ENTRY 31801 20200710 31973180100000001 SUBENT 31801001 20200710 31973180100100001 BIB 11 23 3180100100002 TITLE Improved 242Pu(n,g) thermal cross section combining 3180100100003 activation and prompt gamma analysis 3180100100004 AUTHOR (J.Lerendegui-Marco, C.Guerrero, T.Belgya, B.Maroti, 3180100100005 K.Eberhardt, Ch.E.Duellmann, A.R.Junghans, C.Mokry, 3180100100006 J.M.Quesada, J.Runke, P.Thoerle-Pospiech) 3180100100007 INSTITUTE (2SPNSEU,3HUNKFI,2GERMNZ,2GERGSI,2GERZFK) 3180100100008 (2SPNSPN) Centro Nacional de Aceleradores, Seville 3180100100009 (2GERGER) Helmholtz Institute Mainz, Mainz 3180100100010 REFERENCE (J,EPJ/A,55,63,2019) 3180100100011 FACILITY (REAC,3HUNKFI) Budapest Research Reactor (BRR) 3180100100012 INC-SOURCE (REAC) Neutron guide line connected to a He-cooled 3180100100013 liquid-hydrogen (~18 K) moderator based neutron 3180100100014 source 3180100100015 INC-SPECT Average neutron energy of 12 meV (140 K) 3180100100016 SAMPLE (94-PU-242,ENR=0.99959) 3180100100017 242Pu (~15 mg, 99.959% pure, ~<1 um) electrodeposited 3180100100018 on to Al backing (20 um) with a 50 nm Ti coating. 3180100100019 ADD-RES The weighted average of the cross sections from the 3180100100020 three method (activation method, PGAA single line 3180100100021 method, and PGAA unfolding method) gives the 3180100100022 average thermal capture cross secton=18.9+/-0.9 b. 3180100100023 STATUS (APRVD) Approved by Jorge Lerendegui-Marco (2020-07-16)3180100100024 HISTORY (20200710C) On 3180100100025 ENDBIB 23 0 3180100100026 COMMON 1 3 3180100100027 EN 3180100100028 EV 3180100100029 0.0253 3180100100030 ENDCOMMON 3 0 3180100100031 ENDSUBENT 30 0 3180100199999 SUBENT 31801002 20200710 31973180100200001 BIB 11 45 3180100200002 REACTION (94-PU-242(N,G)94-PU-243,,SIG) 3180100200003 DECAY-DATA The 67 keV line was also measured but excluded 3180100200004 due to large uncertainty in decay intensity (50%). 3180100200005 ((1.)94-PU-243,4.956HR,DG,41.8,0.0063) 3180100200006 ((2.)94-PU-243,4.956HR,DG,84.0,0.192) 3180100200007 ((3.)94-PU-243,4.956HR,DG,109.2,0.00134) 3180100200008 ((4.)94-PU-243,4.956HR,DG,381.6,0.0048) 3180100200009 REL-REF (R,,P.Leconte+,C,2007NICE,,521,2007) 3180100200010 243Pu decay gamma intensity 3180100200011 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 3180100200012 DECAY-MON (79-AU-198,,DG,411.8020,0.9562) 3180100200013 SAMPLE 242Pu #1 0.458(13) E+19 at/cm2, 14x14 mm2 3180100200014 242Pu #2+Au 0.472(14)+15.07(2) E+19 at/cm2, 10x10 mm2 3180100200015 DETECTOR (HPGE) Canberra GR1319 (13% relative efficiency) 3180100200016 METHOD (ACTIV) 3180100200017 242Pu sample #1: Irradiated for 1326.53 min, 3180100200018 cooled for 1.57 hr, 3180100200019 measured for ~25 hr. 3180100200020 242Pu sample #2: Irradiated for 1036.76 min, 3180100200021 cooled for 3.00 hr, 3180100200022 measured for ~20 hr. 3180100200023 197Au sample: Irradiated for 1036.76 min, 3180100200024 cooled for 24.67 hr/55.87 hr, 3180100200025 measured for 1 hr (twice) 3180100200026 CORRECTION Corrected for 3180100200027 - non-thermal flux of the PGAA beam line 3180100200028 - fraction of activated nuclei not undergone decay 3180100200029 at end-of-irradiation 3180100200030 - fraction of gamma-rays escaping the target 3180100200031 - deviation of efficiency in actual measurement 3180100200032 geometry from point source measurement geometry 3180100200033 ERR-ANALYS (ERR-T) Total uncertainty propagated from 3180100200034 (ERR-1,,,F) Peak integral/Au (0.15%) 3180100200035 (ERR-2,,,F) Peak intensity/Au (0.06%) 3180100200036 (ERR-3,,,F) Peak efficiency/Au (1.3%) 3180100200037 (ERR-4,,,F) Efficiency correction/Au (0.5%) 3180100200038 (ERR-5,,,F) Mass/Au (0.10%) 3180100200039 (ERR-6,,,F) Normalization/Au (2.2%) 3180100200040 (ERR-7,,,F) Efficiency correction/Pu (0.5%) 3180100200041 (ERR-8,,,F) Sample inhomogenity/Pu (4.0%) 3180100200042 (ERR-9,,,F) Mass/Pu (3.0%) 3180100200043 (ERR-10) Counting statistics/Pu 3180100200044 (ERR-11) Decay gamma intensity/P 3180100200045 (ERR-12) Detection efficiency/Pu 3180100200046 STATUS (TABLE) Table 6 of Eur.Phys.J.A,55(2019)63 3180100200047 ENDBIB 45 0 3180100200048 COMMON 9 6 3180100200049 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 3180100200050 ERR-7 ERR-8 ERR-9 3180100200051 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3180100200052 PER-CENT PER-CENT PER-CENT 3180100200053 0.15 0.06 1.3 0.5 0.10 2.2 3180100200054 0.5 4.0 3.0 3180100200055 ENDCOMMON 6 0 3180100200056 DATA 6 4 3180100200057 DATA ERR-T ERR-10 ERR-11 ERR-12 DECAY-FLAG 3180100200058 B B PER-CENT PER-CENT PER-CENT NO-DIM 3180100200059 17.9 2.1 1.9 10. 1.8 1. 3180100200060 18.0 1.4 0.5 5.2 1.5 2. 3180100200061 21. 3. 2.9 11. 1.4 3. 3180100200062 19.5 1.7 2.0 6.6 1.3 4. 3180100200063 ENDDATA 6 0 3180100200064 ENDSUBENT 63 0 3180100299999 SUBENT 31801003 20200710 31973180100300001 BIB 4 22 3180100300002 REACTION (94-PU-242(N,G)94-PU-243,,SIG,,AV) 3180100300003 ANALYSIS Weighted average of cross sections obtained from the 3180100300004 counts of four gamma lines 3180100300005 ERR-ANALYS (ERR-T) Total uncertainty propagated from 3180100300006 (ERR-1) Peak integral/Au (0.15%) 3180100300007 (ERR-2) Peak intensity/Au (0.06%) 3180100300008 (ERR-3) Peak efficiency/Au (1.3%) 3180100300009 (ERR-4) Efficiency correction/Au (0.5%) 3180100300010 (ERR-5) Mass/Au (0.10%) 3180100300011 (ERR-6) Normalization/Au (2.2%) 3180100300012 (ERR-7) Efficiency correction/Pu (0.5%) 3180100300013 (ERR-8) Sample inhomogenity/Pu (4.0%) 3180100300014 (ERR-9) Mass/Pu (3.0%) 3180100300015 (ERR-10) Gamma-line dependent uncertainty 3180100300016 - counting statistics/Pu 3180100300017 - decay gamma intensity/Pu 3180100300018 - detection efficiency/Pu 3180100300019 (0.9 b in the weighted average) 3180100300020 STATUS (TABLE) Table 6 + text (p.8) of Eur.Phys.J.A,55(2019)633180100300021 (DEP,31801002) Cross section for each gamma line 3180100300022 (COREL,31801006) Result from PGAA single line method 3180100300023 (COREL,31801007) Result from PGAA unfolding method 3180100300024 ENDBIB 22 0 3180100300025 COMMON 9 6 3180100300026 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 3180100300027 ERR-7 ERR-8 ERR-9 3180100300028 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3180100300029 PER-CENT PER-CENT PER-CENT 3180100300030 0.15 0.06 1.3 0.5 0.10 2.2 3180100300031 0.5 4.0 3.0 3180100300032 ENDCOMMON 6 0 3180100300033 DATA 3 1 3180100300034 DATA ERR-T ERR-10 3180100300035 B B B 3180100300036 18.7 1.4 0.9 3180100300037 ENDDATA 3 0 3180100300038 ENDSUBENT 37 0 3180100399999 SUBENT 31801004 20200710 31973180100400001 BIB 9 29 3180100400002 REACTION (94-PU-242(N,G)94-PU-243,PAR,SIG) 3180100400003 MONITOR (14-SI-28(N,G)14-SI-29,PAR,SIG) 3180100400004 SAMPLE 242Pu #1 0.458(13) E+19 at/cm2, 14x14 mm2 3180100400005 242Pu #2 0.472(14) E+19 at/cm2, 10x10 mm2 3180100400006 Al 23.16(3) E+19 at/cm2, 14x14 mm2 3180100400007 Si 187.5(3) E+19 at/cm2, 14x14 mm2 3180100400008 DETECTOR (BGO,HPGE) BGO guarded Canberra GR2720/S (27% relative 3180100400009 efficiency) 3180100400010 METHOD PGAA single line method 3180100400011 CORRECTION Corrected for 3180100400012 - non-thermal flux of the PGAA beam line 3180100400013 - fraction of gamma-rays escaping the target 3180100400014 - deviation of efficiency in actual measurement 3180100400015 geometry from point source measurement geometry 3180100400016 - background (determined by additional irradiation 3180100400017 of Al, Ti, CH2, glue as well as empty run) 3180100400018 FLAG (1.) Short irradiation (110.64 min) of 242Pu #1+Si 3180100400019 (2.) Short irradiation (77.42 min) of 242Pu #2+Si 3180100400020 (3.) Long irradiation (1326.53 min) of 242Pu #1 3180100400021 ERR-ANALYS (ERR-T) Total uncertainty propagated from 3180100400022 (ERR-1,,,F) Counting statistics/Al (0.27%) 3180100400023 (ERR-2,,,F) gamma production cross section/Al (1.3%) 3180100400024 (ERR-3,,,F) Detection efficiency/Al (1.28%) 3180100400025 (ERR-4,,,F) Sample inhomogenity/Pu (4.0%) 3180100400026 (ERR-5,,,F) Mass/Pu (3.0%) 3180100400027 (ERR-6) Counting statistics/Si 3180100400028 (ERR-7) Detection efficiency/Si 3180100400029 (MONIT-ERR) gamma production cross section/Si 3180100400030 STATUS (TABLE) Table 11 of Eur.Phys.J.A,55(2019)63 3180100400031 ENDBIB 29 0 3180100400032 COMMON 6 3 3180100400033 E ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 3180100400034 KEV PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3180100400035 287. 0.27 1.3 1.28 4.0 3.0 3180100400036 ENDCOMMON 3 0 3180100400037 DATA 8 9 3180100400038 DATA ERR-T ERR-6 ERR-7 MONIT MONIT-ERR 3180100400039 E-NRM FLAG 3180100400040 B B PER-CENT PER-CENT PER-CENT B 3180100400041 KEV NO-DIM 3180100400042 7.5 0.6 0.72 1.27 0.029 1.9 3180100400043 1273. 1. 3180100400044 6.9 0.5 0.72 1.27 0.029 1.9 3180100400045 1273. 2. 3180100400046 7.7 0.6 0.72 1.27 0.029 1.9 3180100400047 1273. 3. 3180100400048 7.1 0.5 0.54 1.39 0.119 1.7 3180100400049 3538. 1. 3180100400050 6.5 0.5 0.54 1.39 0.119 1.7 3180100400051 3538. 2. 3180100400052 7.3 0.5 0.54 1.39 0.119 1.7 3180100400053 3538. 3. 3180100400054 7.2 0.5 0.67 1.39 0.112 2.0 3180100400055 4333. 1. 3180100400056 6.8 0.5 0.67 1.39 0.112 2.0 3180100400057 4333. 2. 3180100400058 7.4 0.6 0.67 1.39 0.112 2.0 3180100400059 4333. 3. 3180100400060 ENDDATA 22 0 3180100400061 ENDSUBENT 60 0 3180100499999 SUBENT 31801005 20200710 31973180100500001 BIB 4 12 3180100500002 REACTION (94-PU-242(N,G)94-PU-243,PAR,SIG,,AV) 3180100500003 ANALYSIS Weighted average of cross sections obtained from 3180100500004 three irradiation and three Si gamma lines 3180100500005 ERR-ANALYS (ERR-T) Total uncertainty 3180100500006 (ERR-1) Counting statistics/Al (0.27%) 3180100500007 (ERR-2) gamma production cross section/Al (1.3%) 3180100500008 (ERR-3) Detection efficiency/Al (1.28%) 3180100500009 (ERR-4) Sample inhomogenity/Pu (4.0%) 3180100500010 (ERR-5) Mass/Pu (3.0%) 3180100500011 STATUS (TABLE) Text (p.11) of Eur.Phys.J.A,55(2019)63 3180100500012 (DEP,31801004) Cross sections from three irradiation 3180100500013 and three Si gamma lines 3180100500014 ENDBIB 12 0 3180100500015 COMMON 5 3 3180100500016 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 3180100500017 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3180100500018 0.27 1.3 1.28 4.0 3.0 3180100500019 ENDCOMMON 3 0 3180100500020 DATA 3 1 3180100500021 E DATA ERR-T 3180100500022 KEV B B 3180100500023 287. 7.1 0.4 3180100500024 ENDDATA 3 0 3180100500025 ENDSUBENT 24 0 3180100599999 SUBENT 31801006 20200710 31973180100600001 BIB 5 11 3180100600002 REACTION (94-PU-242(N,G)94-PU-243,,SIG,,,DERIV) 3180100600003 REL-REF (R,,C.D.Nesaraja+,J,NDS,121,695,2014) 3180100600004 287 keV prompt gamma emission probability 0.41+/-0.07 3180100600005 ANALYSIS 287 keV gamma production cross section divided by 3180100600006 its emission probability 3180100600007 ERR-ANALYS (ERR-T) Total uncertainty 3180100600008 (ERR-1) gamma emission probability (17%) 3180100600009 STATUS (TABLE) Table 14 of Eur.Phys.J.A,55(2019)63 3180100600010 (DEP,31801005) 287 keV gamma production cross section 3180100600011 (COREL,31801003) Result from activation method 3180100600012 (COREL,31801007) Result from PGAA unfolding method 3180100600013 ENDBIB 11 0 3180100600014 NOCOMMON 0 0 3180100600015 DATA 3 1 3180100600016 DATA ERR-T ERR-1 3180100600017 B B PER-CENT 3180100600018 17. 3. 17. 3180100600019 ENDDATA 3 0 3180100600020 ENDSUBENT 19 0 3180100699999 SUBENT 31801007 20200710 31973180100700001 BIB 8 24 3180100700002 REACTION (94-PU-242(N,G)94-PU-243,,SIG) 3180100700003 MONITOR (94-PU-242(N,G)94-PU-243,PAR,SIG) 3180100700004 DETECTOR (BGO,HPGE) BGO guarded Canberra GR2720/S (27% relative 3180100700005 efficiency) 3180100700006 METHOD PGAA unfolding method 3180100700007 ANALYSIS Summation of the following contributions: 3180100700008 - continuum (<1500 keV) with theoretical internal 3180100700009 conversion correction - 2.7 b 3180100700010 - discrete transition (<1500 keV) with theoretical 3180100700011 and measured internal conversion correction - 4.1 b 3180100700012 - all transition (>1500 keV) where internal 3180100700013 conversion correction is negligible - 12.4 b 3180100700014 REL-REF (M,,T.Belgya+,S,CERN-PROC-2014-002,119,2014) 3180100700015 PGAA unfolding method 3180100700016 ERR-ANALYS (ERR-T) The overall uncertainty (6.5%) from 3180100700017 (ERR-1) Multipolarity assignment in internal conversion3180100700018 correction (1.3%)3180100700019 (ERR-2) Statistics in background-subtracted spectrum 3180100700020 propagated to the weighted sum (3.7%)3180100700021 (MONIT-ERR) 287 keV gamma prod. cross section (5.2%)3180100700022 STATUS (TABLE) Table 14 of Eur.Phys.J.A,55(2019)63 3180100700023 (DEP,31801005) 287 keV production cross section 3180100700024 (COREL,31801003) Result from activation method 3180100700025 (COREL,31801006) Result from PGAA single line method 3180100700026 ENDBIB 24 0 3180100700027 COMMON 2 3 3180100700028 ERR-1 ERR-2 3180100700029 PER-CENT PER-CENT 3180100700030 1.3 3.7 3180100700031 ENDCOMMON 3 0 3180100700032 DATA 5 1 3180100700033 DATA ERR-T E-NRM MONIT MONIT-ERR 3180100700034 B B MEV B B 3180100700035 19.2 1.3 287. 7.1 0.4 3180100700036 ENDDATA 3 0 3180100700037 ENDSUBENT 36 0 3180100799999 ENDENTRY 7 0 3180199999999