ENTRY 20575 20120712 22322057500000001 SUBENT 20575001 20120712 22322057500100001 BIB 13 49 2057500100002 TITLE Fission neutron spectra. Part II. Fission neutron 2057500100003 spectra of U-235, Pu-239 and Cf-252 2057500100004 AUTHOR (H.Conde, G.During, J.Hansen) 2057500100005 INSTITUTE (2SWDFOA) At present 2SWDFOI, Research Institute of 2057500100006 National Defence, Stockholm. 2057500100007 FACILITY (VDG,2SWDSWR) 5.5 MV Studsvik lab. Van de Graaff 2057500100008 accelerator for detector efficiency measurements 2057500100009 REFERENCE (J,AF,29,(24),313,196512) Main reference 2057500100010 (J,AF,29,(23),307,196512) Fission neutron spectra, 2057500100011 Part I. Time-of-flight equipment description and 2057500100012 detector efficiency determination 2057500100013 (W,During,19760801) Numerical data 2057500100014 METHOD (TOF) Time-of-flight, 1 m flight path. 2057500100015 (PHD) Pulse-height discrimination 2057500100016 DETECTOR (GLASD) A Li-6 glass detector was used for 2057500100017 detector efficiency measurement of the neutrons 2057500100018 70 keV to 1.1 MeV. 2057500100019 (SCIN) Liquid scintillation detector NE102A 2057500100020 were used for neutron spectra measurement from 2057500100021 70 keV to 6 MeV. 2057500100022 .Efficiencies of neutron detectors were determined 2057500100023 using the known efficiencies Li-6 glass detector and 2057500100024 long counter detectors using neutrons from T(P,N) 2057500100025 and D(D,N) reactions on 5.5 MV Van de Graaff accelera-2057500100026 tor of Studsvik laboratory. Details are given in 2057500100027 journal AF, vol.29, #23, page 307 (1965) 2057500100028 PART-DET (N) Fission neutrons 2057500100029 EN-SEC .Satisfactory maxwellian fits in the high energy 2057500100030 part of the spectra. 2057500100031 STATUS .Maxwellian temperatures given in Table 1 of 2057500100032 reference ark.Fys.29 (1965) 313. 2057500100033 .Numerical data for neutron spectra taken from 2057500100034 private communication of G.During. 2057500100035 .Data below 0.3 MeV are missing. 2057500100036 CORRECTION .Corrections are made for neutron background, for 2057500100037 high energy gamma spectra subtraction. Corrections 2057500100038 for elastic,inelastic scattering and secondary fission2057500100039 effects considered negligible except for the 2057500100040 measurements on U-235 and Pu-239. 2057500100041 ERR-ANALYS (DATA-ERR) No details given. 2057500100042 HISTORY (19760819C) 2057500100043 (19761217E) 2057500100044 (20110707A) Date is corrected to 8 digit format and 2057500100045 upper case comments converted to low case 2057500100046 (20110812A) REACTION codes corrected in all SUBENTs. 2057500100047 BIB information made up-to-date and placed in proper 2057500100048 SUBENTs. 2057500100049 (20120712U) SD: Information from INC-SOURCE moved to 2057500100050 SAMPLE in Subent 8. 2057500100051 ENDBIB 49 0 2057500100052 NOCOMMON 0 0 2057500100053 ENDSUBENT 52 0 2057500199999 SUBENT 20575002 20110812 22272057500200001 BIB 4 8 2057500200002 REACTION (92-U-235(N,F)0-NN-1,PR,KEM,,,DERIV) 2057500200003 ANALYSIS .Maxwell fitting of the neutron spectrum 2057500200004 STATUS (TABLE) Table 1 of AF, v.29, p.313, 1965 2057500200005 (DEP,20575003) 2057500200006 (DEP,20575004) 2057500200007 HISTORY (20110812A) REACTION codes "),,AKE,N" changed to 2057500200008 ")0-NN-1,PR,KEM,,,DERIV". Data corrected in 2057500200009 correspondence with Table 1. 2057500200010 ENDBIB 8 0 2057500200011 NOCOMMON 0 0 2057500200012 DATA 4 2 2057500200013 EN EN-RSL DATA DATA-ERR 2057500200014 MEV KEV MEV MEV 2057500200015 4.0000E-02 4.0000E+00 1.2400E+00 4.0000E-02 2057500200016 1.5000E+00 2.0000E+01 1.2500E+00 4.0000E-02 2057500200017 ENDDATA 4 0 2057500200018 ENDSUBENT 17 0 2057500299999 SUBENT 20575003 20110812 22272057500300001 BIB 9 19 2057500300002 REACTION (92-U-235(N,F),PR,NU/DE,,REL) Reference quantity not 2057500300003 given 2057500300004 FACILITY (VDG,2SWDFOA) 2.5 MeV Van de Graaff accelerator 2057500300005 of the Research Institute of National Defence, 2057500300006 Stockholm. Bunched 2 MeV proton beam 1 nanosec 2057500300007 duration 2 MHz repetition rate 2057500300008 REL-REF (I,,L.Beckman+,J,NIM,33,151,1965) Van de Graaff 2057500300009 accelerator description 2057500300010 INC-SOURCE (P-LI7) Thin metal lithium target was used for the 2057500300011 measurements on U-235 and Pu-239 at 40 keV incident 2057500300012 neutron energy 2057500300013 SAMPLE .2 cm diameter spheres of U-235 2057500300014 DETECTOR (SCIN) Measurements made using a plastic scintillator 2057500300015 as detector. 2057500300016 CORRECTION .Additional corrections for elastic, inelastic 2057500300017 scattering in sample and secondary fission effects 2057500300018 STATUS (TABLE) Delivered by G.During, 1976-08-01 2057500300019 HISTORY (20110812A) REACTION code",,DE,N changed"to",PR,NU/DE"2057500300020 BIB information corrected 2057500300021 ENDBIB 19 0 2057500300022 COMMON 2 3 2057500300023 EN EN-RSL 2057500300024 MEV KEV 2057500300025 4.0000E-02 4.0000E+00 2057500300026 ENDCOMMON 3 0 2057500300027 DATA 3 13 2057500300028 E DATA DATA-ERR 2057500300029 MEV ARB-UNITS ARB-UNITS 2057500300030 3.0000E-01 1.0500E+02 2.0000E+00 2057500300031 5.0000E-01 1.2900E+02 2.0000E+00 2057500300032 7.0000E-01 1.4200E+02 2.0000E+00 2057500300033 9.0000E-01 1.3600E+02 2.0000E+00 2057500300034 1.2500E+00 1.1300E+02 1.0000E+00 2057500300035 1.7500E+00 8.6800E+01 9.0000E-01 2057500300036 2.2500E+00 6.8400E+01 9.0000E-01 2057500300037 2.7500E+00 5.1200E+01 8.0000E-01 2057500300038 3.5000E+00 2.9900E+01 6.0000E-01 2057500300039 4.5000E+00 1.4200E+01 4.0000E-01 2057500300040 5.5000E+00 6.6000E+00 5.0000E-01 2057500300041 6.5000E+00 3.0000E+00 3.0000E-01 2057500300042 7.5000E+00 1.6000E+00 2.0000E-01 2057500300043 ENDDATA 15 0 2057500300044 ENDSUBENT 43 0 2057500399999 SUBENT 20575004 20110812 22272057500400001 BIB 9 19 2057500400002 REACTION (92-U-235(N,F),PR,NU/DE,,REL) Reference quantity not 2057500400003 given 2057500400004 FACILITY (VDG,2SWDFOA) 2.5 MeV Van de Graaff accelerator 2057500400005 of the Research Institute of National Defence, 2057500400006 Stockholm. Bunched 2 MeV proton beam 1 nanosec 2057500400007 duration 2 MHz repetition rate 2057500400008 REL-REF (I,,L.Beckman+,J,NIM,33,151,1965) Van de Graaff 2057500400009 accelerator description 2057500400010 INC-SOURCE (P-T) Thin adsorbed tritium-titanium target for the 2057500400011 measurements on U-235 at 1.5 MeV, 2057500400012 SAMPLE .2 cm diameter spheres of U-235 placed in a xenon-gas 2057500400013 scintillation chamber 2057500400014 CORRECTION .Additional corrections for elastic, inelastic 2057500400015 scattering in sample and secondary fission effects 2057500400016 DETECTOR (SCIN) Measurements made using a xenon-gas 2057500400017 scintillation chamber as detector . 2057500400018 STATUS (TABLE) Delivered by G.During, 1976-08-01 2057500400019 HISTORY (20110812A) REACTION code",,DE,N"changed to",PR,NU/DE"2057500400020 BIB information corrected 2057500400021 ENDBIB 19 0 2057500400022 COMMON 2 3 2057500400023 EN EN-RSL 2057500400024 MEV KEV 2057500400025 1.5000E+00 2.0000E+01 2057500400026 ENDCOMMON 3 0 2057500400027 DATA 3 11 2057500400028 E DATA DATA-ERR 2057500400029 MEV ARB-UNITS ARB-UNITS 2057500400030 3.0000E-01 1.1300E+01 9.0000E-01 2057500400031 5.0000E-01 1.1200E+01 7.0000E-01 2057500400032 7.0000E-01 1.0100E+01 6.0000E-01 2057500400033 9.0000E-01 1.0000E+01 5.0000E-01 2057500400034 1.2500E+00 9.1000E+00 4.0000E-01 2057500400035 1.7500E+00 6.7000E+00 4.0000E-01 2057500400036 2.2500E+00 5.4000E+00 3.0000E-01 2057500400037 2.7500E+00 3.9000E+00 3.0000E-01 2057500400038 3.5000E+00 2.4000E+00 2.0000E-01 2057500400039 4.5000E+00 1.4000E+00 1.0000E-01 2057500400040 5.5000E+00 8.2000E-01 1.0000E-01 2057500400041 ENDDATA 13 0 2057500400042 ENDSUBENT 41 0 2057500499999 SUBENT 20575005 20110812 22272057500500001 BIB 4 7 2057500500002 REACTION (94-PU-239(N,F)0-NN-1,PR,KEM,,,DERIV) 2057500500003 ANALYSIS .Maxwell fitting of the neutron spectrum 2057500500004 STATUS (TABLE) Table 1 of AF, v.29, p.313, 1965 2057500500005 (DEP,20575006) 2057500500006 HISTORY (20110812A) REACTION codes "),,AKE,N" changed to 2057500500007 ")0-NN-1,PR,KEM,,,DERIV". Data corrected in 2057500500008 correspondence with Table 1. 2057500500009 ENDBIB 7 0 2057500500010 NOCOMMON 0 0 2057500500011 DATA 4 1 2057500500012 EN EN-RSL DATA DATA-ERR 2057500500013 MEV KEV MEV MEV 2057500500014 4.0000E-02 4.0000E+00 1.3400E+00 4.0000E-02 2057500500015 ENDDATA 3 0 2057500500016 ENDSUBENT 15 0 2057500599999 SUBENT 20575006 20110812 22272057500600001 BIB 9 18 2057500600002 REACTION (94-PU-239(N,F),PR,NU/DE,,REL) Reference quantity not 2057500600003 given 2057500600004 FACILITY (VDG,2SWDFOA) 2.5 MeV Van de Graaff accelerator 2057500600005 of the Research Institute of National Defence, 2057500600006 Stockholm. Bunched 2 MeV proton beam 1 nanosec 2057500600007 duration 2 MHz repetition rate 2057500600008 REL-REF (I,,L.Beckman+,J,NIM,33,151,1965) Van de Graaff 2057500600009 accelerator description 2057500600010 INC-SOURCE (P-LI7) Thin metal lithium target was used for the 2057500600011 measurements on U-235 and Pu-239 at 40 keV incident 2057500600012 neutron energy 2057500600013 DETECTOR (SCIN) 5 by 2 inch scintillation detector 2057500600014 SAMPLE .2 cm diameter spheres of Pu-239. 2057500600015 CORRECTION .Additional corrections for elastic, inelastic 2057500600016 scattering in sample and secondary fission effects 2057500600017 STATUS (TABLE) Delivered by G.During, 1976-08-01 2057500600018 HISTORY (20110812A) REACTION code",,DE,N"changed to",PR,NU/DE"2057500600019 BIB information corrected 2057500600020 ENDBIB 18 0 2057500600021 COMMON 2 3 2057500600022 EN EN-RSL 2057500600023 MEV KEV 2057500600024 4.0000E-02 4.0000E+00 2057500600025 ENDCOMMON 3 0 2057500600026 DATA 3 13 2057500600027 E DATA DATA-ERR 2057500600028 MEV ARB-UNITS ARB-UNITS 2057500600029 3.0000E-01 1.5300E+01 1.4000E+00 2057500600030 5.0000E-01 1.7700E+01 9.0000E-01 2057500600031 7.0000E-01 1.9800E+01 8.0000E-01 2057500600032 9.0000E-01 1.9000E+01 7.0000E-01 2057500600033 1.2500E+00 1.6300E+01 4.0000E-01 2057500600034 1.7500E+00 1.3300E+01 4.0000E-01 2057500600035 2.2500E+00 1.0700E+01 3.0000E-01 2057500600036 2.7500E+00 8.0400E+00 3.0000E-01 2057500600037 3.5000E+00 5.2000E+00 2.0000E-01 2057500600038 4.5000E+00 2.6900E+00 2.0000E-01 2057500600039 5.5000E+00 1.3600E+00 1.6000E-01 2057500600040 6.5000E+00 7.1000E-01 1.2000E-01 2057500600041 7.5000E+00 4.1000E-01 1.1000E-01 2057500600042 ENDDATA 15 0 2057500600043 ENDSUBENT 42 0 2057500699999 SUBENT 20575007 20110812 22272057500700001 BIB 4 7 2057500700002 REACTION (98-CF-252(0,F)0-NN-1,PR,KEM,,,DERIV) 2057500700003 ANALYSIS .Maxwell fitting of the neutron spectrum 2057500700004 STATUS (TABLE) Table 1 of AF, v.29, p.313, 1965 2057500700005 (DEP,20575008) 2057500700006 HISTORY (20110812A) REACTION codes "),,AKE,N" changed to 2057500700007 ")0-NN-1,PR,KEM,,,DERIV". Data corrected in 2057500700008 correspondence with Table 1. 2057500700009 ENDBIB 7 0 2057500700010 NOCOMMON 0 0 2057500700011 DATA 2 1 2057500700012 DATA DATA-ERR 2057500700013 MEV MEV 2057500700014 1.3900E+00 4.0000E-02 2057500700015 ENDDATA 3 0 2057500700016 ENDSUBENT 15 0 2057500799999 SUBENT 20575008 20120712 22322057500800001 BIB 5 16 2057500800002 REACTION (98-CF-252(0,F),PR,NU/DE,,REL) Reference quantity not 2057500800003 given 2057500800004 DETECTOR (GLASD) A Li-glass detector 1-3/4 inch by 3/8 inch 2057500800005 placed by 25 cm from spontaneous fission source was 2057500800006 used for the measurement of the neutron spectrum 2057500800007 from 70 to 500 keV. 2057500800008 (SCIN) Plastic scintillator NE102A, 5 inch diameter 2057500800009 by 2 inch length placed at 1 m from fission source 2057500800010 was used for the measurement of the neutron spectrum 2057500800011 from 300 keV to 7 MeV. 2057500800012 SAMPLE CF-252 placed in a xenon-gas scintillation chamber 2057500800013 STATUS (TABLE) Delivered by G.During, 1976-08-01 2057500800014 HISTORY (20110812A) REACTION code",,DE,N"changed to",PR,NU/DE"2057500800015 BIB information corrected 2057500800016 (20120712U) SD: Information from INC-SOURCE moved to 2057500800017 SAMPLE. 2057500800018 ENDBIB 16 0 2057500800019 NOCOMMON 0 0 2057500800020 DATA 3 11 2057500800021 E DATA DATA-ERR 2057500800022 MEV ARB-UNITS ARB-UNITS 2057500800023 7.0000E-01 1.1100E+01 4.0000E-01 2057500800024 9.0000E-01 1.0800E+01 5.0000E-01 2057500800025 1.2500E+00 9.9000E+00 3.0000E-01 2057500800026 1.7500E+00 8.1000E+00 3.0000E-01 2057500800027 2.2500E+00 6.1500E+00 3.0000E-01 2057500800028 2.7500E+00 4.8000E+00 1.6000E-01 2057500800029 3.5000E+00 3.2000E+00 1.5000E-01 2057500800030 4.5000E+00 1.8000E+00 1.0000E-01 2057500800031 5.5000E+00 8.4000E-01 7.0000E-02 2057500800032 6.5000E+00 5.1000E-01 8.0000E-02 2057500800033 7.5000E+00 2.7000E-01 5.0000E-02 2057500800034 ENDDATA 13 0 2057500800035 ENDSUBENT 34 0 2057500899999 ENDENTRY 8 0 2057599999999