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