ENTRY 23251 20190101 22732325100000001 SUBENT 23251001 20190101 22732325100100001 BIB 13 43 2325100100002 TITLE Difference of microscopic integral cross-section 2325100100003 ratios in the 235U and 239Pu thermal fission neutron 2325100100004 spectra 2325100100005 AUTHOR (A.Fabry) 2325100100006 INSTITUTE (2BLGMOL) 2325100100007 REFERENCE (C,71VIENNA,,97,1971) 2325100100008 FACILITY (REAC,2BLGMOL) BR1 2325100100009 INC-SOURCE (REAC,THCOL) Horizontal graphite thermal column. 2325100100010 The thermal neutron flux is ~3.5E+08 n/cm2/s at 2325100100011 reactor power level of 400 kW. 2325100100012 The thermal neutron field is perfectly well 2325100100013 thermalized. 2325100100014 235U (93% enriched) and 239Pu (94% enriched) disc 2325100100015 shape (0.1 mm thick and 19 mm diam.) fission sources. 2325100100016 INC-SPECT Ratio in Numerator: 239Pu(n-th,f) neutron field, 2325100100017 Ratio in denominator: 235U(n-th,f)neutron field. 2325100100018 SAMPLE Stack sandwiched by two fission source discs in the 2325100100019 following order: 2325100100020 Fission source 2325100100021 Cd (<1 mm) 2325100100022 In (0.13 mm) 2325100100023 Rh (0.1 mm) 2325100100024 Al (0.5 mm) 2325100100025 Rh (0.1 mm) 2325100100026 Al (0.5 mm) 2325100100027 Rh (0.1 mm) 2325100100028 In (0.13 mm) 2325100100029 Cd (<1 mm) 2325100100030 Fission source 2325100100031 into a Cd box coaxial with the fission sources. 2325100100032 METHOD (ACTIV) Four 3-hours irradiations for each fission 2325100100033 CORRECTION Corrected for 2325100100034 - dead-time losses, 2325100100035 - decay during counting. 2325100100036 ERR-ANALYS (ERR-S) Statistical errors of the individual 2325100100037 measurements propagated quadratically to the final 2325100100038 errors 2325100100039 COMMENT By compiler (2014-06-28): 2325100100040 kT=1.32 MeV for 235U(n-th,f) fission neutrons, and 2325100100041 kT=1.4 MeV for 239Pu(n-th,f) fission neutrons 2325100100042 assumed. 2325100100043 HISTORY (20140628C) On 2325100100044 (20190101U) SD: Ref corrected according MEMO CP-D/968. 2325100100045 ENDBIB 43 0 2325100100046 NOCOMMON 0 0 2325100100047 ENDSUBENT 46 0 2325100199999 SUBENT 23251002 20140618 22402325100200001 BIB 5 12 2325100200002 REACTION (((13-AL-27(N,P)12-MG-27,,SIG,,FIS)/ 2325100200003 (49-IN-115(N,INL)49-IN-115-M,,SIG,,FIS))// 2325100200004 ((13-AL-27(N,P)12-MG-27,,SIG,,FIS)/ 2325100200005 (49-IN-115(N,INL)49-IN-115-M,,SIG,,FIS))) 2325100200006 Double ratio for 27Al(n,p)27Mg/115In(n,n')115mIn 2325100200007 DECAY-DATA1(12-MG-27,9.46MIN,DG) 2325100200008 2(49-IN-115-M,4.5HR,DG,335.) 2325100200009 RAD-DET 1(12-MG-27,DG) 2325100200010 2(49-IN-115-M,DG) 2325100200011 DETECTOR (NAICR) 3 in x 3 in NaI(Tl) spectrometer 2325100200012 STATUS (TABLE) Table IV of IAEA report STI/PUB-329,p97 (1971) 2325100200013 (COREL,23251003) Result with beta-counting for 27Mg 2325100200014 ENDBIB 12 0 2325100200015 NOCOMMON 0 0 2325100200016 DATA 4 1 2325100200017 KT-DUM-NM KT-DUM-DN DATA ERR-S 2325100200018 MEV MEV NO-DIM NO-DIM 2325100200019 1.4 1.32 1.08 0.05 2325100200020 ENDDATA 3 0 2325100200021 ENDSUBENT 20 0 2325100299999 SUBENT 23251003 20140618 22402325100300001 BIB 5 13 2325100300002 REACTION (((13-AL-27(N,P)12-MG-27,,SIG,,FIS)/ 2325100300003 (49-IN-115(N,INL)49-IN-115-M,,SIG,,FIS))// 2325100300004 ((13-AL-27(N,P)12-MG-27,,SIG,,FIS)/ 2325100300005 (49-IN-115(N,INL)49-IN-115-M,,SIG,,FIS))) 2325100300006 Double ratio for 27Al(n,p)27Mg/115In(n,n')115mIn 2325100300007 DECAY-DATA1(12-MG-27,9.46MIN,B) 2325100300008 2(49-IN-115-M,4.5HR,DG,335.) 2325100300009 RAD-DET 1(12-MG-27,B) 2325100300010 2(49-IN-115-M,DG) 2325100300011 DETECTOR 1(SCIN) Plastifluor beta-counter 2325100300012 2(NAICR) 3 in x 3 in NaI(Tl) spectrometer 2325100300013 STATUS (TABLE) Table IV of IAEA report STI/PUB-329,p97 (1971) 2325100300014 (COREL,23251002) Result with gamma-counting for 27Mg 2325100300015 ENDBIB 13 0 2325100300016 NOCOMMON 0 0 2325100300017 DATA 4 1 2325100300018 KT-DUM-NM KT-DUM-DN DATA ERR-S 2325100300019 MEV MEV NO-DIM NO-DIM 2325100300020 1.4 1.32 1.10 0.03 2325100300021 ENDDATA 3 0 2325100300022 ENDSUBENT 21 0 2325100399999 SUBENT 23251004 20140618 22402325100400001 BIB 3 9 2325100400002 REACTION (((13-AL-27(N,P)12-MG-27,,SIG,,FIS,DERIV)/ 2325100400003 (49-IN-115(N,INL)49-IN-115-M,,SIG,,FIS,DERIV))// 2325100400004 ((13-AL-27(N,P)12-MG-27,,SIG,,FIS,DERIV)/ 2325100400005 (49-IN-115(N,INL)49-IN-115-M,,SIG,,FIS,DERIV))) 2325100400006 Double ratio for 27Al(n,p)27Mg/115In(n,n')115mIn 2325100400007 ANALYSIS Weighted average of two double ratios 2325100400008 STATUS (TABLE) Table IV of IAEA report STI/PUB-329,p97 (1971) 2325100400009 (DEP,23251002) Double ratio with gamma-count for 27Mg 2325100400010 (DEP,23251003) Double ratio with beta-count for 27Mg 2325100400011 ENDBIB 9 0 2325100400012 NOCOMMON 0 0 2325100400013 DATA 4 1 2325100400014 KT-DUM-NM KT-DUM-DN DATA ERR-S 2325100400015 MEV MEV NO-DIM NO-DIM 2325100400016 1.4 1.32 1.09 0.02 2325100400017 ENDDATA 3 0 2325100400018 ENDSUBENT 17 0 2325100499999 SUBENT 23251005 20140618 22402325100500001 BIB 6 13 2325100500002 REACTION (((13-AL-27(N,A)11-NA-24,,SIG,,FIS)/ 2325100500003 (49-IN-115(N,INL)49-IN-115-M,,SIG,,FIS))// 2325100500004 ((13-AL-27(N,A)11-NA-24,,SIG,,FIS)/ 2325100500005 (49-IN-115(N,INL)49-IN-115-M,,SIG,,FIS))) 2325100500006 Double ratio for 27Al(n,a)24Na/115In(n,n')115mIn 2325100500007 DECAY-DATA1(11-NA-24,15.0HR,B) 2325100500008 2(49-IN-115-M,4.5HR,DG,335.) 2325100500009 RAD-DET 1(11-NA-24,B) 2325100500010 2(49-IN-115-M,DG) 2325100500011 DETECTOR 1(SCIN) Plastifluor beta-counter 2325100500012 2(NAICR) 3 in x 3 in NaI(Tl) spectrometer 2325100500013 ANALYSIS Mean of four irradiations 2325100500014 STATUS (TABLE) Table IV of IAEA report STI/PUB-329,p97 (1971) 2325100500015 ENDBIB 13 0 2325100500016 NOCOMMON 0 0 2325100500017 DATA 4 1 2325100500018 KT-DUM-NM KT-DUM-DN DATA ERR-S 2325100500019 MEV MEV NO-DIM NO-DIM 2325100500020 1.4 1.32 1.17 0.04 2325100500021 ENDDATA 3 0 2325100500022 ENDSUBENT 21 0 2325100599999 SUBENT 23251006 20140618 22402325100600001 BIB 5 11 2325100600002 REACTION (((13-AL-27(N,A)11-NA-24,,SIG,,FIS)/ 2325100600003 (13-AL-27(N,P)12-MG-27,,SIG,,FIS))// 2325100600004 ((13-AL-27(N,A)11-NA-24,,SIG,,FIS)/ 2325100600005 (13-AL-27(N,P)12-MG-27,,SIG,,FIS))) 2325100600006 Double ratio for 27Al(n,a)24Na/27Al(n,p)27Mg 2325100600007 DECAY-DATA1(11-NA-24,15.0HR,B) 2325100600008 2(12-MG-27,9.46MIN,B) 2325100600009 RAD-DET 1(11-NA-24,B) 2325100600010 2(12-MG-27,B) 2325100600011 DETECTOR (SCIN) Plastifluor beta-counter 2325100600012 STATUS (TABLE) Table IV of IAEA report STI/PUB-329,p97 (1971) 2325100600013 ENDBIB 11 0 2325100600014 NOCOMMON 0 0 2325100600015 DATA 4 1 2325100600016 KT-DUM-NM KT-DUM-DN DATA ERR-S 2325100600017 MEV MEV NO-DIM NO-DIM 2325100600018 1.4 1.32 1.060 0.026 2325100600019 ENDDATA 3 0 2325100600020 ENDSUBENT 19 0 2325100699999 SUBENT 23251007 20140618 22402325100700001 BIB 5 12 2325100700002 REACTION (((13-AL-27(N,A)11-NA-24,,SIG,,FIS)/ 2325100700003 (45-RH-103(N,INL)45-RH-103-M,,SIG,,FIS))// 2325100700004 ((13-AL-27(N,A)11-NA-24,,SIG,,FIS)/ 2325100700005 (45-RH-103(N,INL)45-RH-103-M,,SIG,,FIS))) 2325100700006 Double ratio for 27Al(n,a)24Na/103Rh(n,n')103mRh 2325100700007 DECAY-DATA1(11-NA-24,15.0HR,B) 2325100700008 2(45-RH-103-M,57.MIN,XR) 2325100700009 RAD-DET 1(11-NA-24,B) 2325100700010 2(45-RH-103-M,XR) K X-ray 2325100700011 DETECTOR 1(SCIN) Plastifluor beta-counter 2325100700012 2(NAICR) 2 in diam. x 2 mm thick Nai(Tl) spectrometer 2325100700013 STATUS (TABLE) Table IV of IAEA report STI/PUB-329,p97 (1971) 2325100700014 ENDBIB 12 0 2325100700015 NOCOMMON 0 0 2325100700016 DATA 4 1 2325100700017 KT-DUM-NM KT-DUM-DN DATA ERR-S 2325100700018 MEV MEV NO-DIM NO-DIM 2325100700019 1.4 1.32 1.11 0.05 2325100700020 ENDDATA 3 0 2325100700021 ENDSUBENT 20 0 2325100799999 ENDENTRY 7 0 2325199999999