ENTRY 13846 20080626 13491384600000001
SUBENT 13846001 20080626 13491384600100001
BIB 15 36 1384600100002
INSTITUTE (1USAORL,1USATEN,1USANIS,1USALAS) 1384600100003
REFERENCE (J,PR/C,65,045801,200204) 1384600100004
AUTHOR (J.C.Blackmon,S.Raman,J.K.Dickens,R.M.Lindstrom, 1384600100005
R.L.Paul,J.E.Lynn) 1384600100006
TITLE Thermal-neutron capture by 208Pb 1384600100007
FACILITY (REAC,1USANIS) Research reaction (NBSR) 1384600100008
INC-SOURCE Cold neutron beam extracted from liquid hydrogen 1384600100009
cold source. 1384600100010
INC-SPECT Cold neutron beam filtered through 12.7 mm of 1384600100011
berylllium and 203-mm-thick single-crystal bismuth. 1384600100012
Beam temperature 1.7 millieV. 1384600100013
SAMPLE 2.318-g radiogenic lead sample; 72.3 atom % 208Pb, 1384600100014
held under vacuum in magnesium alloy chamber. 1384600100015
Sample oriented at 45 degrees to neutron beam. 1384600100016
DETECTOR (GE-IN) High purity germanium detector surrounded by 1384600100017
bismuth germanate (BGO) Compton-suppression detector. 1384600100018
Detector surrounded by 10-cm-thick layer of lead and 1384600100019
6Li-loaded plastic. 1384600100020
MONITOR Detector calibrated using gamma yield from 152Eu 1384600100021
source and from 35Cl(n,gamma)36Cl reaction. 1384600100022
ANALYSIS Determined by assuming that ratio of 208Pb(n,gamma) to 1384600100023
12C(n,gamma) for cold neutrons is the same at thermal 1384600100024
energies. 1384600100025
CORRECTION Corrected for background. 1384600100026
ERR-ANALYS (DATA-ERR) One standard deviation uncertainties, 1384600100027
include uncertainites in: 1384600100028
. relative gamma efficiencies (2-3%), 1384600100029
. in 12C capture cross section (2%), 1384600100030
. statistical uncertainties. 1384600100031
Uncertainty in number of target atoms is negligible. 1384600100032
STATUS (APRVD) Approved by J. Blackmon, 21 November 2002. 1384600100033
Data taken from tables in reference. 1384600100034
HISTORY (20021119C) 1384600100035
(20030828A) Spectrum energy updated. 1384600100036
(20031223A) BIB update; energy update. 1384600100037
(20080626A) BIB update. 1384600100038
ENDBIB 36 0 1384600100039
COMMON 1 3 1384600100040
EN-DUMMY 1384600100041
EV 1384600100042
0.0253 1384600100043
ENDCOMMON 3 0 1384600100044
ENDSUBENT 43 0 1384600199999
SUBENT 13846002 20080626 13491384600200001
BIB 3 7 1384600200002
REACTION (82-PB-208(N,G)82-PB-209,PAR,SIG,,MXW,DERIV) 1384600200003
SAMPLE Composite sample of radiogenic lead (72.3% 208Pb) and 1384600200004
reactor-grade graphite monitor. 1384600200005
MONITOR ((MONIT1)6-C-12(N,G)6-C-13,PAR,SIG) 1384600200006
((MONIT2)6-C-12(N,G)6-C-13,PAR,SIG) 1384600200007
Weighted average of measurement relative to each C 1384600200008
gamma. 1384600200009
ENDBIB 7 0 1384600200010
COMMON 6 3 1384600200011
E-NRM1 MONIT1 MONIT1-ERR E-NRM2 MONIT2 MONIT2-ERR 1384600200012
KEV MB MB KEV MB MB 1384600200013
1262. 1.09 0.02 3684. 1.08 0.02 1384600200014
ENDCOMMON 3 0 1384600200015
DATA 4 7 1384600200016
E E-ERR DATA DATA-ERR 1384600200017
KEV KEV MICRO-B MICRO-B 1384600200018
465.3 0.3 188. 17. 1384600200019
970.5 0.5 21. 9. 1384600200020
1400.3 0.3 21. 4. 1384600200021
1567.1 0.3 230. 12. 1384600200022
1621.5 0.7 21. 13. 1384600200023
1788.3 0.4 54. 11. 1384600200024
1905.7 0.4 78. 13. 1384600200025
ENDDATA 9 0 1384600200026
ENDSUBENT 25 0 1384600299999
SUBENT 13846003 20080626 13491384600300001
BIB 4 5 1384600300002
REACTION (82-PB-208(N,G)82-PB-209,PAR,SIG,,MXW,DERIV) 1384600300003
SAMPLE Radiogenic lead (72.3% 208Pb). 1384600300004
MONITOR (82-PB-208(N,G)82-PB-209,PAR,SIG,,MXW) 1384600300005
Normalized to data for composite sample. 1384600300006
HISTORY (20080626A) Normalization corrected. 1384600300007
ENDBIB 5 0 1384600300008
COMMON 3 3 1384600300009
E-NRM MONIT MONIT-ERR 1384600300010
KEV MB MB 1384600300011
1567.1 230. 12. 1384600300012
ENDCOMMON 3 0 1384600300013
DATA 4 5 1384600300014
E E-ERR DATA DATA-ERR 1384600300015
KEV KEV MICRO-B MICRO-B 1384600300016
465.3 0.3 166. 14. 1384600300017
970.5 0.5 25. 10. 1384600300018
1621.5 0.7 34. 12. 1384600300019
1788.3 0.4 42. 15. 1384600300020
1905.7 0.4 79. 14. 1384600300021
ENDDATA 7 0 1384600300022
ENDSUBENT 21 0 1384600399999
SUBENT 13846004 20080626 13491384600400001
BIB 4 6 1384600400002
REACTION (82-PB-208(N,G)82-PB-209,,SIG,,MXW,DERIV) 1384600400003
SAMPLE Composite sample of radiogenic lead (72.3% 208Pb) and 1384600400004
reactor-grade graphite monitor. 1384600400005
MONITOR (6-C-12(N,G)6-C-13,,SIG) 1384600400006
METHOD Measured intensity of 1567-keV gamma, which represents 1384600400007
100% of captures. 1384600400008
ENDBIB 6 0 1384600400009
NOCOMMON 0 0 1384600400010
DATA 2 1 1384600400011
DATA DATA-ERR 1384600400012
MICRO-B MICRO-B 1384600400013
230. 12. 1384600400014
ENDDATA 3 0 1384600400015
ENDSUBENT 14 0 1384600499999
SUBENT 13846005 20080626 13491384600500001
BIB 5 7 1384600500002
REACTION (82-PB-206(N,G)82-PB-207,,SIG,,MXW,DERIV) 1384600500003
SAMPLE Composite sample of radiogenic lead (72.3% 208Pb) and 1384600500004
reactor-grade graphite monitor. 1384600500005
MONITOR (6-C-12(N,G)6-C-13,,SIG) 1384600500006
METHOD Measured intensity of 6739-keV gamma, which represents 1384600500007
>99% of captures. 1384600500008
HISTORY (20080626A) Reaction corrected. 1384600500009
ENDBIB 7 0 1384600500010
NOCOMMON 0 0 1384600500011
DATA 2 1 1384600500012
DATA DATA-ERR 1384600500013
MB MB 1384600500014
26.6 1.2 1384600500015
ENDDATA 3 0 1384600500016
ENDSUBENT 15 0 1384600599999
SUBENT 13846006 20080626 13491384600600001
BIB 5 7 1384600600002
REACTION (82-PB-207(N,G)82-PB-208,,SIG,,MXW,DERIV) 1384600600003
SAMPLE Composite sample of radiogenic lead (72.3% 208Pb) and 1384600600004
reactor-grade graphite monitor. 1384600600005
MONITOR (6-C-12(N,G)6-C-13,,SIG) 1384600600006
METHOD Measured intensity of 7368-keV gamma, which represents 1384600600007
>99% of captures. 1384600600008
HISTORY (20080626A) Reaction corrected. 1384600600009
ENDBIB 7 0 1384600600010
NOCOMMON 0 0 1384600600011
DATA 2 1 1384600600012
DATA DATA-ERR 1384600600013
MB MB 1384600600014
610. 30. 1384600600015
ENDDATA 3 0 1384600600016
ENDSUBENT 15 0 1384600699999
ENDENTRY 6 0 1384699999999