ENTRY 10595 20201130 14751059500000001
SUBENT 10595001 20201130 14751059500100001
BIB 11 30 1059500100002
TITLE The U235 neutron fission cross section measurement at 1059500100003
the NBS linac 1059500100004
AUTHOR (O.A.Wasson) 1059500100005
INSTITUTE (1USANBS) 1059500100006
REFERENCE (C,76ANL,,183,1976) 1059500100007
(J,NSE,81,196,1982) Revised data in table 1059500100008
REL-REF (O,10950001,O.A.Wasson+,J,NSE,81,196,1982) 1059500100009
235U(n,f) cross sections from the same fission chamber1059500100010
FACILITY (LINAC,1USANBS) NBS linear accelerator 1059500100011
SAMPLE 10 surfaces each coated with ~0.1 mg/cm2 of 235U 1059500100012
placed at 69 m along the flight path 1059500100013
DETECTOR (FISCH) 10-plate fission chamber with Cd shield 1059500100014
CORRECTION Corrections made for 1059500100015
- background (measured by resonance filter technique),1059500100016
- dead time, 1059500100017
- neutron scattering in fission chamber, 1059500100018
- detector efficiencies, 1059500100019
- neutron transmission between fission chamber and 1059500100020
flux monitor, 1059500100021
- spectrum loss in proportional counter, 1059500100022
- timing shift in proportional counter. 1059500100023
STATUS (TABLE) Revised data received in private communication,1059500100024
O.Wasson, 1981/12. 1059500100025
(APRVD) Approved by O.A.Wasson 1982/4/22. 1059500100026
HISTORY (19760413C) 1059500100027
(19820112A) BIB corrections and additions. 1059500100028
(19830922A) BIB corrections. 1059500100029
(20040723A) Converted to new data formats, lower case. 1059500100030
(20170510A) On. Major revisions in 002+003. 005 added. 1059500100031
(20201130A) On. Important alteration in 003. 1059500100032
ENDBIB 30 0 1059500100033
NOCOMMON 0 0 1059500100034
ENDSUBENT 33 0 1059500199999
SUBENT 10595002 20170510 14321059500200001
BIB 8 20 1059500200002
REACTION (92-U-235(N,F),,SIG,,AV) 1059500200003
METHOD (TOF) 200 m flight path 1059500200004
DETECTOR (PROPC) Hydrogen proportional counter flux monitor 1059500200005
MONITOR ((MONIT)92-U-235(N,F),,SIG) 1059500200006
Normalized to 2.55+/-0.05 b at 10-20 keV, 1059500200007
which is from 243.7+/-1.0 b*eV at 7.8-11.0 eV, 1059500200008
which is from thermal cross section of 583.54 b 1059500200009
(1-H-1(N,EL)1-H-1,,SIG) 1059500200010
Shape normalization from ENDF/B-V 1059500200011
MONIT-REF (,W.P.Poenitz,R,ANL-NDM-45,1979) 235U(n,f) 1059500200012
(,J.C.Hopkins+,J,ND/A,9,137,1971) n-p data in ENDF/B-V 1059500200013
ERR-ANALYS (ERR-T) Total uncertainty 1059500200014
(ERR-S) Statistical uncertainty 1059500200015
(ERR-1) Shape systematic uncertainty 1059500200016
(ERR-2) Normalization uncertainty 1059500200017
STATUS (TABLE) Received from O.Wasson, 1981/12 1059500200018
(COREL,10595003) 6 eV to 30 keV with 6Li glass detector1059500200019
(COREL,10595005) Broader group structure 1059500200020
HISTORY (19820112A) Data replaced 1059500200021
(20170510A) On.MONIT-ERR moved to text(a part of ERR-2)1059500200022
ENDBIB 20 0 1059500200023
COMMON 4 3 1059500200024
EN-NRM-MIN EN-NRM-MAX MONIT ERR-2 1059500200025
KEV KEV B PER-CENT 1059500200026
10. 20. 2.55 2.4 1059500200027
ENDCOMMON 3 0 1059500200028
DATA 6 77 1059500200029
EN-MIN EN-MAX DATA ERR-T ERR-S ERR-1 1059500200030
KEV KEV B PER-CENT PER-CENT PER-CENT 1059500200031
5.0 5.5 3.987 3.7 1.5 2.4 1059500200032
5.5 6.0 4.171 3.7 1.6 2.3 1059500200033
6.0 6.5 3.445 3.7 1.7 2.2 1059500200034
6.5 7.0 3.284 3.6 1.8 2.1 1059500200035
7.0 7.5 3.434 3.6 1.8 2.0 1059500200036
7.5 8.0 3.217 3.6 2.0 1.9 1059500200037
8.0 8.5 2.797 3.7 2.2 1.9 1059500200038
8.5 9.0 3.260 3.6 2.0 1.8 1059500200039
9.0 9.5 3.255 3.5 2.0 1.7 1059500200040
9.5 10.0 3.208 3.5 2.0 1.7 1059500200041
10.0 11.0 2.754 3.3 1.5 1.6 1059500200042
11.0 12.0 2.803 3.3 1.5 1.6 1059500200043
12.0 13.0 2.526 3.3 1.7 1.6 1059500200044
13.0 14.0 2.815 3.3 1.6 1.5 1059500200045
14.0 15.0 2.685 3.3 1.7 1.5 1059500200046
15.0 16.0 2.356 3.4 1.9 1.5 1059500200047
16.0 17.0 2.385 3.4 1.9 1.5 1059500200048
17.0 18.0 2.267 3.4 1.9 1.5 1059500200049
18.0 19.0 2.513 3.4 1.9 1.5 1059500200050
19.0 20.0 2.360 3.4 1.9 1.4 1059500200051
20.0 22.0 2.168 3.1 1.4 1.4 1059500200052
22.0 24.0 2.262 3.1 1.4 1.4 1059500200053
24.0 26.0 2.143 3.1 1.4 1.4 1059500200054
26.0 28.0 2.161 3.2 1.6 1.4 1059500200055
28.0 30.0 2.114 3.4 1.9 1.4 1059500200056
30.0 32.0 2.046 3.3 1.8 1.5 1059500200057
32.0 34.0 2.079 3.6 1.8 1.9 1059500200058
34.0 36.0 2.025 4.0 2.2 2.4 1059500200059
36.0 38.0 1.935 3.8 2.1 2.1 1059500200060
38.0 40.0 1.883 3.5 1.9 1.6 1059500200061
40.0 42.0 1.874 3.3 1.9 1.3 1059500200062
42.0 44.0 1.824 3.3 1.9 1.3 1059500200063
44.0 46.0 1.801 3.3 1.9 1.3 1059500200064
46.0 48.0 1.792 3.3 1.9 1.3 1059500200065
48.0 50.0 1.848 3.3 1.9 1.3 1059500200066
50.0 54.0 1.798 3.1 1.5 1.3 1059500200067
54.0 58.0 1.813 3.1 1.4 1.3 1059500200068
58.0 62.0 1.794 3.1 1.4 1.3 1059500200069
62.0 66.0 1.754 3.1 1.5 1.3 1059500200070
66.0 70.0 1.681 3.1 1.5 1.3 1059500200071
70.0 74.0 1.703 3.1 1.5 1.2 1059500200072
74.0 78.0 1.622 3.1 1.6 1.2 1059500200073
78.0 82.0 1.608 3.1 1.6 1.2 1059500200074
82.0 86.0 1.612 3.3 1.8 1.3 1059500200075
86.0 90.0 1.620 3.4 1.9 1.5 1059500200076
90.0 94.0 1.587 3.4 1.8 1.5 1059500200077
94.0 98.0 1.646 3.2 1.7 1.3 1059500200078
98.0 100.0 1.604 3.2 1.7 1.3 1059500200079
100.0 105.0 1.561 3.6 1.5 2.2 1059500200080
105.0 110.0 1.513 3.2 1.5 1.5 1059500200081
110.0 115.0 1.459 3.1 1.6 1.3 1059500200082
115.0 120.0 1.524 3.1 1.5 1.3 1059500200083
120.0 125.0 1.506 3.2 1.6 1.3 1059500200084
125.0 130.0 1.482 3.1 1.5 1.3 1059500200085
130.0 135.0 1.398 3.2 1.6 1.4 1059500200086
135.0 140.0 1.441 3.5 1.5 2.0 1059500200087
140.0 145.0 1.404 3.4 1.8 1.6 1059500200088
145.0 150.0 1.445 3.3 1.8 1.4 1059500200089
150.0 160.0 1.443 4.2 1.2 3.3 1059500200090
160.0 170.0 1.398 4.2 1.2 3.3 1059500200091
170.0 180.0 1.393 3.5 1.2 2.2 1059500200092
180.0 190.0 1.412 3.0 1.2 1.4 1059500200093
190.0 200.0 1.348 3.2 1.2 1.7 1059500200094
200.0 220.0 1.357 2.9 0.9 1.3 1059500200095
220.0 240.0 1.302 2.9 0.9 1.3 1059500200096
240.0 260.0 1.256 2.9 0.9 1.3 1059500200097
260.0 280.0 1.204 2.9 0.9 1.3 1059500200098
280.0 300.0 1.174 2.9 0.9 1.3 1059500200099
300.0 340.0 1.196 2.8 0.7 1.3 1059500200100
340.0 380.0 1.203 2.8 0.7 1.3 1059500200101
380.0 400.0 1.196 2.9 0.7 1.4 1059500200102
400.0 450.0 1.169 3.0 0.6 1.7 1059500200103
450.0 500.0 1.164 3.3 0.7 2.1 1059500200104
500.0 550.0 1.129 3.2 0.6 2.0 1059500200105
550.0 600.0 1.130 3.1 0.6 1.9 1059500200106
600.0 700.0 1.122 3.1 0.5 1.9 1059500200107
700.0 800.0 1.108 3.1 0.5 2.0 1059500200108
ENDDATA 79 0 1059500200109
ENDSUBENT 108 0 1059500299999
SUBENT 10595003 20201130 14751059500300001
BIB 8 25 1059500300002
REACTION (92-U-235(N,F),,SIG,,AV) 1059500300003
METHOD (TOF) 23 m flight path 1059500300004
DETECTOR (GLASD) 6Li glass scintillator flux monitor 1059500300005
MONITOR ((MONIT)92-U-235(N,F),,INT) 1059500300006
Absolute normalization 1059500300007
(3-LI-6(N,T)2-HE-4,,SIG) 1059500300008
Shape normalization from ENDF/B-V 1059500300009
MONIT-REF (,W.P.Poenitz,R,ANL-NDM-45,1979) 235U(n,f) 1059500300010
(,L.Stewart+,R,LA-7663-MS,1979) 6Li(n,t) in ENDF/B-V 1059500300011
ERR-ANALYS (ERR-T) Total uncertainty 1059500300012
(ERR-S) Statistical uncertainty 1059500300013
(ERR-2) Backgrounds in detector and fission chamber 1059500300014
(ERR-3) Neutron scattering and transmission in 1059500300015
6Li glass detector 1059500300016
(ERR-4) 6Li(n,a) cross section uncertainty 1059500300017
(MONIT-ERR) Normalization of 235U in 7.8-11 eV interval1059500300018
STATUS (TABLE) Received from O.Wasson, 1981/12 (=Table A.II of1059500300019
Nucl.Sci.Eng.81(1982)196 with detailed uncertainties) 1059500300020
(COREL,10595002) 5 to 800 keV by hydrogen prop. counter1059500300021
HISTORY (19820112A) 003 and 004 combined. New data coded. 1059500300022
(19820426A) BIB corrections. 1059500300023
(19830330U) Data sorted. 1059500300024
(19860825A) Data units corrected. 1059500300025
(20170510A) On. ERR-1 deleted (equivalent to MONIT-ERR)1059500300026
(20201130A) On. MONIT-ERR=1.0 b*eV -> 0.4% 1059500300027
ENDBIB 25 0 1059500300028
COMMON 4 3 1059500300029
EN-NRM-MIN EN-NRM-MAX MONIT MONIT-ERR 1059500300030
EV EV B*EV PER-CENT 1059500300031
7.8 11.0 243.7 0.4 1059500300032
ENDCOMMON 3 0 1059500300033
DATA 8 13 1059500300034
EN-MIN EN-MAX DATA ERR-T ERR-S ERR-2 1059500300035
ERR-3 ERR-4 1059500300036
EV EV B PER-CENT PER-CENT PER-CENT 1059500300037
PER-CENT PER-CENT 1059500300038
7.4 10.0 87.1 1.2 0.8 0.7 1059500300039
0.0 0.0 1059500300040
7.8 11.0 76.2 1.2 0.8 0.7 1059500300041
0.0 0.0 1059500300042
10.0 15.0 44.5 1.3 1.0 0.7 1059500300043
0.0 0.0 1059500300044
10.7 17.6 39.2 1.6 1.4 0.7 1059500300045
0.1 0.0 1059500300046
15.0 20.5 60.0 1.4 1.0 0.7 1059500300047
0.1 0.0 1059500300048
22.0 33.0 35.1 1.4 1.0 0.7 1059500300049
0.2 0.0 1059500300050
22.6 29.0 44.1 1.5 1.2 0.7 1059500300051
0.2 0.0 1059500300052
800. 1000. 7.40 2.9 1.4 2.3 1059500300053
0.5 0.0 1059500300054
1000. 2000. 7.05 1.9 0.8 0.7 1059500300055
0.5 0.0 1059500300056
4000. 5000. 4.06 2.0 1.7 0.7 1059500300057
0.5 0.1 1059500300058
6000. 10000. 3.07 1.6 1.1 0.7 1059500300059
0.6 0.2 1059500300060
10000. 20000. 2.55 1.5 0.9 0.7 1059500300061
0.7 0.5 1059500300062
20000. 30000. 2.16 1.8 1.2 0.7 1059500300063
0.7 0.6 1059500300064
ENDDATA 30 0 1059500300065
ENDSUBENT 64 0 1059500399999
NOSUBENT 10595004 19820408 14321059500400001
SUBENT 10595005 20170510 14321059500500001
BIB 7 16 1059500500002
REACTION (92-U-235(N,F),,SIG,,AV) 1059500500003
METHOD (TOF) 200 m flight path 1059500500004
DETECTOR (PROPC) Hydrogen proportional counter flux monitor 1059500500005
MONITOR ((MONIT)92-U-235(N,F),,SIG) 1059500500006
Normalized to 2.55+/-0.05 b at 10-20 keV, 1059500500007
which is from 243.7+/-1.0 b*eV at 7.8-11.0 eV, 1059500500008
which is from thermal cross section of 583.54 b 1059500500009
(1-H-1(N,EL)1-H-1,,SIG) 1059500500010
Shape normalization from ENDF/B-V 1059500500011
ERR-ANALYS (ERR-S) Statistical uncertainty 1059500500012
(ERR-1) Shape systematic uncertainty 1059500500013
(ERR-T) Total uncertainty 1059500500014
(ERR-2) Normalization uncertainty 1059500500015
STATUS (TABLE) Table A.III of Nucl.Sci.Eng.81(1982)196 1059500500016
(COREL,10595002) Narrower group structure 1059500500017
HISTORY (20170510C) On 1059500500018
ENDBIB 16 0 1059500500019
COMMON 4 3 1059500500020
EN-NRM-MIN EN-NRM-MAX MONIT ERR-2 1059500500021
KEV KEV B PER-CENT 1059500500022
10. 20. 2.55 2.4 1059500500023
ENDCOMMON 3 0 1059500500024
DATA 6 18 1059500500025
EN-MIN EN-MAX DATA ERR-S ERR-1 ERR-T 1059500500026
KEV KEV B PER-CENT PER-CENT PER-CENT 1059500500027
5. 10. 3.403 0.7 1.9 3.1 1059500500028
10. 20. 2.550 0.5 1.5 2.9 1059500500029
20. 30. 2.170 0.8 1.4 2.9 1059500500030
30. 40. 1.994 0.9 1.9 3.2 1059500500031
40. 50. 1.828 0.9 1.3 2.9 1059500500032
50. 60. 1.803 1.0 1.4 3.0 1059500500033
60. 70. 1.733 1.0 1.5 3.0 1059500500034
70. 80. 1.651 1.0 1.6 3.0 1059500500035
80. 90. 1.614 1.0 1.8 3.2 1059500500036
90. 100. 1.614 1.0 1.4 3.0 1059500500037
100. 150. 1.473 0.5 1.5 2.9 1059500500038
150. 200. 1.400 0.5 2.4 3.4 1059500500039
200. 300. 1.259 0.4 1.3 2.8 1059500500040
300. 400. 1.200 0.5 1.3 2.8 1059500500041
400. 500. 1.167 0.5 1.9 3.1 1059500500042
500. 600. 1.130 0.4 2.0 3.1 1059500500043
600. 700. 1.122 0.5 1.9 3.1 1059500500044
700. 800. 1.108 0.5 2.0 3.1 1059500500045
ENDDATA 20 0 1059500500046
ENDSUBENT 45 0 1059500599999
ENDENTRY 5 0 1059599999999