ENTRY 20402 20180819 22702040200000001
SUBENT 20402001 20180819 22702040200100001
BIB 17 43 2040200100002
INSTITUTE (2UK ALD) 2040200100003
REFERENCE (R,AWRE-O-03/71,1971) 2040200100004
AUTHOR (R.E.Coles) 2040200100005
TITLE Elastic and inelastic scattering of 5.0 MeV neutrons 2040200100006
by sodium 2040200100007
FACILITY (VDG,2UK ALD) AWRE 6 MV Van de Graaff accelerator. 2040200100008
INC-SOURCE (P-T) T(p,n)He-3 reaction, tritium gas target. 2040200100009
INC-SPECT (EN-RSL-FW) The incident energy 5.0 MeV, the neutron 2040200100010
energy spread was 25 keV, mainly due to the proton 2040200100011
energy loss in the gas cell and the finite angle 2040200100012
subtended at the target by the scattering sample 2040200100013
SAMPLE .Produced by pouring molten pure Na metal (> 99.5% Na, 2040200100014
remainder mostly O2), in an argon atmosphere, into 2040200100015
a light cylindrical Al can of wall thickness 0.04 cm. 2040200100016
.The enclosed Na sample was 4.5 cm diam., 4.6 cm long 2040200100017
and weighed 71.093 g and was X-rayed to confirm the 2040200100018
absence of voids. 2040200100019
MONITOR (1-H-1(N,EL)1-H-1,,DA) The scattering at 45 deg from 2040200100020
the polythene sample was measured. 2040200100021
MONIT-REF (,A.Horsley,J,ND/A,2,243,1966) 2040200100022
METHOD (TOF) Time of flight, flight path = 1.75 m, the spectra2040200100023
were obtained at ten angles between 30 and 135. degr. 2040200100024
* The well known neutron group energies from 2040200100025
n-scattering of iron were used as time calibration 2040200100026
and a check on incident neutron energy. 2040200100027
DETECTOR (SCIN) Liquid scintillator (NE213) 2040200100028
REL-REF (M,,J.H.Towle+,J,NP/A,118,500,1968) - The neutron 2040200100029
detection system and experimental procedures described2040200100030
(M,20456001,R.E.Coles+,R,AWRE-O-89/70,1970) - methods 2040200100031
of cross sections calculation, corrections for multiple2040200100032
scattering, flux attenuation and finite angular 2040200100033
resolution of the source-scatterer geometry and 2040200100034
error estimation. 2040200100035
ERR-ANALYS (ERR-1) Uncertainty in detector relative efficiency 2040200100036
CORRECTION Corrections for multiple scattering, flux attenuation 2040200100037
were made using the Monte Carlo program MAGGIE. 2040200100038
COMMENT Compiler: Refs for MONITOR and METHOD were taken 2040200100039
from 20456 Entry (see REL-REF). 2040200100040
HISTORY (19710510C) 2040200100041
(20180821A) SD:Updated to new date formats,lower case. 2040200100042
Part of information from MONITOR moved to METHOD. 2040200100043
MONIT-REF, REL-REF were added. CORRECTION moved to 2040200100044
Subent 001. 2040200100045
ENDBIB 43 0 2040200100046
COMMON 3 3 2040200100047
EN EN-RSL-FW ERR-1 2040200100048
MEV MEV PER-CENT 2040200100049
5.0 0.025 3. 2040200100050
ENDCOMMON 3 0 2040200100051
ENDSUBENT 50 0 2040200199999
SUBENT 20402002 20180819 22702040200200001
BIB 6 17 2040200200002
REACTION (11-NA-23(N,EL)11-NA-23,,SIG) 2040200200003
Integrated. 2040200200004
CORRECTION Additional corrections for finite angular resolution 2040200200005
of source-scatterer geometry were made using the 2040200200006
Monte Carlo program MAGGIE. 2040200200007
ERR-ANALYS (ERR-T) The error quoted was obtained by combining in 2040200200008
quadrature this detector efficiency uncertainty with 2040200200009
the error on the a0 term of the fitted Legendre 2040200200010
polynomial. 2040200200011
COMMENT The integral elastic cross section of 875 +- 35 mb 2040200200012
is compared with the data in the present UK nuclear 2040200200013
data file DFN 182 (T.P.Moorhead, AEEW-R254.), i.e. 2040200200014
887 mb. 2040200200015
STATUS (TABLE) Table 1(a) of AWRE-O-03/71. 2040200200016
(DEP,20402004) Legendre polynomial 2040200200017
HISTORY (20180819U) SD: CORRECTION, ERR-ANALYS, STATUS were 2040200200018
updated. DATA-ERR -> ERR-T. PART-DET deleted. 2040200200019
ENDBIB 17 0 2040200200020
NOCOMMON 0 0 2040200200021
DATA 2 1 2040200200022
DATA ERR-T 2040200200023
B B 2040200200024
0.875 0.035 2040200200025
ENDDATA 3 0 2040200200026
ENDSUBENT 25 0 2040200299999
SUBENT 20402003 20180819 22702040200300001
BIB 5 9 2040200300002
REACTION (11-NA-23(N,EL)11-NA-23,,DA) 2040200300003
CORRECTION Additional corrections for finite angular resolution 2040200300004
of source-scatterer geometry were made using the 2040200300005
Monte Carlo program MAGGIE. 2040200300006
ERR-ANALYS (ERR-T) total error. Maximum total error was 4.2%, 2040200300007
including peak statistical errors 2040200300008
STATUS (TABLE) Table 1(a) of AWRE-O-03/71. 2040200300009
HISTORY (20180819U) SD: CORRECTION, ERR-ANALYS, STATUS were 2040200300010
updated. DATA-ERR -> ERR-T. PART-DET deleted. 2040200300011
ENDBIB 9 0 2040200300012
NOCOMMON 0 0 2040200300013
DATA 3 10 2040200300014
COS-CM DATA-CM ERR-T 2040200300015
NO-DIM MB/SR MB/SR 2040200300016
-0.7288 25.8 1.0 2040200300017
-0.5327 27.2 1.1 2040200300018
-0.2997 29.0 1.2 2040200300019
-0.0441 38.0 1.5 2040200300020
0.1307 37.4 1.4 2040200300021
0.3028 40.4 1.6 2040200300022
0.4666 61.4 2.4 2040200300023
0.6165 87.6 3.3 2040200300024
0.7475 148. 6. 2040200300025
0.8548 230. 9. 2040200300026
ENDDATA 12 0 2040200300027
ENDSUBENT 26 0 2040200399999
SUBENT 20402004 20180819 22702040200400001
BIB 4 6 2040200400002
REACTION (11-NA-23(N,EL)11-NA-23,,DA,,LEG) 2040200400003
ERR-ANALYS (DATA-ERR) error due to fitted Legendre polynomial 2040200400004
STATUS (TABLE) Table 1(b) of AWRE-O-03/71. 2040200400005
HISTORY (20180819U) SD: ERR-ANALYS, STATUS were updated. 2040200400006
PART-DET deleted. CORRECTION moved to Subent 001. 2040200400007
NUMBER -> NUMBER-CM; DATA -> DATA-CM. 2040200400008
ENDBIB 6 0 2040200400009
NOCOMMON 0 0 2040200400010
DATA 3 6 2040200400011
NUMBER-CM DATA-CM DATA-ERR 2040200400012
NO-DIM MB/SR MB/SR 2040200400013
0. 69.7 1.8 2040200400014
1. 97.8 4.6 2040200400015
2. 100.4 6.0 2040200400016
3. 74.1 6.6 2040200400017
4. 44.6 5.5 2040200400018
5. 14.1 4.1 2040200400019
ENDDATA 8 0 2040200400020
ENDSUBENT 19 0 2040200499999
SUBENT 20402005 20180819 22702040200500001
BIB 5 20 2040200500002
REACTION (11-NA-23(N,INL)11-NA-23,PAR,SIG) 2040200500003
integrated 2040200500004
ANALYSIS (4PI1A) 2040200500005
The 439 keV level is considerably interfered 2040200500006
with by the elastic peak. But a shape for elastic peak2040200500007
can be subtracted from the full spectrum to leave the 2040200500008
inelastic spectrum. 2040200500009
ERR-ANALYS (ERR-T) Total error in extracting individual inelastic 2040200500010
peak areas, was estimated to be 5 or 7% in the peak 2040200500011
area. 2040200500012
.Since inelastic angular distributions were isotropic, 2040200500013
the integrated cross sections were taken as 4pi times 2040200500014
the means of the measured differential cross sections,2040200500015
each weighted according to its error, and errors 2040200500016
quoted on inelastic integrated cross sections are the 2040200500017
standard deviation of these means. 2040200500018
STATUS (TABLE) Table 2 of AWRE-O-03/71. 2040200500019
HISTORY (20180819U) SD: ERR-ANALYS, STATUS were updated. 2040200500020
DATA-ERR -> ERR-T. PART-DET deleted. CORRECTION moved 2040200500021
to Subent 001. 2040200500022
ENDBIB 20 0 2040200500023
NOCOMMON 0 0 2040200500024
DATA 3 7 2040200500025
E-LVL DATA ERR-T 2040200500026
MEV B B 2040200500027
0.439 0.240 0.016 2040200500028
2.08 0.105 0.007 2040200500029
2.39 0.038 0.004 2040200500030
2.68 0.110 0.011 2040200500031
2.98 0.100 0.009 2040200500032
3.68 0.087 0.009 2040200500033
3.88 0.125 0.013 2040200500034
ENDDATA 9 0 2040200500035
ENDSUBENT 34 0 2040200599999
SUBENT 20402006 20180819 22702040200600001
BIB 5 17 2040200600002
REACTION (11-NA-23(N,INL)11-NA-23,,SIG) total inelastic 2040200600003
COMMENT .The total inelastic cross section of 805 +- 53 mb 2040200600004
is compared with the data in the present UK nuclear 2040200600005
data file DFN 182 (T.P.Moorhead, AEEW-R254.), i.e. 2040200600006
870 mb. 2040200600007
ERR-ANALYS (ERR-T) Errors are one standard deviation. 2040200600008
.Since inelastic angular distributions were isotropic, 2040200600009
the integrated cross sections were taken as 4pi times 2040200600010
the means of the measured differential cross sections,2040200600011
each weighted according to its error, and errors 2040200600012
quoted on inelastic integrated cross sections are the 2040200600013
standard deviation of these means. 2040200600014
STATUS (TABLE) From p.5 of AWRE-O-03/71. 2040200600015
(DEP,20402005) Partial cr.sect. 2040200600016
HISTORY (20180819U) SD: ERR-ANALYS, STATUS were updated. 2040200600017
DATA-ERR -> ERR-T. PART-DET deleted. CORRECTION 2040200600018
moved to Subent 001. 2040200600019
ENDBIB 17 0 2040200600020
NOCOMMON 0 0 2040200600021
DATA 2 1 2040200600022
DATA ERR-T 2040200600023
B B 2040200600024
0.805 0.053 2040200600025
ENDDATA 3 0 2040200600026
ENDSUBENT 25 0 2040200699999
ENDENTRY 6 0 2040299999999