ENTRY 14747 20250423 1474700000001 SUBENT 14747001 20250423 20250711 1474700100001 BIB 11 48 1474700100002 TITLE Nuclear spectrometry of 9.6 h 196Aum2 and the 1474700100003 reaction of 197Au with fast neutrons 1474700100004 AUTHOR (K.J.Moody,N.Gharibyan,D.A.Shaughnessy,P.M.Grant, 1474700100005 J.M.Gostic,C.J.Cerjan,C.B.Yeamans,J.D.Despotopulos, 1474700100006 S.A.Faye) 1474700100007 REFERENCE (J,JP/G,47,045116,2020) 1474700100008 #doi:10.1088/1361-6471/ab67e9 1474700100009 INSTITUTE (1USALRL) 1474700100010 FACILITY (LASER,1USALRL) The National Ignition Facility at 1474700100011 Lawrence Livermore National Laboratory. 1474700100012 DETECTOR (GE) gamma- and x-ray photons were measured with 1474700100013 single semiconductor germanium photon detectors. 1474700100014 SAMPLE The targets consisted of thin gold foils, nominally 1474700100015 2.5 cm in diameter, backed with thin aluminum foils 1474700100016 to act as flux monitors via the 27Al(n,a)24Na 1474700100017 reaction and to collect reaction products recoiling 1474700100018 from the gold. The foils were fielded in sealed 1474700100019 aluminum irradiation fixtures (Target Option 1474700100020 Activation Device (TOAD)), often as part of a stack 1474700100021 of foils comprising other activation experiments. The 1474700100022 TOADs are 2 mm thick and 5 cm diameter, and can 1474700100023 accommodate circular foils up to 2.5 cm diameter in a 1474700100024 stack that can be as thick as 0.6 mm. Targets of 1474700100025 different materials are isolated from one another by 1474700100026 thin aluminum foils; recoil losses of 15 h 24Na from 1474700100027 a backing foil are replaced by recoil from the 1474700100028 upstream foil stack or the TOAD cover plate, 1474700100029 validating the use of 27Al as a flux monitor. The 1474700100030 TOAD is sealed with an adhesive that, after curing, 1474700100031 can be reopened with mechanical force to release the 1474700100032 irradiated foils. 1474700100033 METHOD (ACTIV) The neutron activation of gold is the basis 1474700100034 of an implosion performance diagnostic at the 1474700100035 National Ignition Facility at Lawrence Livermore 1474700100036 National Laboratory. 1474700100037 ERR-ANALYS (ERR-T) All errors are reported at the one-sigma 1474700100038 limit. The statistical and systematic uncertainties 1474700100039 were propagated. 1474700100040 (ERR-SYS,1.,2.) The systematic uncertainty of 1%-2%, 1474700100041 from the uncertainties of the decay rates of the 1474700100042 radionuclides in the sources used in the calibration 1474700100043 of the detectors, does not apply to the reported 1474700100044 ratios of gamma-ray intensities. 1474700100045 CORRECTION Correction for self-attenuation by the relatively 1474700100046 thick gold foils, the extended-source geometric 1474700100047 correction, and for gamma-ray absolute branching 1474700100048 ratios. 1474700100049 HISTORY (20250423C) BP 1474700100050 ENDBIB 48 0 1474700100051 COMMON 1 3 1474700100052 EN 1474700100053 MEV 1474700100054 14.1 1474700100055 ENDCOMMON 3 0 1474700100056 ENDSUBENT 55 0 1474700199999 SUBENT 14747002 20250423 20250711 1474700200001 BIB 4 9 1474700200002 REACTION (79-AU-197(N,2N)79-AU-196-G+M1,,SIG) 1474700200003 SAMPLE Sample ID: T65, Al monitor per 5.02 cm2: 32.6 mg. 1474700200004 DECAY-DATA (79-AU-196-G,6.167D,DG,333.0,0.263, 1474700200005 DG,355.7,1.0, 1474700200006 DG,1091.4,0.00171) 1474700200007 (79-AU-196-G,6.167D,DG,426.0,1.0) 1474700200008 STATUS (TABLE,,K.J.Moody,J,JP/G,47,045116,2020) - Table17 1474700200009 (COREL,14747003) Data from sample ID T64 1474700200010 (COREL,14747004) Data from sample ID T66 1474700200011 ENDBIB 9 0 1474700200012 NOCOMMON 0 0 1474700200013 DATA 2 1 1474700200014 DATA ERR-T 1474700200015 B B 1474700200016 1.959 0.027 1474700200017 ENDDATA 3 0 1474700200018 ENDSUBENT 17 0 1474700299999 SUBENT 14747003 20250423 20250711 1474700300001 BIB 4 9 1474700300002 REACTION (79-AU-197(N,2N)79-AU-196-G+M1,,SIG) 1474700300003 DECAY-DATA (79-AU-196-G,6.167D,DG,333.0,0.263, 1474700300004 DG,355.7,1.0, 1474700300005 DG,1091.4,0.00171) 1474700300006 (79-AU-196-G,6.167D,DG,426.0,1.0) 1474700300007 SAMPLE Sample ID: T64, Al monitor per 5.02 cm2: 32.7 mg. 1474700300008 STATUS (TABLE,,K.J.Moody,J,JP/G,47,045116,2020) - Table17 1474700300009 (COREL,14747002) Data from sample ID T65 1474700300010 (COREL,14747004) Data from sample ID T66 1474700300011 ENDBIB 9 0 1474700300012 NOCOMMON 0 0 1474700300013 DATA 2 1 1474700300014 DATA ERR-T 1474700300015 B B 1474700300016 2.040 0.036 1474700300017 ENDDATA 3 0 1474700300018 ENDSUBENT 17 0 1474700399999 SUBENT 14747004 20250423 20250711 1474700400001 BIB 4 9 1474700400002 REACTION (79-AU-197(N,2N)79-AU-196-G+M1,,SIG) 1474700400003 DECAY-DATA (79-AU-196-G,6.167D,DG,333.0,0.263, 1474700400004 DG,355.7,1.0, 1474700400005 DG,1091.4,0.00171) 1474700400006 (79-AU-196-G,6.167D,DG,426.0,1.0) 1474700400007 SAMPLE Sample ID: T66, Al monitor per 5.02 cm2: 32.5 mg. 1474700400008 STATUS (TABLE,,K.J.Moody,J,JP/G,47,045116,2020) - Table17 1474700400009 (COREL,14747002) Data from sample ID T65 1474700400010 (COREL,14747003) Data from sample ID T64 1474700400011 ENDBIB 9 0 1474700400012 NOCOMMON 0 0 1474700400013 DATA 2 1 1474700400014 DATA ERR-T 1474700400015 B B 1474700400016 1.958 0.032 1474700400017 ENDDATA 3 0 1474700400018 ENDSUBENT 17 0 1474700499999 SUBENT 14747005 20250423 20250711 1474700500001 BIB 3 6 1474700500002 REACTION (79-AU-197(N,2N)79-AU-196-G+M1,,SIG,,AV) 1474700500003 ANALYSIS Weighted average. 1474700500004 STATUS (DEP,14747002) 1474700500005 (DEP,14747003) 1474700500006 (DEP,14747004) 1474700500007 (TABLE,,K.J.Moody,J,JP/G,47,045116,2020) - Table17 1474700500008 ENDBIB 6 0 1474700500009 NOCOMMON 0 0 1474700500010 DATA 2 1 1474700500011 DATA ERR-T 1474700500012 B B 1474700500013 1.979 0.026 1474700500014 ENDDATA 3 0 1474700500015 ENDSUBENT 14 0 1474700599999 SUBENT 14747006 20250423 20250711 1474700600001 BIB 3 7 1474700600002 REACTION (79-AU-197(N,2N)79-AU-196-M2/G+M1,,SIG/RAT) 1474700600003 DECAY-DATA (79-AU-196-G,6.167D,DG,333.0,0.263, 1474700600004 DG,355.7,1.0, 1474700600005 DG,1091.4,0.00171) 1474700600006 (79-AU-196-G,6.167D,DG,426.0,1.0) 1474700600007 (79-AU-196-M2,576.2MIN,DG) Measured by authors. 1474700600008 STATUS (TABLE,,K.J.Moody,J,JP/G,47,045116,2020) - Table19 1474700600009 ENDBIB 7 0 1474700600010 NOCOMMON 0 0 1474700600011 DATA 2 1 1474700600012 DATA ERR-T 1474700600013 NO-DIM NO-DIM 1474700600014 0.0731 0.0019 1474700600015 ENDDATA 3 0 1474700600016 ENDSUBENT 15 0 1474700699999 SUBENT 14747007 20250423 20250711 1474700700001 BIB 3 11 1474700700002 REACTION (79-AU-197(N,2N)79-AU-196,,SIG) 1474700700003 ANALYSIS The total cross section for the production of the sum 1474700700004 of all isomeric states (196Aut) is obtained by 1474700700005 multiplying by (1 + I), where I is the isomer ratio. 1474700700006 Propagating the uncertainty with those associated with 1474700700007 the two activation fractions and the isomer ratio a 1474700700008 reaction cross section for 197Au(n,2n)196Aut is 1474700700009 obtained. 1474700700010 STATUS (DEP,14747005) 1474700700011 (DEP,14747006) 1474700700012 (TABLE,,K.J.Moody,J,JP/G,47,045116,2020) - Table18 1474700700013 ENDBIB 11 0 1474700700014 NOCOMMON 0 0 1474700700015 DATA 2 1 1474700700016 DATA ERR-T 1474700700017 B B 1474700700018 2.124 0.055 1474700700019 ENDDATA 3 0 1474700700020 ENDSUBENT 19 0 1474700799999 ENDENTRY 7 0 1474799999999