ENTRY 40740 20111220 41554074000000001 SUBENT 40740001 20111220 41554074000100001 BIB 13 37 4074000100002 INSTITUTE (4RUSFEI) 4074000100003 REFERENCE (R,FEI-947,1979) 4074000100004 AUTHOR (V.Ya.Baryba,N.V.Kornilov,O.A.Sal'nikov) 4074000100005 TITLE Prompt neutron fission spectrum of U-238 for 14.3 MeV 4074000100006 incident neutrons 4074000100007 FACILITY (VDG,4RUSFEI) Accelerator NG-03 4074000100008 METHOD (TOF) Flight base 210.cm . Time resolution (FWHM) 3ns. 4074000100009 (COINC) "Fast-slow" coincidences of neutrons and FF. 4074000100010 DETECTOR 1(SOLST) Stilbene crystal of 70 mm diameter, 50 mm high,4074000100011 connected with FEU-30. Placed at 90 deg relative to 4074000100012 neutron beam. Used for neutron detection. 4074000100013 2(IOCH) For FF detection. 4074000100014 Filled with Ar + 10% CO2 at about 4 atm. pressure. 4074000100015 PART-DET 1(N) 4074000100016 2(FF) 4074000100017 MONITOR (98-CF-252(0,F),,NU/DE) 4074000100018 To measure absolute efficiency of neutron detector in 4074000100019 energy range 0.5 - 12 MeV. 4074000100020 From V.Ya.Baryba+,Voprosy At.Nauki i tekhniki, 4074000100021 (5/19),45,1977. Seriya is not given. 4074000100022 ASSUMED (ASSUM,98-CF-252(0,F)0-NN-1,,KEM) Spectrum temperature.4074000100023 SAMPLE U-238 34 layers of 1.5 mg/cm**2 thickness, 55 mm 4074000100024 diameter on Al electrodes of 0.1 mm thickness. 4074000100025 Distance between electrodes 1.2 mm. 4074000100026 Total mass 2.69 g. 4074000100027 CORRECTION For attenuation <1.%. 4074000100028 For background. 4074000100029 HISTORY (19840621C) Compiled at the CJD 4074000100030 (19870220U) EN-SEC in SAN 004 deleted 4074000100031 (19920703A) SUBENT 40740004 deleted on the reason that 4074000100032 those data are of model character 4074000100033 (20010319A) Date is corrected 4074000100034 (20111220A) Upper -> lower case correction. 4074000100035 REACTION was corrected in Subent 002: 4074000100036 92-U-238(N,F),PR,DE,N -> 92-U-238(N,F),PR,NU/DE 4074000100037 units : 1/MEV -> PT/FIS/MEV . 4074000100038 BIB and COMMON information was added. 4074000100039 ENDBIB 37 0 4074000100040 COMMON 3 3 4074000100041 EN ASSUM ASSUM-ERR 4074000100042 MEV MEV MEV 4074000100043 14.3 1.42 0.02 4074000100044 ENDCOMMON 3 0 4074000100045 ENDSUBENT 44 0 4074000199999 SUBENT 40740002 20111220 41554074000200001 BIB 2 3 4074000200002 REACTION (92-U-238(N,F),PR,NU/DE) 4074000200003 Units for data are NEUTRONS/FIS/MEV 4074000200004 STATUS (TABLE) Table 1 of R,FEI-947. 4074000200005 ENDBIB 3 0 4074000200006 NOCOMMON 0 0 4074000200007 DATA 3 62 4074000200008 E DATA ERR-S 4074000200009 MEV PT/FIS/MEV PER-CENT 4074000200010 .60 1.94 17. 4074000200011 .70 1.87 17. 4074000200012 .80 1.69 9.8 4074000200013 .90 1.75 9.8 4074000200014 1.00 1.70 9.8 4074000200015 1.10 1.64 9.8 4074000200016 1.20 1.49 9.8 4074000200017 1.30 1.45 9.8 4074000200018 1.38 1.41 7.4 4074000200019 1.49 1.46 7.4 4074000200020 1.59 1.27 7.4 4074000200021 1.70 1.20 7.4 4074000200022 1.81 1.13 6.6 4074000200023 1.90 1.22 6.6 4074000200024 1.99 1.13 6.6 4074000200025 2.09 1.08 6.6 4074000200026 2.20 1.01 6.3 4074000200027 2.31 .87 6.3 4074000200028 2.41 .90 6.3 4074000200029 2.51 .86 6.3 4074000200030 2.62 .79 6.2 4074000200031 2.71 .79 6.2 4074000200032 2.80 .78 6.2 4074000200033 2.90 .70 6.2 4074000200034 3.00 .69 6.2 4074000200035 3.11 .61 6.2 4074000200036 3.18 .55 6.2 4074000200037 3.30 .54 6.6 4074000200038 3.43 .54 6.6 4074000200039 3.52 .50 6.6 4074000200040 3.61 .47 6.6 4074000200041 3.70 .44 6.6 4074000200042 3.80 .43 6.6 4074000200043 3.90 .45 6.6 4074000200044 4.00 .39 6.6 4074000200045 4.12 .38 6.6 4074000200046 4.23 .34 6.6 4074000200047 4.35 .31 7.2 4074000200048 4.48 .30 7.2 4074000200049 4.61 .29 7.2 4074000200050 4.75 .26 7.2 4074000200051 4.89 .25 8.0 4074000200052 5.04 .21 8.0 4074000200053 5.19 .22 8.0 4074000200054 5.36 .18 8.0 4074000200055 5.53 .18 8.0 4074000200056 5.71 .16 9.7 4074000200057 5.87 .137 9.7 4074000200058 6.10 .124 9.7 4074000200059 6.31 .135 9.7 4074000200060 6.53 .095 9.7 4074000200061 6.76 .091 9.7 4074000200062 7.00 .072 13.0 4074000200063 7.26 .088 13.0 4074000200064 7.53 .078 13.0 4074000200065 7.82 .056 13.0 4074000200066 8.16 .048 17.0 4074000200067 8.45 .027 17.0 4074000200068 8.79 .036 17.0 4074000200069 9.16 .033 17.0 4074000200070 9.54 .025 17.0 4074000200071 9.96 .021 30.0 4074000200072 ENDDATA 64 0 4074000200073 ENDSUBENT 72 0 4074000299999 SUBENT 40740003 20111220 41554074000300001 BIB 3 10 4074000300002 REACTION (92-U-238(N,F),PR,NU) 4074000300003 ANALYSIS (INTED) To extrapolate spectrum to E=0, parameters 4074000300004 of Maxwellian distribution were used: 4074000300005 E, MeV T,MeV A,MeV**-1.5 4074000300006 0.6-2.0 1.239+-0.044 379.5+-15.0 4074000300007 1.5-3.5 1.392+-0.022 327.3+-13.0 4074000300008 3.0-7.0 1.575+-0.022 248.0+-11.0 4074000300009 6.5-10. 1.800+-0.100 150.0+-9.0 4074000300010 STATUS (TABLE) Text, page 5, 6 of R,FEI947. 4074000300011 (DEP,40740002) Defined as total integral of spectrum. 4074000300012 ENDBIB 10 0 4074000300013 NOCOMMON 0 0 4074000300014 DATA 2 1 4074000300015 DATA DATA-ERR 4074000300016 PRT/FIS PRT/FIS 4074000300017 5.07 .13 4074000300018 ENDDATA 3 0 4074000300019 ENDSUBENT 18 0 4074000399999 NOSUBENT 40740004 19920703 00004074000400001 ENDENTRY 4 0 4074099999999