ENTRY 40058 20141109 41674005800000001 SUBENT 40058001 20141109 41674005800100001 BIB 14 65 4005800100002 INSTITUTE (4RUSKUR) 4005800100003 REFERENCE (C,70HELSINKI,2,157,197006) 4005800100004 IAEA-CN-26/40 . 4005800100005 https://www-nds.iaea.org/publications/ 4005800100006 proceedings/sti-pub-259-Vol2.pdf 4005800100007 AUTHOR (M.V.Savin,Yu.A.Khokhlov,Yu.S.Zamjatnin,I.N.Paramonova)4005800100008 TITLE The average number of prompt neutrons in fast neutron 4005800100009 induced fission of U-235, Pu-239 and Pu-240 4005800100010 FACILITY (LINAC,4RUSKUR) Electron Linear Accelerator with 4005800100011 electrons energy ~17 MeV. 4005800100012 Pulse frequency 2000 1/sec, duration (FWHM) ~ 30 nsec.4005800100013 INC-SOURCE Electron reactions on lead target. 4005800100014 METHOD (TOF) Time of Flight. Neutron pulse length- 4005800100015 30 nsec. Flight distance 35 m. 4005800100016 Time resolution 1 nsec/m. 4005800100017 Fission event was detected by fiss. prompt gamma-rays. 4005800100018 Measurements were done with samples, lead, without 4005800100019 sample. 4005800100020 Measurement with lead was done to take into account 4005800100021 neutrons el. and inel. scattering on samples. 4005800100022 DETECTOR (SCIN) Liquid scintillation detector volume 400 l. 4005800100023 Fission neutron counting efficiency ~70%. 4005800100024 Installed at 35 m from neutron source target. 4005800100025 Sample was placed inside scintillation detector. 4005800100026 Detector registered prompt gammas and fission neutrons 4005800100027 by gamma-rays from capture of slowed neutron by cadmium4005800100028 ( Cd contained in scintillator liquid). 4005800100029 Equipped by 12 photomultipliers FEU-49B. 4005800100030 Cf-252 fission chamber was used to measure efficiency 4005800100031 of gammas and neutrons detection: 4005800100032 - 0.347+-0.002 for gammas, 4005800100033 - 0.789+-0.004 for neutrons. 4005800100034 (PROPC) All-waves counter as neutron beam monitor. 4005800100035 MONITOR ((MONIT)98-CF-252(0,F),PR,NU) 4005800100036 Nu-value for Spontaneous fission of 4005800100037 Cf-252 was taken as 3.772. 4005800100038 PART-DET (G,N) Gammas and neutrons. 4005800100039 CORRECTION Correction were applied for 4005800100040 1.Angular correlation of fission neutron- 4005800100041 incident neutron 4005800100042 2.Difference of fission neutron spectra from4005800100043 those of Cf-252 4005800100044 3.Multiplication of neutrons in samples 4005800100045 4.Contents of another isotopes in samples 4005800100046 Backgrounds were subtracted: 4005800100047 - random coincidences (on the base of measurement 4005800100048 without sample), 4005800100049 - el. and inel. scattering neutrons (on the base of 4005800100050 measurement with lead). 4005800100051 ERR-ANALYS No information available for EN-ERR 4005800100052 (DATA-ERR) Quoted error includes 4005800100053 (ERR-S,0.5,0.7) Statistical ( deviation from average). 4005800100054 Stat. uncertainty in each series - 1.-1.5 % . 4005800100055 (ERR-1) Change of fission neutron counting efficiency 4005800100056 (ERR-2) Error in background definition by lead. 4005800100057 Errors of corrections on time channel starts by 4005800100058 fission neutrons at EN=0.7-0.9 MeV - about 0.5 %. 4005800100059 STATUS (TABLE) Received from author 4005800100060 HISTORY (19710318C) 4005800100061 (20060810A) M.M. Correction according to Memo CP-E/089.4005800100062 (20141109A) SD: Page of ref.corrected (157(40) -> 157).4005800100063 Data from archive were restored in Subents 002-004. 4005800100064 (20150127A) M.M. Article was checked, BIB information 4005800100065 was updated in REFERENCE, FACILITY,METHOD,PART-DET, 4005800100066 CORRECTION,ERR-ANALYS,SAMPLE. 4005800100067 ENDBIB 65 0 4005800100068 COMMON 3 3 4005800100069 MONIT ERR-1 ERR-2 4005800100070 PRT/FIS PER-CENT PER-CENT 4005800100071 3.772 0.5 0.5 4005800100072 ENDCOMMON 3 0 4005800100073 ENDSUBENT 72 0 4005800199999 SUBENT 40058002 20141109 41674005800200001 BIB 4 5 4005800200002 REACTION (94-PU-240(N,F),PR,NU) 4005800200003 SAMPLE (94-PU-240,ENR=0.8147) Oxide PuO(2). Weight=10g. 4005800200004 Pu-239 - 9.17%, Pu-241 - 9.36 % . 4005800200005 ERR-ANALYS (ERR-3,,1.5) Uncertainty due to background . 4005800200006 HISTORY (20141109S) SD 4005800200007 ENDBIB 5 0 4005800200008 NOCOMMON 0 0 4005800200009 DATA 3 24 4005800200010 EN DATA DATA-ERR 4005800200011 MEV PRT/FIS PRT/FIS 4005800200012 1.08 3.138 0.156 4005800200013 1.15 3.221 0.161 4005800200014 1.23 3.018 0.120 4005800200015 1.31 3.038 0.106 4005800200016 1.39 3.037 0.106 4005800200017 1.46 3.051 0.112 4005800200018 1.54 3.192 0.102 4005800200019 1.62 3.260 0.097 4005800200020 1.71 3.170 0.095 4005800200021 1.81 3.264 0.091 4005800200022 1.92 3.238 0.090 4005800200023 2.02 3.175 0.104 4005800200024 2.15 3.151 0.104 4005800200025 2.29 3.280 0.114 4005800200026 2.39 3.262 0.114 4005800200027 2.50 3.435 0.127 4005800200028 2.62 3.367 0.134 4005800200029 2.74 3.327 0.133 4005800200030 2.88 3.450 0.138 4005800200031 3.02 3.423 0.143 4005800200032 3.18 3.484 0.156 4005800200033 3.53 3.501 0.157 4005800200034 3.73 3.406 0.170 4005800200035 3.94 3.507 0.200 4005800200036 ENDDATA 26 0 4005800200037 ENDSUBENT 36 0 4005800299999 SUBENT 40058003 20141109 41674005800300001 BIB 4 5 4005800300002 REACTION (94-PU-239(N,F),PR,NU) 4005800300003 SAMPLE (94-PU-239,ENR=0.98) Metallic. Weight=24.21 g. 4005800300004 Set of discs of 15 mm diameter, 1mm thickness. 4005800300005 ERR-ANALYS (ERR-3,,1.) Uncertainty due to background . 4005800300006 HISTORY (20141109S) SD 4005800300007 ENDBIB 5 0 4005800300008 NOCOMMON 0 0 4005800300009 DATA 3 41 4005800300010 EN DATA DATA-ERR 4005800300011 MEV PRT/FIS PRT/FIS 4005800300012 0.89 3.026 0.070 4005800300013 0.96 3.005 0.060 4005800300014 0.99 3.011 0.060 4005800300015 1.03 3.049 0.046 4005800300016 1.07 3.009 0.046 4005800300017 1.10 3.053 0.046 4005800300018 1.14 3.089 0.047 4005800300019 1.17 3.066 0.046 4005800300020 1.22 3.061 0.046 4005800300021 1.26 2.984 0.045 4005800300022 1.30 3.021 0.045 4005800300023 1.34 3.129 0.047 4005800300024 1.39 3.118 0.047 4005800300025 1.49 3.138 0.047 4005800300026 1.54 3.165 0.047 4005800300027 1.60 3.135 0.045 4005800300028 1.66 3.100 0.045 4005800300029 1.72 3.142 0.047 4005800300030 1.78 3.203 0.048 4005800300031 1.85 3.217 0.048 4005800300032 1.91 3.220 0.048 4005800300033 1.97 3.243 0.048 4005800300034 2.05 3.163 0.047 4005800300035 2.14 3.176 0.047 4005800300036 2.23 3.230 0.048 4005800300037 2.36 3.227 0.048 4005800300038 2.49 3.310 0.049 4005800300039 2.59 3.304 0.049 4005800300040 2.67 3.338 0.057 4005800300041 2.79 3.320 0.056 4005800300042 3.01 3.364 0.057 4005800300043 3.21 3.415 0.061 4005800300044 3.34 3.395 0.061 4005800300045 3.52 3.387 0.061 4005800300046 3.72 3.379 0.067 4005800300047 3.94 3.439 0.075 4005800300048 4.05 3.579 0.078 4005800300049 4.23 3.558 0.089 4005800300050 4.35 3.551 0.089 4005800300051 4.49 3.661 0.091 4005800300052 4.70 3.684 0.110 4005800300053 ENDDATA 43 0 4005800300054 ENDSUBENT 53 0 4005800399999 SUBENT 40058004 20141109 41674005800400001 BIB 4 5 4005800400002 REACTION (92-U-235(N,F),PR,NU) 4005800400003 SAMPLE (92-U-235,ENR=0.90) Metallic., weight 30.7 g., 4005800400004 Set of discs of 15 mm diameter, 1mm thickness. 4005800400005 ERR-ANALYS (ERR-3,,1.) Uncertainty due to background . 4005800400006 HISTORY (20141109S) SD 4005800400007 ENDBIB 5 0 4005800400008 NOCOMMON 0 0 4005800400009 DATA 3 37 4005800400010 EN DATA DATA-ERR 4005800400011 MEV PRT/FIS PRT/FIS 4005800400012 0.65 2.432 0.039 4005800400013 0.68 2.447 0.039 4005800400014 0.71 2.472 0.039 4005800400015 0.73 2.473 0.039 4005800400016 0.79 2.478 0.039 4005800400017 0.82 2.491 0.040 4005800400018 0.87 2.474 0.039 4005800400019 0.91 2.499 0.040 4005800400020 0.97 2.484 0.039 4005800400021 1.01 2.491 0.039 4005800400022 1.06 2.539 0.038 4005800400023 1.15 2.575 0.038 4005800400024 1.25 2.578 0.038 4005800400025 1.35 2.613 0.039 4005800400026 1.41 2.618 0.039 4005800400027 1.48 2.636 0.039 4005800400028 1.63 2.641 0.039 4005800400029 1.80 2.641 0.039 4005800400030 1.97 2.645 0.039 4005800400031 2.05 2.661 0.040 4005800400032 2.18 2.700 0.033 4005800400033 2.26 2.713 0.035 4005800400034 2.39 2.748 0.035 4005800400035 2.55 2.711 0.035 4005800400036 2.68 2.763 0.033 4005800400037 2.85 2.812 0.034 4005800400038 2.94 2.806 0.034 4005800400039 3.06 2.800 0.034 4005800400040 3.28 2.833 0.043 4005800400041 3.71 2.871 0.043 4005800400042 4.23 2.903 0.044 4005800400043 4.57 2.937 0.058 4005800400044 4.90 3.032 0.061 4005800400045 5.32 3.095 0.072 4005800400046 5.60 3.110 0.082 4005800400047 5.94 3.234 0.106 4005800400048 6.60 3.373 0.111 4005800400049 ENDDATA 39 0 4005800400050 ENDSUBENT 49 0 4005800499999 ENDENTRY 4 0 4005899999999