ENTRY 21899 20161102 22552189900000001 SUBENT 21899001 20161102 22552189900100001 BIB 15 109 2189900100002 INSTITUTE (2GERKFK) F.K.,K.W. Experimental site 2189900100003 (2ITYBOL) G.R.,A.M. 2189900100004 .Denison University,Granville,Ohio R.R.W. 2189900100005 REFERENCE (J,AJ,300,41,1986) 2189900100006 ((P,NEANDC(E)-242U,8,198306)= 2189900100007 (P,INDC(GER)-25/L,8,1983)) 2189900100008 Prelim. MACS for Sm-148,149,150 AT kT=30keV in Table .2189900100009 AUTHOR (R.R.Winters,F.Kaeppeler,K.Wisshak,A.Mengoni,G.Reffo) 2189900100010 TITLE Sm-148,150: a test for s-process nucleosynthesis 2189900100011 REL-REF (I,21808001,J.Almeida,R,KFK-3347,1982) 2189900100012 (I,,J.Almeida+,J,AJ,265,417,1983) 2189900100013 (M,21831001,F.Kaeppeler+,J,NSE,84,234,1983) 2189900100014 Details of measurement 2189900100015 FACILITY (VDG,2GERKFK) 3.75 MV Van de Graaff. 2189900100016 INC-SOURCE (P-LI7) 2 mg/cm2 thick layer of metallic Li evaporated 2189900100017 on 0.3mm thick tantalum backings. Cooled by water. 2189900100018 Proton beam pulse width - 700 ps. 2189900100019 Proton energies,keV 1900 1925 2020 2189900100020 Neutron spectra region,keV 4-80 4-125 4-250 2189900100021 Repetition rate, MHz 0.5 1.0,0.5 0.5 2189900100022 Beam intensity, microA 4.5 8.0,4.5 4.5 2189900100023 METHOD (TOF) Flight path 61.06+-0.06 cm ; 2189900100024 total time resolution 1.2 nsec , 2189900100025 neutron energy resolution 2. nsec/m . 2189900100026 (PHD) 2189900100027 Pulse height and time-of-flight for both detectors 2189900100028 were stored in 16 x 1024-channel two-dimensional data 2189900100029 files. 2189900100030 (COINC) Coincidence between two detectors - to 2189900100031 estimate the uncertainty due to pileup events. 2189900100032 Cyclic measurement in 5 runs: 2189900100033 I II III IV V 2189900100034 Number of cycles 96 90 96 49 80 2189900100035 Measuring time,hr/sample 18 16 16 10 17 2189900100036 Repetition rate,MHz 1 0.5 0.5 0.5 0.5 2189900100037 Neutron spectrum,keV 2-125 2-125 20-250 20-250 2-802189900100038 Samples : 2189900100039 run I - 148Sm, 149Sm, 150Sm(2) 2189900100040 run II - 148Sm, 149Sm, 150Sm(2), 150Sm(1) 2189900100041 run III - 148Sm, 149Sm, 150Sm(2), 150Sm(1) 2189900100042 run IV - 148Sm, 197Au(2), 150Sm(2), 150Sm(1) 2189900100043 run V - 148Sm 2189900100044 197Au(1), carbon and empty plastic bag samples were 2189900100045 used in each run. 2189900100046 Total measuring time - 22 days ( including 2189900100047 calibration - 17 pulse height of the C6D6 detectors an2189900100048 17 of the TOF scale). 2189900100049 DETECTOR (SCIN) Two cylindrical C6D6 detectors, each containing 2189900100050 1 liter of NE230, 115 mm diameter,96mm height - to 2189900100051 detect the capture gamma-rays. 2189900100052 Located 2.5cm from the center of the sample at 90 deg 2189900100053 to the beam direction. 2189900100054 (GLASD) Li-6 glass detector to monitor neutron beam. 2189900100055 SAMPLE Au - metal, to measure integrated neutron flux; 2189900100056 carbon - graphite, to simulate background from 2189900100057 sample-scattered neutrons; 2189900100058 empty plastic bag, to measure sample-independent 2189900100059 background; 2189900100060 Sm - Sm(2)O(3), enriched . 2189900100061 All samples of 20mm diameter. 2189900100062 Sample mass Plastic bag mass Thickness 2189900100063 g mg mm 10**-3ar/b 2189900100064 Au(1) 5.9580 9.4 1.00 5.7982 2189900100065 Au(2) 2.8700 9.3 0.50 2.7930 2189900100066 Carbon 1.1024 8.9 2.00 17.6120 2189900100067 148Sm 5.4165 10.4 2.70 5.8245 2189900100068 149Sm 2.8843 9.2 1.35 3.1233 2189900100069 150Sm(1) 2.7016 8.0 1.25 2.8421 2189900100070 150Sm(2) 5.5015 10.1 2.75 5.7875 2189900100071 Sm samples contents: 2189900100072 CORRECTION -For pile-up background. 2189900100073 -For time-dependent, sample-independent background 2189900100074 ( measured with empty bag to be about 30% of counts 2189900100075 at En=30 keV ). 2189900100076 -For sample-dependent background (measured by carbon 2189900100077 sample) at En=30 keV - 6% of counts for 148Sm and 2189900100078 12% for 150Sm(2). 2189900100079 -For multiple scattering and beam attenuation (Mi facto2189900100080 and for gamma-ray attenuation (Agamma): 2189900100081 Sample Mi ( at 20 keV) Agamma 2189900100082 197Au(1) 1.06 0.94 2189900100083 197Au(2) 1.04 0.97 2189900100084 148Sm 1.04 0.95 2189900100085 149Sm 1.07 0.97 2189900100086 150Sm(1) 1.04 0.97 2189900100087 150Sm(2) 1.05 0.95 2189900100088 -For isotopic impurities - using 2189900100089 the cross sections ratio 147Sm/149Sm (see ASSUMED); 2189900100090 cross section value for even Sm isotopes (144,152, 2189900100091 154) as /2 ; 2189900100092 composition matrix Cij: 2189900100093 96.80 3.62 0.51 2189900100094 0.78 98.10 0.59 2189900100095 1.54 3.00 96.46 2189900100096 Cij - for i or j =1 the biding energy-weighted number 2189900100097 fractions for 148+half the contribution from 144,152,152189900100098 for i or j =2 represents the same for 147 and 149; 2189900100099 for i or j =3 represents the same for 150+half the 2189900100100 contribution from 144,152,154. 2189900100101 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 2189900100102 Normalization to Au ENDF/B-V cross section. 2189900100103 MONIT-REF (,,3,ENDF/B-V,,1979) 2189900100104 ASSUMED (ASSUM,(62-SM-147(N,G)62-SM-148,,SIG)/ 2189900100105 (62-SM-149(N,G)62-SM-150,,SIG)) 2189900100106 Ratio used in correction for isotopic impurities. 2189900100107 HISTORY (19840704C)BL 2189900100108 (19840710E) 2189900100109 (20161102A) M.M. Ref. J,AJ,300,41,1985 was added. 2189900100110 Entry was re-compiled according to J,AJ,300,41,1985 . 2189900100111 ENDBIB 109 0 2189900100112 COMMON 1 3 2189900100113 ASSUM 2189900100114 NO-DIM 2189900100115 0.75 2189900100116 ENDCOMMON 3 0 2189900100117 ENDSUBENT 116 0 2189900199999 SUBENT 21899002 20161102 22552189900200001 BIB 6 16 2189900200002 REACTION (62-SM-148(N,G)62-SM-149,,SIG,,MXW) MACS 2189900200003 SAMPLE Sample contents : 2189900200004 Sm-144 < 0.05%, Sm-147 - 1.28%, Sm-148 - 96.49%, 2189900200005 Sm-149 - 1.40%, Sm-150 - 0.25%, Sm-152 - 0.34%, 2189900200006 Sm-154 - 0.19%; 2189900200007 other rare earth (% by mass) - 0.51; 2189900200008 other elements (% by mass) - 0.96 . 2189900200009 ERR-ANALYS (DATA-ERR) Total uncertainty. 2189900200010 ANALYSIS To extrapolate CS below minimum energy ( ~ 4keV) of 2189900200011 this experiment down to ~0.5 keV, the strength function2189900200012 model was used. 2189900200013 STATUS (TABLE) Table 8 of J,AJ,300,41,1985 . 2189900200014 In Table 1 of P,NEANDC(E)-242U,8,1983 - 269.+-12. 2189900200015 (DEP,21899005) In .005- directly measured cross section2189900200016 HISTORY (19840704C) 2189900200017 (19840710E) 2189900200018 ENDBIB 16 0 2189900200019 NOCOMMON 0 0 2189900200020 DATA 3 5 2189900200021 KT DATA DATA-ERR 2189900200022 KEV MB MB 2189900200023 10. 522. 26. 2189900200024 20. 339. 16. 2189900200025 30. 277. 13. 2189900200026 50. 225. 10. 2189900200027 100. 174. 8. 2189900200028 ENDDATA 7 0 2189900200029 ENDSUBENT 28 0 2189900299999 SUBENT 21899003 20161102 22552189900300001 BIB 5 13 2189900300002 REACTION (62-SM-149(N,G)62-SM-150,,SIG,,MXW) MACS 2189900300003 SAMPLE Sample contents : 2189900300004 Sm-144 < 0.05%, Sm-147 - 0.37%, Sm-148 - 0.77 %, 2189900300005 Sm-149 - 97.72%, Sm-150 - 0.55%, Sm-152 - 0.38%, 2189900300006 Sm-154 - 0.17%; 2189900300007 other rare earth (% by mass) - 0.56; 2189900300008 other elements (% by mass) - 1.18 . 2189900300009 ERR-ANALYS (DATA-ERR) Total uncertainty 2189900300010 STATUS (TABLE) Table 8 of J,AJ,300,41,1985 . 2189900300011 In Table 1 of P,NEANDC(E)-242U,8,1983 - 1489.+-65. 2189900300012 (DEP,21899006) In .006- directly measured cross section2189900300013 HISTORY (19840704C) 2189900300014 (19840710E) 2189900300015 ENDBIB 13 0 2189900300016 NOCOMMON 0 0 2189900300017 DATA 3 5 2189900300018 KT DATA DATA-ERR 2189900300019 KEV MB MB 2189900300020 10. 2962. 142. 2189900300021 20. 1929. 89. 2189900300022 30. 1511. 70. 2189900300023 50. 1136. 52. 2189900300024 100. 794. 36. 2189900300025 ENDDATA 7 0 2189900300026 ENDSUBENT 25 0 2189900399999 SUBENT 21899004 20161102 22552189900400001 BIB 5 13 2189900400002 REACTION (62-SM-150(N,G)62-SM-151,,SIG,,MXW) MACS 2189900400003 SAMPLE Sample contents : 2189900400004 Sm-144 < 0.05%, Sm-147 - 0.39%, Sm-148 - 0.47 %, 2189900400005 Sm-149 - 1.70%, Sm-150 - 95.48%, Sm-152 - 1.46%, 2189900400006 Sm-154 - 0.45%; 2189900400007 other rare earth (% by mass) - 0.55; 2189900400008 other elements (% by mass) - 1.18 . 2189900400009 ERR-ANALYS (DATA-ERR) Total uncertainty 2189900400010 STATUS (TABLE) Table 8 of J,AJ,300,41,1985 . 2189900400011 In Table 1 of P,NEANDC(E)-242U,8,1983 - 458.+-18. 2189900400012 (DEP,21899007) In .007- directly measured cross section2189900400013 HISTORY (19840704C) 2189900400014 (19840710E) 2189900400015 ENDBIB 13 0 2189900400016 NOCOMMON 0 0 2189900400017 DATA 3 5 2189900400018 KT DATA DATA-ERR 2189900400019 KEV MB MB 2189900400020 10. 825. 38. 2189900400021 20. 558. 24. 2189900400022 30. 465. 28. 2189900400023 50. 389. 16. 2189900400024 100. 314. 14. 2189900400025 ENDDATA 7 0 2189900400026 ENDSUBENT 25 0 2189900499999 SUBENT 21899005 20161102 22552189900500001 BIB 6 24 2189900500002 REACTION (62-SM-148(N,G)62-SM-149,,SIG) 2189900500003 SAMPLE Sample contents : 2189900500004 Sm-144 < 0.05%, Sm-147 - 1.28%, Sm-148 - 96.49%, 2189900500005 Sm-149 - 1.40%, Sm-150 - 0.25%, Sm-152 - 0.34%, 2189900500006 Sm-154 - 0.19%; 2189900500007 other rare earth (% by mass) - 0.51; 2189900500008 other elements (% by mass) - 0.96 . 2189900500009 ERR-ANALYS (ERR-T) Total uncertainty 4.5 % 2189900500010 Source of uncertainty: 2189900500011 (ERR-1) Isotopic decomposition 2189900500012 (ERR-2) Background correction 2189900500013 (ERR-3,,2.) Finite sample correction 2189900500014 (ERR-4) Gamma ray attenuation 2189900500015 (ERR-5) Pulse height weighting 2189900500016 (ERR-6) Pile-up events 2189900500017 (ERR-7) Normalization 2189900500018 Sample mass is given as 0. value . 2189900500019 REL-REF (A,40520008,V.N.Kononov+,J,SNP,27,5,1978) 2189900500020 (A,12095004,R.L.Macklin+,J,NAT,197,369,1963) 2189900500021 STATUS (TABLE) Table 7 of J,AJ,300,41,1985- data for selective2189900500022 three representative energies. 2189900500023 Whole set of measured cross section is in 2189900500024 Winters+,R,KFK-3827,1984 ( not available yet) 2189900500025 HISTORY (20161102C) M.M. Subent was added. 2189900500026 ENDBIB 24 0 2189900500027 COMMON 6 3 2189900500028 ERR-1 ERR-2 ERR-4 ERR-5 ERR-6 ERR-7 2189900500029 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2189900500030 1.3 1.5 1.0 2.0 1.0 2.5 2189900500031 ENDCOMMON 3 0 2189900500032 DATA 3 3 2189900500033 EN DATA ERR-T 2189900500034 KEV MB MB 2189900500035 10. 533. 58. 2189900500036 30. 229. 8. 2189900500037 100. 169. 3. 2189900500038 ENDDATA 5 0 2189900500039 ENDSUBENT 38 0 2189900599999 SUBENT 21899006 20161102 22552189900600001 BIB 6 25 2189900600002 REACTION (62-SM-149(N,G)62-SM-150,,SIG) 2189900600003 SAMPLE Sample contents : 2189900600004 Sm-144 < 0.05%, Sm-147 - 0.37%, Sm-148 - 0.77 %, 2189900600005 Sm-149 - 97.72%, Sm-150 - 0.55%, Sm-152 - 0.38%, 2189900600006 Sm-154 - 0.17%; 2189900600007 other rare earth (% by mass) - 0.56; 2189900600008 other elements (% by mass) - 1.18 . 2189900600009 ERR-ANALYS (ERR-T) Total uncertainty 4.6% 2189900600010 Source of uncertainty: 2189900600011 (ERR-1) Isotopic decomposition 2189900600012 (ERR-2) Background correction 2189900600013 (ERR-3,,2.) Finite sample correction 2189900600014 (ERR-4) Gamma ray attenuation 2189900600015 (ERR-5) Pulse height weighting 2189900600016 (ERR-6) Pile-up events 2189900600017 (ERR-7) Normalization 2189900600018 Sample mass is given as 0. value . 2189900600019 REL-REF (D,40520009,V.N.Kononov+,J,SNP,26,500,1977) 2189900600020 (D,21765005,M.Mizumoto,J,NP/A,357,90,1981) 2189900600021 (D,12095005,R.L.Macklin+,J,NAT,197,369,1963) 2189900600022 STATUS (TABLE) Table 7 of J,AJ,300,41,1985- data for selective2189900600023 three representative energies. 2189900600024 Whole set of measured cross section is in 2189900600025 Winters+,R,KFK-3827,1984 ( not available yet) 2189900600026 HISTORY (20161102C) M.M. Subent was added. 2189900600027 ENDBIB 25 0 2189900600028 COMMON 6 3 2189900600029 ERR-1 ERR-2 ERR-4 ERR-5 ERR-6 ERR-7 2189900600030 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2189900600031 0.1 1.5 1.0 2.0 1.0 2.5 2189900600032 ENDCOMMON 3 0 2189900600033 DATA 3 3 2189900600034 EN DATA ERR-T 2189900600035 KEV MB MB 2189900600036 10. 3292. 186. 2189900600037 30. 1375. 22. 2189900600038 100. 741. 7. 2189900600039 ENDDATA 5 0 2189900600040 ENDSUBENT 39 0 2189900699999 SUBENT 21899007 20161102 22552189900700001 BIB 6 24 2189900700002 REACTION (62-SM-150(N,G)62-SM-151,,SIG) 2189900700003 SAMPLE Sample contents : 2189900700004 Sm-144 < 0.05%, Sm-147 - 0.39%, Sm-148 - 0.47 %, 2189900700005 Sm-149 - 1.70%, Sm-150 - 95.48%, Sm-152 - 1.46%, 2189900700006 Sm-154 - 0.45%; 2189900700007 other rare earth (% by mass) - 0.55; 2189900700008 other elements (% by mass) - 1.18 . 2189900700009 ERR-ANALYS (ERR-T) Total uncertainty 4.2 % 2189900700010 Source of uncertainty: 2189900700011 (ERR-1) Isotopic decomposition 2189900700012 (ERR-2) Background correction 2189900700013 (ERR-3,,2.) Finite sample correction 2189900700014 (ERR-4) Gamma ray attenuation 2189900700015 (ERR-5) Pulse height weighting 2189900700016 (ERR-6) Pile-up events 2189900700017 (ERR-7) Normalization 2189900700018 Sample mass is given as 0. value . 2189900700019 REL-REF (D,40520010,V.N.Kononov+,J,SNP,27,5,1978) 2189900700020 (A,12095006,R.L.Macklin+,J,NAT,197,369,1963) 2189900700021 STATUS (TABLE) Table 7 of J,AJ,300,41,1985- data for selective2189900700022 three representative energies. 2189900700023 Whole set of measured cross section is in 2189900700024 Winters+,R,KFK-3827,1984 ( not available yet) 2189900700025 HISTORY (20161102C) M.M. Subent was added. 2189900700026 ENDBIB 24 0 2189900700027 COMMON 6 3 2189900700028 ERR-1 ERR-2 ERR-4 ERR-5 ERR-6 ERR-7 2189900700029 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2189900700030 0.2 1.5 1.0 2.0 0.6 2.5 2189900700031 ENDCOMMON 3 0 2189900700032 DATA 3 3 2189900700033 EN DATA ERR-T 2189900700034 KEV MB MB 2189900700035 10. 909. 60. 2189900700036 30. 412. 13. 2189900700037 100. 285. 5. 2189900700038 ENDDATA 5 0 2189900700039 ENDSUBENT 38 0 2189900799999 SUBENT 21899008 20161102 22552189900800001 BIB 5 22 2189900800002 REACTION ((62-SM-148(N,G)62-SM-149,,SIG,,MXW)// 2189900800003 (62-SM-150(N,G)62-SM-151,,SIG,,MXW)) 2189900800004 ERR-ANALYS (DATA-ERR) Total error(~3.9%) is smaller than for cross2189900800005 section, because some uncertainties are correlated, and2189900800006 therefore (partly) cancel in the ratio. 2189900800007 See formula (7) in J,AJ,300,41,1985 used for 2189900800008 calculation of ratio variance by the uncertainties 2189900800009 given for 148S and 150Sm. 2189900800010 Correlation coefficient between errors 2189900800011 of 148S and 150Sm : 2189900800012 ERR-1 0. 2189900800013 ERR-2 25. 2189900800014 ERR-3 25. 2189900800015 ERR-4 25. 2189900800016 ERR-5 100. 2189900800017 ERR-6 0. 2189900800018 ERR-7 100. 2189900800019 COMMENT Of compiler M.M. The units of correlation coefficients 2189900800020 (see ERR-ANALYS) are not mentioned in the article, 2189900800021 but probably - % . 2189900800022 STATUS (TABLE) Table 8 of J,AJ,300,41,1985 2189900800023 HISTORY (20161102C) M.M. Subent was added. 2189900800024 ENDBIB 22 0 2189900800025 NOCOMMON 0 0 2189900800026 DATA 3 5 2189900800027 KT DATA DATA-ERR 2189900800028 KEV NO-DIM NO-DIM 2189900800029 10. 0.638 0.030 2189900800030 20. 0.608 0.026 2189900800031 30. 0.596 0.022 2189900800032 50. 0.578 0.021 2189900800033 100. 0.554 0.020 2189900800034 ENDDATA 7 0 2189900800035 ENDSUBENT 34 0 2189900899999 ENDENTRY 8 0 2189999999999