SUBENT 20416001 20230201 20231011 2041600100001
BIB 16 180 2041600100002
TITLE Status of (n,xn) cross section measurements 2041600100003
at Bruyeres-le-Chatel 2041600100004
AUTHOR (J.Frehaut,A.Bertin,R.Bois,J.Jary,G.Mosinski) 2041600100005
REFERENCE (R,CEA-R-6447,2016) Revised data. In French . 2041600100006
((S,INDC(USA)-84,(1),399,1980)= 2041600100007
(S,BNL-NCS-51245,(1),399,1980)) 2041600100008
Full paper of contribution to Symposium on Neutron 2041600100009
Cross Sections from 10-50 MeV, held at Upton, 2041600100010
L.I.(U.S.A.), May, 12-14,1980, supersedes all 2041600100011
former publications. 2041600100012
(C,75KIEV,4,303,1975) - In French, Tables of 2041600100013
preliminary n,2n c-s for Sc45,Fe56,Co59,Se76,78,80,82,2041600100014
Y89,Nb93,Rh103 2041600100015
(C,75WASH,2,855,1975) Preliminary, Tables and Graphs 2041600100016
(C,75GAUSSIG,,24,1975) X-sect. plotted and tabulated. 2041600100017
(R,CEA-R-4627,1974) Details on the experiment. 2041600100018
Cross-sections given there are superseded. 2041600100019
INSTITUTE (2FR BRC) Service De Physique Neutronique Et 2041600100020
Nucleaire. 2041600100021
REL-REF (M,,J.Poitou+,J,NIM,114,113,1974) 2041600100022
Monte-Carlo simulation 2041600100023
(O,21568001,J.Frehaut,R,CEA-R-6447,201611) 2041600100024
U-235, U-238 (n,2n) cross section 2041600100025
(O,21669001,J.Frehaut,R,CEA-R-6447,201611) 2041600100026
C-13 n,2n cross section 2041600100027
(O,21971001,J.Frehaut,R,CEA-R-6447,201611) 2041600100028
1-H-2 n,2n cross section. 2041600100029
FACILITY (VDG,2FR BRC) Van De Graaff, 14 MeV. 2041600100030
INC-SOURCE (D-D) Deuteron-deuterium reaction in a 10 cm long 2041600100031
gaseous target containing deuterium at 1 atm. 2041600100032
DETECTOR (STANK) Large Gd-loaded liquid scintillator. 2041600100033
76cm diameter. Equipped by 12 photomultipliers. 2041600100034
Detector efficiency was calibrated using a 252-Cf 2041600100035
source assuming a value of NU=3.732 and Maxwellian 2041600100036
spectrum temperature 1.43 MeV. 2041600100037
Neutron detection efficiency as function of energy 2041600100038
was estimated by Monte Carlo calculations . 2041600100039
The efficiency energy dependence was smoothed as 2041600100040
80.2+1.5601*E-2.2113*E**2+0.335*E**3-0.01629*E**4 2041600100041
En,MeV Efficiency smoothed,% Efficiency ,% 2041600100042
0.25 80.00 79.90 2041600100043
0.50 79.80 77.90 2041600100044
0.75 79.60 79.20 2041600100045
1.00 79.30 80.70 2041600100046
1.25 78.90 79.30 2041600100047
1.50 78.40 79.30 2041600100048
1.75 77.70 77.10 2041600100049
2.00 76.90 77.20 2041600100050
2.25 75.90 73.10 2041600100051
2.50 74.90 71.90 2041600100052
2.75 73.80 75.70 2041600100053
3.00 72.70 74.30 2041600100054
3.25 71.40 71.80 2041600100055
3.50 70.30 70.10 2041600100056
3.75 69.30 70.40 2041600100057
4.00 68.40 68.50 2041600100058
4.25 67.40 70.20 2041600100059
4.50 66.40 66.60 2041600100060
4.75 65.40 63.20 2041600100061
5.00 64.60 64.60 2041600100062
5.25 63.70 64.80 2041600100063
5.50 62.90 61.70 2041600100064
5.75 62.10 63.20 2041600100065
6.00 61.30 60.60 2041600100066
6.25 60.60 61.40 2041600100067
6.50 59.90 59.20 2041600100068
6.75 59.30 56.00 2041600100069
7.00 58.80 56.40 2041600100070
7.25 58.20 57.70 2041600100071
7.50 57.50 59.20 2041600100072
7.75 56.80 58.20 2041600100073
8.00 56.00 56.90 2041600100074
8.25 55.20 56.50 2041600100075
8.50 54.20 51.00 2041600100076
8.75 53.30 51.00 2041600100077
9.00 52.30 53.90 2041600100078
9.25 51.30 51.00 2041600100079
9.50 50.20 49.80 2041600100080
9.75 49.90 50.30 2041600100081
10.00 49.50 49.90 2041600100082
SAMPLE Natural elements Ti,V,Cr,Fe,Cu,Ga,Zr,Mo,W,Pt 2041600100083
and Pb. 2041600100084
Monoisotopic natural elements Sc,Co,Y,Nb,Rh,Tm, 2041600100085
Au, and Bi, (and Lu and Ta). 2041600100086
Separated isotopes for the even isotopes of Se,Nd, 2041600100087
Sm,Eu-151, and the main isotopes of Gd,W,Tl and 2041600100088
Pb, and For U-238. 2041600100089
Lu-175 and Ta-181 are only the major components of 2041600100090
the natural elements. 2041600100091
Calculation by S.Pearlstein, Nuclear Data B, 2041600100092
Section A, 3(1967) used for correcting Se-74 and 2041600100093
Se-77 contributions and to derive (n,2n) cross- 2041600100094
sections of Fe-56 and Lu-175. 2041600100095
About 15 gram. disks of 25 mm diam. Metallic 2041600100096
samples except for separated isotopes of Se, Sm, 2041600100097
Nd and Gd, which were oxides. 2041600100098
MONITOR (92-U-238(N,F),,SIG) MONIT-REFs in data Subents. 2041600100099
Sowerby Standard2007 Ratio 2041600100100
En,MeV Cross-section,barn No-dim. 2041600100101
1. 0.0121 0.01355 1.1240 2041600100102
1.2 0.0393 0.0336 0.8555 2041600100103
1.4 0.129 0.1912 1.4806 2041600100104
1.6 0.372 0.4233 1.1379 2041600100105
1.8 0.487 0.4839 0.9938 2041600100106
2. 0.522 0.5340 1.0230 2041600100107
2.2 0.525 0.5471 1.0421 2041600100108
2.4 0.515 0.5463 1.0608 2041600100109
2.6 0.507 0.5411 1.0673 2041600100110
2.8 0.503 0.5372 1.0680 2041600100111
3. 0.502 0.5237 1.0432 2041600100112
3.5 0.506 0.5430 1.0731 2041600100113
4. 0.512 0.5544 1.0828 2041600100114
4.5 0.513 0.5593 1.0903 2041600100115
5. 0.514 0.5467 1.0636 2041600100116
5.5 0.54 0.5463 1.0117 2041600100117
6. 0.613 0.6108 0.9964 2041600100118
6.5 0.753 0.8158 1.0834 2041600100119
7. 0.874 0.9387 1.0740 2041600100120
8. 0.956 1.0111 1.0576 2041600100121
9. 0.963 1.0094 1.0482 2041600100122
10. 0.952 1.0013 1.0518 2041600100123
11. 0.954 1.0019 1.0502 2041600100124
12. 0.966 0.9850 1.0197 2041600100125
13. 1.008 1.0151 1.0070 2041600100126
14. 1.126 1.1434 1.0155 2041600100127
15. 1.238 1.2346 0.9973 2041600100128
ASSUMED (ASSUM,98-CF-252(0,F),PR,NU) 2041600100129
ANALYSIS Determination of the neutron multiplicity 2041600100130
distribution for the detected events. 2041600100131
CORRECTION Background correction. 2041600100132
For dead time losses. 2041600100133
Efficiency correction for difference of Cf252 fission 2041600100134
neutron and (n,2n) neutron spectra. 2041600100135
Multiple event correction. 2041600100136
For events not induced in sample. 2041600100137
For (n,2n) reactions induced by non-monoenergetic 2041600100138
neutrons. 2041600100139
Correction in the flux measurement. 2041600100140
For the effect of (n,2n) reaction in the axial tube 2041600100141
of scintillator tank - estimated to be negligible. 2041600100142
For reactions induced by degraded neutrons ( -3%) 2041600100143
and loss of secondary neutrons in sample ( +0.5%) . 2041600100144
COMMENT The direct detection technique of emitted neutrons 2041600100145
used in this experiment is not limited to nuclei 2041600100146
with suitable activity characteristics of 2041600100147
residual isotopes as it is the case for activation 2041600100148
measurements. 2041600100149
CRITIQUE H.Vonach et al., Nucl.Sci.Eng. 106(1990)409 corrected 2041600100150
data published in J.Frehaut et al., INDC(USA)-84, p.3992041600100151
(1980) with a normalization factor of 1.078 (agreed 2041600100152
with Frehaut). Data compiled in this EXFOR Entry 2041600100153
(Subents 002-062) are original ones not corrected by 2041600100154
this factor. 2041600100155
HISTORY (19750728C) 2041600100156
(19800603A) G.C. REACTION strings converted, 2041600100157
data updated with the Upton Conference Paper. 2041600100158
(19831122A) SUBWORK 005 deleted, as Ni-data were with- 2041600100159
drawn before the Washington Conference 1975. 2041600100160
(20041212U) HH 2041600100161
(20090901U) M.M. Page and volume numbers were added in 2041600100162
reference C,75KIEV. Author name G.Mosinski was added 2041600100163
from C,75KIEV. Page was added in C,75GAUSSIG. 2041600100164
MONIT-REF, ASSUM, COMMON were added. 2041600100165
(20121207A) SD: CRITIQUE was added. Ref. on private 2041600100166
comm. was changed on (S,INDC(USA)-84,1,399,1980)= 2041600100167
(S,BNL-NCS-51245,1,399,1980). Page was added to 2041600100168
C,75WASH; page was corrected in C,75GAUSSIG. Data 2041600100169
values were corrected in Subents 002-004,006-022, 2041600100170
030,043,050, units were changed. 2041600100171
(20170228A) M.M. 2041600100172
Upper -> lower case corrections in Subents 023-062. 2041600100173
Ref.R,CEA-R-6447,201611 was added. 2041600100174
Subents ( 063-123 ) were added . 2041600100175
Initial data were superseded by revised data. 2041600100176
Subent 005 was deleted: 2041600100177
1983-11-22 Data ( Ni-0(n,2n) CS) were never presented 2041600100178
at the Washington Conference (line in this Subent 005)2041600100179
(20230201U) SD: CEA-R-6447 moved on te first place. 2041600100180
(all active datasets (except for 003 and 040) are 2041600100181
taken from this report). 2041600100182
ENDBIB 180 0 2041600100183
COMMON 1 3 2041600100184
ASSUM 2041600100185
PRT/FIS 2041600100186
3.732 2041600100187
ENDCOMMON 3 0 2041600100188
ENDSUBENT 187 0 2041600199999
SUBENT 20416009 20170228 22592041600900001
BIB 5 18 2041600900002
REACTION (34-SE-80(N,2N)34-SE-79,,SIG) 2041600900003
MONIT-REF (,M.G.Sowerby+,R,AERE-R-72/73,1973) 2041600900004
ERR-ANALYS (DATA-ERR) Errors given are standard errors derived by 2041600900005
quadratic addition of the statistical errors of the 2041600900006
experimental data and the errors of the correction. 2041600900007
.Uncertainties of Cf-252(NU-BAR) and U-238-fission 2041600900008
cross-sections are not included. 2041600900009
STATUS (TABLE) .Table 5 of INDC(USA)-84,1,399 2041600900010
(SPSDD,20416085) Superseded by revised data. 2041600900011
HISTORY (19800603A) G.C. REACTION string converted. 2041600900012
Data updated. 2041600900013
(19800612E) 2041600900014
(19860305A)N.CH 2041600900015
(19860411E) 2041600900016
(20121207A) SD: Values from EN-RSL was divided by 1000,2041600900017
units were changed KEV -> MEV 2041600900018
(20170228) M.M. Initial data were superseded by 2041600900019
revised data. 2041600900020
ENDBIB 18 0 2041600900021
NOCOMMON 0 0 2041600900022
DATA 5 10 2041600900023
EN EN-RSL-HW MONIT DATA DATA-ERR 2041600900024
MEV MEV MB MB MB 2041600900025
10.42 0.100 948. 56. 5. 2041600900026
10.91 0.095 952. 219. 14. 2041600900027
11.40 0.090 957. 391. 24. 2041600900028
11.88 0.085 965. 547. 36. 2041600900029
12.36 0.085 978. 734. 61. 2041600900030
12.85 0.080 999. 823. 67. 2041600900031
13.33 0.075 1031. 922. 73. 2041600900032
13.80 0.075 1086. 1023. 81. 2041600900033
14.28 0.070 1163. 1008. 79. 2041600900034
14.76 0.065 1216. 1043. 82. 2041600900035
ENDDATA 12 0 2041600900036
ENDSUBENT 35 0 2041600999999