U-238(N,F),,SIG) 40636 6 11 0.58 b at 2.5 MeV, 1.1 b at 14.6 MeV. 40636 6 12 ANALYSIS Measured values by two ways were the same in the 40636 6 13 range of uncertainties : 40636 6 14 1. relative to U-238 at 2.5 keV, 40636 6 15 2. relative known cross section at 14.6 MeV, using 40636 6 16 ratio isotope/monitor for 2.5 and 14.6 MeV and 40636 6 17 U-238 cross sections 0.58 and 1.1 b at 2.5 and 14.6 40636 6 18 MeV, respectively. 40636 6 19 ERR-ANALYS (DATA-ERR) Most probably total error 40636 6 20 HISTORY (20230228A) MONIT 1.1 b and EN-NRM 14.6 MeV were 40636 6 21 deleted from COMMON block according to a comment of 40636 6 22 N.Otsuka (NDS,IAEA). 40636 6 23 ENDBIB 21 0 40636 6 24 NOCOMMON 0 0 40636 6 25 DATA 4 1 40636 6 26 EN DATA DATA-ERR MONIT 40636 6 27 MEV B B B 40636 6 28 2.5 1.2 0.2 0.58 40636 6 29 ENDDATA 3 0 40636 6 30 ENDSUBENT 29 0 40636 699999 SUBENT 40636007 20230228 421240636 7 1 BIB 9 17 40636 7 2 REACTION (94-PU-241(N,F),,SIG) 40636 7 3 DECAY-DATA (94-PU-241,13.2YR) 40636 7 4 Alpha particles from Am-241 after Pu-241 B- decay. 40636 7 5 DETECTOR (LONGC) For neutron flux monitoring 40636 7 6 (FISCH) Fission chamber 40636 7 7 SAMPLE Pu-241 effective weight is 50.6+-1.6 microgram, 40636 7 8 Pu-241 content is 88 % , Am-241 content - 12 % . 40636 7 9 ASSUMED (ASSUM,94-PU-241(N,F),,SIG) at thermal energy. 40636 7 10 Pu-241 layer was also "weighted" in a thermal neutron 40636 7 11 flux by using the Pu-241 thermal neutron cross section40636 7 12 of 1025 +-10 b. 40636 7 13 INC-SOURCE (D-T) 40636 7 14 METHOD (ASSOP) For neutron flux measurement of alpha-particles40636 7 15 from T(d,n)He4 reaction 40636 7 16 MONITOR Absolute measurements 40636 7 17 ERR-ANALYS (ERR-T) Most probably total error 40636 7 18 (ERR-S,2.,3.) Statistical accuracy 2-3 %. 40636 7 19 ENDBIB 17 0 40636 7 20 COMMON 2 3 40636 7 21 ASSUM ASSUM-ERR 40636 7 22 B B 40636 7 23 1025. 10. 40636 7 24 ENDCOMMON 3 0 40636 7 25 DATA 3 1 40636 7 26 EN DATA ERR-T 40636 7 27 MEV B B 40636 7 28 14.6 2.05 0.1 40636 7 29 ENDDATA 3 0 40636 7 30 ENDSUBENT 29 0 40636 799999 SUBENT 40636008 20230228 421240636 8 1 BIB 10 24 40636 8 2 REACTION (95-AM-241(N,F),,SIG) 40636 8 3 INC-SOURCE (D-D) 40636 8 4 (D-T) 40636 8 5 DECAY-DATA (95-AM-241,458.YR,A) 40636 8 6 SAMPLE Am-241 effective weight is 89+-2 microgram, 40636 8 7 Am-241 content is 100 % . 40636 8 8 DETECTOR (FISCH) Double fission chamber 40636 8 9 (LONGC) For 2.5-MeV neutron flux monitoring 40636 8 10 MONITOR ((MONIT)92-U-238(N,F),,SIG) 40636 8 11 0.58 b at 2.5 MeV, 1.1 b at 14.6 MeV. 40636 8 12 ANALYSIS Measured values by two ways were the same in the 40636 8 13 range of uncertainties : 40636 8 14 1. relative to U-238 at 2.5 keV, 40636 8 15 2. relative known cross section at 14.6 MeV, using 40636 8 16 ratio isotope/monitor for 2.5 and 14.6 MeV and 40636 8 17 U-238 cross sections 0.58 and 1.1 b at 2.5 and 14.6 40636 8 18 MeV, respectively. 40636 8 19 ERR-ANALYS (DATA-ERR) Most probably total error 40636 8 20 COMMENT Measured data are compared with 1.35 b value from 40636 8 21 D.Hughes,R.Schwartz, Neutron Cross Sections, New York, 40636 8 22 BNL,1958. 40636 8 23 HISTORY (20230228A) MONIT 1.1 b and EN-NRM 14.6 MeV were 40636 8 24 deleted from COMMON block according to a comment of 40636 8 25 N.Otsuka (NDS,IAEA). 40636 8 26 ENDBIB 24 0 40636 8 27 NOCOMMON 0 0 40636 8 28 DATA 4 1 40636 8 29 EN DATA DATA-ERR MONIT 40636 8 30 MEV B B B 40636 8 31 2.5 1.95 0.2 0.58 40636 8 32 ENDDATA 3 0 40636 8 33 ENDSUBENT 32 0 40636 899999 SUBENT 40636009 20230228 421240636 9 1 BIB 9 13 40636 9 2 REACTION (95-AM-241(N,F),,SIG) 40636 9 3 DECAY-DATA (95-AM-241,458.YR,A) 40636 9 4 SAMPLE Am-241 effective weight is 89+-2 microgram, 40636 9 5 Am-241 content is 100 % . 40636 9 6 DETECTOR (LONGC) For neutron flux monitoring 40636 9 7 (FISCH) 40636 9 8 INC-SOURCE (D-T) 40636 9 9 METHOD (ASSOP) For neutron flux measurement of alpha-particles40636 9 10 from T(d,n)He4 reaction 40636 9 11 MONITOR Absolute measurements 40636 9 12 ERR-ANALYS (ERR-T) Most probably total error 40636 9 13 (ERR-S,2.,3.) Statistical accuracy 2-3 %. 40636 9 14 REL-REF (D,40443002,A.N.Protopopov+,J,AE,6,67,1959) Issue 1. 40636 9 15 ENDBIB 13 0 40636 9 16 COMMON 1 3 40636 9 17 HL-ERR 40636 9 18 YR 40636 9 19 0.5 40636 9 20 ENDCOMMON 3 0 40636 9 21 DATA 3 1 40636 9 22 EN DATA ERR-T 40636 9 23 MEV B B 40636 9 24 14.6 2.95 0.15 40636 9 25 ENDDATA 3 0 40636 9 26 ENDSUBENT 25 0 40636 999999 ENDENTRY 9 0 4063699999999