ENTRY 22988 20220102 23072298800000001 SUBENT 22988001 20220102 23072298800100001 BIB 18 83 2298800100002 TITLE Measurement of scattering cross sections of Pb-nat at 2298800100003 an incident neutron energy of 2.94 MeV 2298800100004 AUTHOR (E.Poenitz, R.Nolte, D.Schmidt) 2298800100005 INSTITUTE (2GERPTB) PTB, Braunschweig, Germany. 2298800100006 REFERENCE (C,2007NICE,1,513,200704) ND2007 report #390. 2298800100007 #doi:10.1051/ndata:07390 2298800100008 Conference Proceedings. 2298800100009 2007NICE Book of Abstracts,page 130,paper #390, 200704.2298800100010 REL-REF (I,,D.Schmidt+,R,PTB-N-27,1996) Details of facility. 2298800100011 (N,,D.Schmidt+,R,PTB-N-40,1998) Code STREUER . 2298800100012 FACILITY (CYCLO,2GERPTB) Cyclotron can be rotated from -20deg 2298800100013 to +110deg with respect to detector. 2298800100014 TOF spectrometer at PTB. 2298800100015 INC-SOURCE (P-N15) N-15(p,n)O-15 reaction as source for monoener- 2298800100016 getic neutrons. Pulsed beam with time width of 0.8 to 2298800100017 2.0 ns. Gas target of 3 cm length, with entrance 2298800100018 window of 5 micron Mo-foil. Distance between center 2298800100019 of gas target and pivot point 17.5cm. 2298800100020 Gas target allows background subtraction by gas-in/ 2298800100021 gas-out difference measurements and easy variation 2298800100022 of target thickness by changing gas pressure 2298800100023 INC-SPECT Energy spread is primary caused by target thickness 2298800100024 (delta-Eg = 0.09MeV )and energy spread of protons beam2298800100025 (delta-Eacc = 0.06MeV FWHM). 2298800100026 METHOD (TOF) Time-of-flight, 12 m flight path of scattered 2298800100027 neutrons. 2298800100028 DETECTOR (SCIN) Six NE213 liquid scintillation detectors: 2298800100029 D1 - 4 inches diameter, 1 inch length, 2298800100030 D2 - D5 10 inches diameter, 2 inches length, 2298800100031 M - neutron fluence monitor detector. 2298800100032 5 detectors D1 to D5 which are always at the same 2298800100033 positions. The distance is always 12.5 deg to the next2298800100034 detector.If the cyclotron is at 25.0 deg with respect 2298800100035 to detector D1, then data at 25.0, 37.5, 50.0, 62.5 2298800100036 and 75.0 deg were measured at the same time. 2298800100037 MONITOR (1-H-1(N,EL)1-H-1,,SIG) 2298800100038 MONIT-REF (,,3,ENDF/B-V,,1978) 2298800100039 ENDF/B-V scat c-s were used for norm (no more details)2298800100040 SAMPLE Located at the pivot point. Full cylinder of 2.502cm 2298800100041 diameter, 5.002 cm height, 278.260 g mass, chemical 2298800100042 purity 99.9%, natural isotopic abundance. 2298800100043 Polyethylene sample of 2.456cm diameter,4.974cm height,2298800100044 22.455g mass, hydrogen mass content 14.30% was used for2298800100045 normalization measurement. 2298800100046 ANALYSIS Iteratively fitting a realistic Monte Carlo simulation 2298800100047 of neutron production, scattering and detection process2298800100048 to measured TOF spectra. Monte Carlo code STREUER was 2298800100049 used for simulation. 2298800100050 (INTAD)Angle-integrated cross sections were obtained by2298800100051 fitting a Legendre polynomial expansion to experimental2298800100052 data using least-squares methods. 2298800100053 ERR-ANALYS (ERR-T) Total error 2298800100054 Cross section uncertainties come from: 2298800100055 (ERR-1) - Normalization, including the uncertainty of 2298800100056 hydrogen content of PE sample, uncertainty of ENDF/B-V 2298800100057 hydrogen scattering cross section and counting 2298800100058 statistics of measurement with PE sample; 2298800100059 - Uncertainty of detector efficiency/energy dependence 2298800100060 of detector efficiency; 2298800100061 - Counting statistics of measurement with Pb sample; 2298800100062 - Uncertainty of multiple scattering correction. 2298800100063 CORRECTION With Monte Carlo simulation, data were corrected for 2298800100064 finite geometry, multiple scattering and flux 2298800100065 attenuation in sample and surrounding air. 2298800100066 The measured TOF spectrum was corrected for 2298800100067 empty-target background and scattering from air and 2298800100068 sample holder. 2298800100069 STATUS (TABLE) Data received from author E.Poenitz 10.01.2008.2298800100070 (APRVD) E.Poenitz, 18.01.2008 . 2298800100071 HISTORY (20080110C) M.M. 2298800100072 (20080609U) M.M. Reference was corrected. 2298800100073 (20081114U) S.M. Reference was corrected. 2298800100074 (20081228A) Keyword ANALYSIS changed to COVARIANCE 2298800100075 in SUBENTs 22988-002, -004, -005, -007, -008, -010, 2298800100076 -011, -013; MISC1 deleted,changed to ERR-T in percent;2298800100077 DATA-ERR changed to ERR-T - S.M. 2298800100078 (20100713U) M.M. DOI was corrected. 2298800100079 (20120113A) S.M. Data superseded by author (R.Nolte) 2298800100080 - New data have smaller uncertainties thanks to 2298800100081 improvements in the data analysis 2298800100082 - New data derived from actual isotopic abundances 2298800100083 of the lead sample measured at PTB 2298800100084 (20220102A) SD: Correection in Subent 010. 2298800100085 ENDBIB 83 0 2298800100086 COMMON 4 3 2298800100087 EN EN-ERR ANG-ERR ERR-1 2298800100088 MEV MEV ADEG PER-CENT 2298800100089 2.94 0.06 0.2 1. 2298800100090 ENDCOMMON 3 0 2298800100091 ENDSUBENT 90 0 2298800199999 SUBENT 22988002 20120113 22312298800200001 BIB 3 16 2298800200002 REACTION (82-PB-0(N,EL)82-PB-0,,DA) Angular distribution of 2298800200003 elastic scattering on Pb-nat. 2298800200004 COVARIANCE Correlation matrix (in %) is symmetric,lower triangle: 2298800200005 100 2298800200006 68 100 2298800200007 66 77 100 2298800200008 29 16 7 100 2298800200009 41 30 22 54 100 2298800200010 43 37 32 42 47 100 2298800200011 50 43 37 49 54 47 100 2298800200012 50 43 37 49 54 47 57 100 2298800200013 49 42 36 48 53 46 57 56 100 2298800200014 49 42 36 47 53 46 57 56 55 100 2298800200015 STATUS (PRELM) PTB preliminary data are presented on Fig.3 of 2298800200016 reference. 2298800200017 (SPSDD,23156004) See explanation in subentry 001 2298800200018 ENDBIB 16 0 2298800200019 NOCOMMON 0 0 2298800200020 DATA 4 10 2298800200021 ANG-CM DATA-CM ERR-T ERR-T 2298800200022 ADEG MB/SR MB/SR PER-CENT 2298800200023 25.10 2959.2 76.9 2.6 2298800200024 37.23 1206.1 36.2 3.0 2298800200025 49.52 281.2 9.8 3.5 2298800200026 62.70 156.6 4.1 2.6 2298800200027 75.08 253.0 6.1 2.4 2298800200028 79.99 257.1 6.9 2.7 2298800200029 92.35 246.3 5.7 2.3 2298800200030 104.84 191.7 4.4 2.3 2298800200031 117.28 162.8 3.9 2.4 2298800200032 129.72 123.2 3.0 2.4 2298800200033 ENDDATA 12 0 2298800200034 ENDSUBENT 33 0 2298800299999 SUBENT 22988003 20120113 22312298800300001 BIB 2 6 2298800300002 REACTION (82-PB-0(N,EL)82-PB-0,,SIG,,SPA) Averaged over the 2298800300003 experimental energy spread, angle-integrated cross 2298800300004 section. 2298800300005 STATUS (PRELM) Preliminary data. 2298800300006 (DEP,22988002) Dependent from angular distribution. 2298800300007 (SPSDD,23156029) See explanation in subentry 001 2298800300008 ENDBIB 6 0 2298800300009 NOCOMMON 0 0 2298800300010 DATA 3 1 2298800300011 DATA ERR-T ERR-T 2298800300012 B B PER-CENT 2298800300013 6.6917 0.1476 2.206 2298800300014 ENDDATA 3 0 2298800300015 ENDSUBENT 14 0 2298800399999 SUBENT 22988004 20120113 22312298800400001 BIB 3 18 2298800400002 REACTION (82-PB-0(N,EL)82-PB-0,,DA,,LEG/RSL) Legendre 2298800400003 coefficients in form 2298800400004 d-Sig/d-Omega=(Sig/4pi)*Sum(1+(2L+1)a(L)p(L)), 2298800400005 where L= from 1 to 6, 2298800400006 Sig=(6691.7+-147.6)mb - angle-integrated cross section.2298800400007 COVARIANCE Correlation matrix (in %) is symmetric,lower triangle: 2298800400008 100 2298800400009 -12 100 2298800400010 53 -22 100 2298800400011 -13 98 -22 100 2298800400012 25 -40 62 -32 100 2298800400013 -23 83 -31 87 -10 100 2298800400014 2 -28 29 -21 79 4 100 2298800400015 STATUS (PRELM) PTB preliminary data (Legendre polynomial fit 2298800400016 curve)are presented on Fig.3 of reference 2298800400017 (DEP,22988002) 2298800400018 (DEP,22988003) 2298800400019 (SPSDD,23156028) See explanation in subentry 001 2298800400020 ENDBIB 18 0 2298800400021 NOCOMMON 0 0 2298800400022 DATA 4 6 2298800400023 NUMBER-CM DATA-CM ERR-T ERR-T 2298800400024 NO-DIM NO-DIM NO-DIM PER-CENT 2298800400025 1. 0.53497 0.01136 2.123 2298800400026 2. 0.46454 0.00401 0.864 2298800400027 3. 0.29697 0.00662 2.229 2298800400028 4. 0.24518 0.00213 0.867 2298800400029 5. 0.09485 0.00238 2.507 2298800400030 6. 0.04871 0.00145 2.980 2298800400031 ENDDATA 8 0 2298800400032 ENDSUBENT 31 0 2298800499999 SUBENT 22988005 20120113 22312298800500001 BIB 4 18 2298800500002 REACTION (82-PB-206(N,INL)82-PB-206,PAR,DA) Angular distribution2298800500003 of inelastic scattering with excitation of 1st level 2298800500004 of Pb-206. 2298800500005 EN-SEC (E-LVL,82-PB-206) 1st exc. level energy. 2298800500006 COVARIANCE Correlation matrix (in %) is symmetric,lower triangle: 2298800500007 100 2298800500008 0 100 2298800500009 1 1 100 2298800500010 1 1 2 100 2298800500011 0 1 1 1 100 2298800500012 0 0 1 1 1 100 2298800500013 1 1 1 1 1 1 100 2298800500014 1 1 2 1 1 1 1 100 2298800500015 1 1 2 1 1 1 1 2 100 2298800500016 1 1 2 2 1 1 1 2 2 100 2298800500017 STATUS (PRELM) PTB preliminary data are presented on Fig.5 of 2298800500018 reference. 2298800500019 (SPSDD,23156012) See explanation in subentry 001 2298800500020 ENDBIB 18 0 2298800500021 COMMON 1 3 2298800500022 E-LVL 2298800500023 KEV 2298800500024 803. 2298800500025 ENDCOMMON 3 0 2298800500026 DATA 4 10 2298800500027 ANG-CM DATA-CM ERR-T ERR-T 2298800500028 ADEG MB/SR MB/SR PER-CENT 2298800500029 25.40 59.0 11.7 19.8 2298800500030 37.73 45.4 7.6 16.6 2298800500031 50.13 50.1 4.8 9.7 2298800500032 62.58 42.9 5.7 13.2 2298800500033 75.05 33.1 4.7 14.1 2298800500034 80.05 35.4 6.1 17.3 2298800500035 92.53 38.9 5.2 13.3 2298800500036 105.00 32.6 3.3 10.1 2298800500037 117.46 32.8 3.7 11.3 2298800500038 129.91 33.9 3.3 9.8 2298800500039 ENDDATA 12 0 2298800500040 ENDSUBENT 39 0 2298800599999 SUBENT 22988006 20120113 22312298800600001 BIB 3 8 2298800600002 REACTION (82-PB-206(N,INL)82-PB-206,PAR,SIG) Angle-integrated 2298800600003 cross section for inelastic scattering with excitation2298800600004 of 1st level of Pb-206. 2298800600005 EN-SEC (E-LVL,82-PB-206) 1st exc. level energy. 2298800600006 STATUS (PRELM) PTB preliminary data are presented on Fig.4 of 2298800600007 reference. 2298800600008 (DEP,22988005) Dependent from angular distribution. 2298800600009 (SPSDD,23156034) See explanation in subentry 001 2298800600010 ENDBIB 8 0 2298800600011 COMMON 1 3 2298800600012 E-LVL 2298800600013 KEV 2298800600014 803. 2298800600015 ENDCOMMON 3 0 2298800600016 DATA 3 1 2298800600017 DATA ERR-T ERR-T 2298800600018 MB MB PER-CENT 2298800600019 492.4 25.6 5.206 2298800600020 ENDDATA 3 0 2298800600021 ENDSUBENT 20 0 2298800699999 SUBENT 22988007 20120113 22312298800700001 BIB 4 15 2298800700002 REACTION (82-PB-206(N,INL)82-PB-206,PAR,DA,,LEG/RSL) Legendre 2298800700003 coefficients in form 2298800700004 d-Sig/d-Omega=(Sig/4pi)*Sum(1+(2L+1)a(L)p(L)), 2298800700005 where L= from 1 to 2, 2298800700006 Sig=( 492.4+- 25.6)mb - angle-integrated cross section.2298800700007 COVARIANCE Correlation matrix (in %) is symmetric,lower triangle: 2298800700008 100 2298800700009 -8 100 2298800700010 37 -22 100 2298800700011 EN-SEC (E-LVL,82-PB-206) 1st exc. level energy. 2298800700012 STATUS (PRELM) PTB preliminary data (Legendre polynomial fit 2298800700013 curve) are presented on Fig.5 of reference. 2298800700014 (DEP,22988005) 2298800700015 (DEP,22988006) 2298800700016 (SPSDD,23156030) See explanation in subentry 001 2298800700017 ENDBIB 15 0 2298800700018 COMMON 1 3 2298800700019 E-LVL 2298800700020 KEV 2298800700021 803. 2298800700022 ENDCOMMON 3 0 2298800700023 DATA 4 2 2298800700024 NUMBER-CM DATA-CM ERR-T ERR-T 2298800700025 NO-DIM NO-DIM NO-DIM PER-CENT 2298800700026 1. 0.08356 0.03076 36.807 2298800700027 2. 0.04997 0.02942 58.878 2298800700028 ENDDATA 4 0 2298800700029 ENDSUBENT 28 0 2298800799999 SUBENT 22988008 20120113 22312298800800001 BIB 4 18 2298800800002 REACTION (82-PB-207(N,INL)82-PB-207,PAR,DA) Angular distribution2298800800003 of inelastic scattering with excitation of 1st level 2298800800004 of Pb-207. 2298800800005 EN-SEC (E-LVL,82-PB-207) 1st exc. level energy. 2298800800006 COVARIANCE Correlation matrix (in %) is symmetric,lower triangle: 2298800800007 100 2298800800008 0 100 2298800800009 1 2 100 2298800800010 0 1 2 100 2298800800011 0 1 2 1 100 2298800800012 0 1 1 1 1 100 2298800800013 0 1 1 1 1 0 100 2298800800014 1 1 2 1 1 1 1 100 2298800800015 0 1 2 1 1 1 1 2 100 2298800800016 0 1 2 1 1 1 1 2 2 100 2298800800017 STATUS (PRELM) PTB preliminary data are presented on Fig.7 of 2298800800018 reference. 2298800800019 (SPSDD,23156022) See explanation in subentry 001 2298800800020 ENDBIB 18 0 2298800800021 COMMON 1 3 2298800800022 E-LVL 2298800800023 KEV 2298800800024 570. 2298800800025 ENDCOMMON 3 0 2298800800026 DATA 4 10 2298800800027 ANG-CM DATA-CM ERR-T ERR-T 2298800800028 ADEG MB/SR MB/SR PER-CENT 2298800800029 25.40 67.7 15.7 23.2 2298800800030 37.72 79.9 9.4 11.7 2298800800031 50.12 68.4 5.9 8.6 2298800800032 62.57 61.4 7.3 11.9 2298800800033 75.02 54.5 6.2 11.4 2298800800034 80.02 49.7 8.6 17.2 2298800800035 92.49 57.3 7.2 12.6 2298800800036 104.97 52.5 5.0 9.4 2298800800037 117.44 56.5 5.8 10.3 2298800800038 129.89 55.0 5.5 10.0 2298800800039 ENDDATA 12 0 2298800800040 ENDSUBENT 39 0 2298800899999 SUBENT 22988009 20120113 22312298800900001 BIB 3 8 2298800900002 REACTION (82-PB-207(N,INL)82-PB-207,PAR,SIG) Angle-integrated 2298800900003 cross section for inelastic scattering with excitation2298800900004 of 1st level of Pb-207. 2298800900005 EN-SEC (E-LVL,82-PB-207) 1st exc. level energy. 2298800900006 STATUS (PRELM) PTB preliminary data are presented on Fig.6 of 2298800900007 reference. 2298800900008 (DEP,22988008) 2298800900009 (SPSDD,23156038) See explanation in subentry 001 2298800900010 ENDBIB 8 0 2298800900011 COMMON 1 3 2298800900012 E-LVL 2298800900013 KEV 2298800900014 570. 2298800900015 ENDCOMMON 3 0 2298800900016 DATA 3 1 2298800900017 DATA ERR-T ERR-T 2298800900018 MB MB PER-CENT 2298800900019 748.2 33.4 4.464 2298800900020 ENDDATA 3 0 2298800900021 ENDSUBENT 20 0 2298800999999 SUBENT 22988010 20220102 23072298801000001 BIB 5 12 2298801000002 REACTION (82-PB-207(N,INL)82-PB-207,PAR,DA,,LEG/RSL) 2298801000003 COVARIANCE Correlation matrix (in %) is symmetric,lower triangle: 2298801000004 100 2298801000005 -26 100 2298801000006 38 -37 100 2298801000007 EN-SEC (E-LVL,82-PB-207) 1st exc. level energy. 2298801000008 STATUS (PRELM) PTB preliminary data (Legendre polynomial fit 2298801000009 curve) are presented on Fig.7 of reference. 2298801000010 (DEP,22988008) 2298801000011 (DEP,22988009) 2298801000012 (SPSDD,23156035) See explanation in subentry 001 2298801000013 HISTORY (20220102A) SD: Value at E-LVL corrected. 2298801000014 ENDBIB 12 0 2298801000015 COMMON 1 3 2298801000016 E-LVL 2298801000017 KEV 2298801000018 570. 2298801000019 ENDCOMMON 3 0 2298801000020 DATA 4 2 2298801000021 NUMBER-CM DATA-CM ERR-T ERR-T 2298801000022 NO-DIM NO-DIM NO-DIM PER-CENT 2298801000023 1. 0.04366 0.02322 53.183 2298801000024 2. 0.04220 0.01951 46.227 2298801000025 ENDDATA 4 0 2298801000026 ENDSUBENT 25 0 2298801099999 SUBENT 22988011 20120113 22312298801100001 BIB 4 18 2298801100002 REACTION (82-PB-207(N,INL)82-PB-207,PAR,DA) Angular distribution2298801100003 of inelastic scattering with excitation of 2nd level 2298801100004 of Pb-207. 2298801100005 EN-SEC (E-LVL,82-PB-207) 2nd exc. level energy. 2298801100006 COVARIANCE Correlation matrix (in %) is symmetric,lower triangle: 2298801100007 100 2298801100008 1 100 2298801100009 0 1 100 2298801100010 0 0 0 100 2298801100011 0 1 0 0 100 2298801100012 0 0 0 0 0 100 2298801100013 0 1 0 0 0 0 100 2298801100014 0 1 1 0 0 0 1 100 2298801100015 1 1 1 0 1 0 1 1 100 2298801100016 1 2 1 1 1 1 1 1 2 100 2298801100017 STATUS (PRELM) PTB preliminary data are presented on Fig.9 of 2298801100018 reference. 2298801100019 (SPSDD,23156025) See explanation in subentry 001 2298801100020 ENDBIB 18 0 2298801100021 COMMON 1 3 2298801100022 E-LVL 2298801100023 KEV 2298801100024 898. 2298801100025 ENDCOMMON 3 0 2298801100026 DATA 4 10 2298801100027 ANG-CM DATA-CM ERR-T ERR-T 2298801100028 ADEG MB/SR MB/SR PER-CENT 2298801100029 25.39 55.7 11.4 20.5 2298801100030 37.71 54.6 7.3 13.4 2298801100031 50.12 35.3 5.4 15.4 2298801100032 62.57 23.2 5.9 25.5 2298801100033 75.05 26.8 4.7 17.6 2298801100034 80.09 26.8 5.8 21.8 2298801100035 92.61 33.4 5.3 15.8 2298801100036 105.11 26.8 3.8 14.2 2298801100037 117.58 37.9 4.7 12.6 2298801100038 130.01 44.8 4.4 9.9 2298801100039 ENDDATA 12 0 2298801100040 ENDSUBENT 39 0 2298801199999 SUBENT 22988012 20120113 22312298801200001 BIB 3 8 2298801200002 REACTION (82-PB-207(N,INL)82-PB-207,PAR,SIG) Angle-integrated 2298801200003 cross section for inelastic scattering with excitation2298801200004 of 2nd level of Pb-207. 2298801200005 EN-SEC (E-LVL,82-PB-207) 2nd exc. level energy. 2298801200006 STATUS (PRELM) PTB preliminary data are presented on Fig.8 of 2298801200007 reference. 2298801200008 (DEP,22988011) Dependent from angular distribution. 2298801200009 (SPSDD,23156038) See explanation in subentry 001 2298801200010 ENDBIB 8 0 2298801200011 COMMON 1 3 2298801200012 E-LVL 2298801200013 KEV 2298801200014 898. 2298801200015 ENDCOMMON 3 0 2298801200016 DATA 3 1 2298801200017 DATA ERR-T ERR-T 2298801200018 MB MB PER-CENT 2298801200019 489.6 31.2 6.384 2298801200020 ENDDATA 3 0 2298801200021 ENDSUBENT 20 0 2298801299999 SUBENT 22988013 20120113 22312298801300001 BIB 4 15 2298801300002 REACTION (82-PB-207(N,INL)82-PB-207,PAR,DA,,LEG/RSL) Legendre 2298801300003 coefficients in form 2298801300004 d-Sig/d-Omega=(Sig/4pi)*Sum(1+(2L+1)a(L)p(L)), 2298801300005 where L= from 1 to 2, 2298801300006 Sig=( 489.6+- 31.2)mb - angle-integrated cross section.2298801300007 COVARIANCE Correlation matrix (in %) is symmetric,lower triangle: 2298801300008 100 2298801300009 0 100 2298801300010 21 -24 100 2298801300011 EN-SEC (E-LVL,82-PB-207) 2nd exc. level energy. 2298801300012 STATUS (PRELM) PTB preliminary data (Legendre polynomial fit 2298801300013 curve) are presented on Fig.9 of reference. 2298801300014 (DEP,22988011) 2298801300015 (DEP,22988012) 2298801300016 (SPSDD,23156036) See explanation in subentry 001 2298801300017 ENDBIB 15 0 2298801300018 COMMON 1 3 2298801300019 E-LVL 2298801300020 KEV 2298801300021 898. 2298801300022 ENDCOMMON 3 0 2298801300023 DATA 4 2 2298801300024 NUMBER-CM DATA-CM ERR-T ERR-T 2298801300025 NO-DIM NO-DIM NO-DIM PER-CENT 2298801300026 1. -0.04494 0.03923 87.285 2298801300027 2. 0.14369 0.03420 23.799 2298801300028 ENDDATA 4 0 2298801300029 ENDSUBENT 28 0 2298801399999 ENDENTRY 13 0 2298899999999