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