ENTRY 22182 20210902 23032218200000001 SUBENT 22182001 20210902 23032218200100001 BIB 12 45 2218200100002 TITLE The stellar neutron capture cross sections of 94-Zr 2218200100003 and 96-Zr. 2218200100004 AUTHOR (K.A.Toukan,F.Kaeppeler) 2218200100005 REFERENCE (J,AJ,348,357,1990) 2218200100006 (R,INDC(GER)-0053,2021) Revised values of Karlsruhe 2218200100007 cross sections. 2218200100008 INSTITUTE (2GERKFK) 2218200100009 FACILITY (VDG,2GERKFK) 3.75MV van de Graaff accelerator operated2218200100010 in DC mode during activation runs. 2218200100011 INC-SOURCE (P-LI7) Thick metallic natural Li target on a 1.0 mm 2218200100012 thick water-cooled Cu backing. Using 1912 keV protons 2218200100013 the 120 deg forward cone of emitted neutrons closely 2218200100014 approximates to a Maxwellian kT = 25 keV shape. Total 2218200100015 neutron rate was 5.0E+8/s. 2218200100016 SAMPLE Metallic Zr discs of 8 or 10 mm diam placed directly 2218200100017 on the Li target and sandwiched with 0.03 mm thick 2218200100018 Au foils of the same diameter. 2218200100019 METHOD (ACTIV) Sample thickness and diameter and sample/ 2218200100020 monitor foil sequence varied systematically, allowing 2218200100021 uncertainties and corrections to Be studied and 2218200100022 quantified. 2218200100023 (TOF ) Before each irradiation the proton energy was 2218200100024 readjusted to produce the required maximum neutron 2218200100025 energy of 106 keV; this best defines the quasi-stellar2218200100026 spectrum at kT = 25 keV. The accelerator was operated 2218200100027 in pulsed mode to enable the neutron energy to be 2218200100028 determined using the tof technique. 2218200100029 DETECTOR (GLASD) 1 mm thick 6-Li glass detector to monitor 2218200100030 neutron yield, positioned on the beam axis 91 cm from 2218200100031 the target. Readings were taken every 2 mins. 2218200100032 (HPGE) Used in gamma counting. The efficiency was care 2218200100033 fully calibrated in range Eg = 150 - 800 keV using a 2218200100034 set of standard sources. 2218200100035 DECAY-DATA (40-ZR-95,64.02D,DG,756.7,.545) 2218200100036 (40-ZR-97,16.90HR,DG,743.3,.9475) 2218200100037 ERR-ANALYS (ERR-T) Total error 2218200100038 (ERR-1,0.1,0.5) Uncertainty in sample thickness 2218200100039 (ERR-2,0.1,0.5) Uncertainty in time factors 2218200100040 (ERR-3) Uncertainty in self-absorption 2218200100041 (ERR-4) Uncertainty in gamma-lines efficiency ratio 2218200100042 (ERR-5) Uncertainty in neutron flux differences. 2218200100043 HISTORY (19910412C) SW. 2218200100044 (19910716A) SW. Facility lab code added, critique added2218200100045 (20210902A) SD:Entry re-compiled. Subents 003 - 009 2218200100046 added. 2218200100047 ENDBIB 45 0 2218200100048 COMMON 3 3 2218200100049 ERR-3 ERR-4 ERR-5 2218200100050 PER-CENT PER-CENT PER-CENT 2218200100051 0.7 1.3 1.5 2218200100052 ENDCOMMON 3 0 2218200100053 ENDSUBENT 52 0 2218200199999 SUBENT 22182002 20210902 23032218200200001 BIB 11 28 2218200200002 REACTION (40-ZR-94(N,G)40-ZR-95,,SIG,,MXW) 2218200200003 MONITOR (79-AU-197(N,G)79-AU-198,,SIG,,MXW) 2218200200004 MONIT-REF (22099003,W.Ratynski+,J,PR/C,37,595,1988) The value in 2218200200005 work 22099 has been corrected and multiplied by a 2218200200006 factor 2/(pi**0.5). 2218200200007 DECAY-MON (79-AU-198-G,2.696D,DG,411.8,.955) 2218200200008 DECAY-DATA (40-ZR-95,64.02D,DG,756.7,.545) 2218200200009 SAMPLE Three separate samples were used with the following 2218200200010 characteristics: 2218200200011 sample sequence diam(mm) atoms/b x 10-4 2218200200012 ---------------------------------------------------- 2218200200013 1. Au-Zr-Au 8 94-Zr: 3.719 +- 0.019 2218200200014 2. Zr-Au-Zr 8 94-Zr: 3.65 +- 0.019 2218200200015 3. Zr-Au-Zr 10 94-Zr: 1.97 +- 0.010 2218200200016 COMMENT Mean of three runs. The observed scatter about the 2218200200017 mean did not exceed the evaluated uncertainties. 2218200200018 ADD-RES Values for each run are given in the Tbl.4: 2218200200019 1. 27.5 +- 1.1 mb 2218200200020 2. 28.7 +- 1.0 mb 2218200200021 3. 29.5 +- 1.2 mb 2218200200022 ERR-ANALYS (ERR-S,1.7,3.0) Statistical error 2218200200023 (MONIT-ERR) Uncertainty in gold cross section 2218200200024 (ERR-6) Uncertainty in gamma-ray intensities 2218200200025 STATUS (TABLE) Tbl. 4 from Astrophys.J.,348(1990)357 2218200200026 (SPSDD,22182006) Renormalized. 2218200200027 HISTORY (19910716A) S.W. Reactions modified 2218200200028 (20210902A) SD: Subent was split according to reaction 2218200200029 codes and energy value. Subent superseded. 2218200200030 ENDBIB 28 0 2218200200031 COMMON 1 3 2218200200032 ERR-6 2218200200033 PER-CENT 2218200200034 0.4 2218200200035 ENDCOMMON 3 0 2218200200036 DATA 5 1 2218200200037 KT DATA ERR-T MONIT MONIT-ERR 2218200200038 KEV MB MB MB PER-CENT 2218200200039 25. 28.6 1. 648. 1.5 2218200200040 ENDDATA 3 0 2218200200041 ENDSUBENT 40 0 2218200299999 SUBENT 22182003 20210902 23032218200300001 BIB 10 25 2218200300002 REACTION (40-ZR-96(N,G)40-ZR-97,,SIG,,MXW) 2218200300003 MONITOR (79-AU-197(N,G)79-AU-198,,SIG,,MXW) 2218200300004 MONIT-REF (22099003,W.Ratynski+,J,PR/C,37,595,1988) The value in 2218200300005 work 22099 has been corrected and multiplied by a 2218200300006 factor 2/(pi**0.5). 2218200300007 DECAY-MON (79-AU-198-G,2.696D,DG,411.8,.955) 2218200300008 SAMPLE Three separate samples were used with the following 2218200300009 characteristics: 2218200300010 sample sequence diam(mm) atoms/B x 10-4 2218200300011 ---------------------------------------------------- 2218200300012 1. Au-Zr-Au 8 96-Zr: 0.598 +- 0.003 2218200300013 2. Zr-Au-Zr 8 96-Zr: 0.59 +- 0.003 2218200300014 3. Zr-Au-Zr 10 96-Zr: 0.32 +- 0.002 2218200300015 COMMENT Mean of three runs. The observed scatter about the 2218200300016 mean did not exceed the evaluated uncertainties. 2218200300017 ADD-RES Values for each run are given in the Tbl.4: 2218200300018 1. 11.9 +- 0.4 mb 2218200300019 2. 11.6 +- 0.4 mb 2218200300020 3. 11.3 +- 0.4 mb 2218200300021 ERR-ANALYS (ERR-S,1.4,2.1) Statistical error 2218200300022 (MONIT-ERR) Uncertainty in gold cross section 2218200300023 (ERR-6) Uncertainty in gamma-ray intensities 2218200300024 STATUS (TABLE) Tbl. 4 from Astrophys.J.,348(1990)357 2218200300025 (SPSDD,22182007) Renormalized. 2218200300026 HISTORY (20210902T) SD: Part of Subent 002. Subent superseded. 2218200300027 ENDBIB 25 0 2218200300028 COMMON 1 3 2218200300029 ERR-6 2218200300030 PER-CENT 2218200300031 0.3 2218200300032 ENDCOMMON 3 0 2218200300033 DATA 5 1 2218200300034 KT DATA ERR-T MONIT MONIT-ERR 2218200300035 KEV MB MB MB PER-CENT 2218200300036 25. 11.6 0.4 648. 1.5 2218200300037 ENDDATA 3 0 2218200300038 ENDSUBENT 37 0 2218200399999 SUBENT 22182004 20210902 23032218200400001 BIB 4 8 2218200400002 REACTION (40-ZR-94(N,G)40-ZR-95,,SIG,,MXW,DERIV) 2218200400003 ANALYSIS Extrapolated values using previously measured 2218200400004 cross section energy dependence in the case of 94-Zr. 2218200400005 and an En**(-0.5) dependence in the case of 96-Zr. 2218200400006 STATUS (TABLE) Tbl. 4 from Astrophys.J.,348(1990)357 2218200400007 (DEP,22182002) Cr.sect. at En=25 keV 2218200400008 (SPSDD,22182008) Renormalized. 2218200400009 HISTORY (20210902T) SD: Part of Subent 002. Subent superseded. 2218200400010 ENDBIB 8 0 2218200400011 NOCOMMON 0 0 2218200400012 DATA 3 1 2218200400013 KT DATA ERR-T 2218200400014 KEV MB MB 2218200400015 30. 26.4 1. 2218200400016 ENDDATA 3 0 2218200400017 ENDSUBENT 16 0 2218200499999 SUBENT 22182005 20210902 23032218200500001 BIB 4 8 2218200500002 REACTION (40-ZR-96(N,G)40-ZR-97,,SIG,,MXW,DERIV) 2218200500003 ANALYSIS Extrapolated values using previously measured 2218200500004 cross section an En**(-0.5) energy dependence in the 2218200500005 case of 96-Zr. 2218200500006 STATUS (TABLE) Tbl. 4 from Astrophys.J.,348(1990)357 2218200500007 (DEP,22182003) Cr.sect. at En=25 keV 2218200500008 (SPSDD,22182009) Renormalized. 2218200500009 HISTORY (20210728T) SD: Part of Subent 002. Subent superseded. 2218200500010 ENDBIB 8 0 2218200500011 NOCOMMON 0 0 2218200500012 DATA 3 1 2218200500013 KT DATA ERR-T 2218200500014 KEV MB MB 2218200500015 30. 10.7 0.5 2218200500016 ENDDATA 3 0 2218200500017 ENDSUBENT 16 0 2218200599999 SUBENT 22182006 20210902 23032218200600001 BIB 12 24 2218200600002 REACTION 1((40-ZR-94(N,G)40-ZR-95,,SIG,,MXW)/ 2218200600003 (79-AU-197(N,G)79-AU-198,,SIG,,MXW)) 2218200600004 2(40-ZR-94(N,G)40-ZR-95,,SIG,,MXW) 2218200600005 MONITOR (79-AU-197(N,G)79-AU-198,,SIG,,MXW) 2218200600006 DECAY-MON (79-AU-198-G,3881.0MIN,DG,411.80,0.9558) 2218200600007 MONIT-REF (,R.Reifarth+,J,EPJ/P,133,424,2018) 2218200600008 DECAY-DATA (40-ZR-95,64.02D,DG,756.7,.545) 2218200600009 ANALYSIS Cross section value in subentry 22182.002 is 2218200600010 renormalized for new gold cross section 2218200600011 CORRECTION Correction for revised gold standard: 681/648 =1.051 2218200600012 SAMPLE Three separate samples were used with the following 2218200600013 characteristics: 2218200600014 sample sequence diam(mm) atoms/b x 10-4 2218200600015 ---------------------------------------------------- 2218200600016 1. Au-Zr-Au 8 94-Zr: 3.719 +- 0.019 2218200600017 2. Zr-Au-Zr 8 94-Zr: 3.65 +- 0.019 2218200600018 3. Zr-Au-Zr 10 94-Zr: 1.97 +- 0.010 2218200600019 COMMENT Mean of three runs. The observed scatter about the 2218200600020 mean did not exceed the evaluated uncertainties. 2218200600021 ERR-ANALYS (ERR-S,1.7,3.0) Statistical error 2218200600022 (MONIT-ERR) Uncertainty in gold cross section 2218200600023 (ERR-6) Uncertainty in gamma-ray intensities 2218200600024 STATUS (TABLE) p.60 of INDC(GER)-0053 2218200600025 HISTORY (19910716C) SD 2218200600026 ENDBIB 24 0 2218200600027 COMMON 1 3 2218200600028 ERR-6 2218200600029 PER-CENT 2218200600030 0.4 2218200600031 ENDCOMMON 3 0 2218200600032 DATA 7 1 2218200600033 KT DATA 1ERR-T 1DATA 2ERR-T 2MONIT 2218200600034 MONIT-ERR 2218200600035 KEV NO-DIM NO-DIM MB MB MB 2218200600036 PER-CENT 2218200600037 25. 0.04414 0.00154 30.1 1. 681.2218200600038 1.0 2218200600039 ENDDATA 6 0 2218200600040 ENDSUBENT 39 0 2218200699999 SUBENT 22182007 20210902 23032218200700001 BIB 13 28 2218200700002 REACTION 1((40-ZR-96(N,G)40-ZR-97,,SIG,,MXW)/ 2218200700003 (79-AU-197(N,G)79-AU-198,,SIG,,MXW)) 2218200700004 2(40-ZR-96(N,G)40-ZR-97,,SIG,,MXW) 2218200700005 DECAY-DATA (40-ZR-97,16.90HR,DG,743.3,.9475) 2218200700006 DECAY-MON (79-AU-198-G,3881.0MIN,DG,411.80,0.9558) 2218200700007 MONITOR (79-AU-197(N,G)79-AU-198,,SIG,,MXW) 2218200700008 MONIT-REF (,R.Reifarth+,J,EPJ/P,133,424,2018) 2218200700009 ANALYSIS Cross section value in subentry 22182.002 is 2218200700010 renormalized for new gold cross section 2218200700011 CORRECTION Correction for revised gold standard: 681/648 =1.051 2218200700012 SAMPLE Three separate samples were used with the following 2218200700013 characteristics: 2218200700014 sample sequence diam(mm) atoms/b x 10-4 2218200700015 ---------------------------------------------------- 2218200700016 1. Au-Zr-Au 8 96-Zr: 0.598 +- 0.003 2218200700017 2. Zr-Au-Zr 8 96-Zr: 0.59 +- 0.003 2218200700018 3. Zr-Au-Zr 10 96-Zr: 0.32 +- 0.002 2218200700019 COMMENT Mean of three runs. The observed scatter about the 2218200700020 mean did not exceed the evaluated uncertainties. 2218200700021 ADD-RES Values for each run are given in the Tbl.4: 2218200700022 1. 11.9 +- 0.4 mb 2218200700023 2. 11.6 +- 0.4 mb 2218200700024 3. 11.3 +- 0.4 mb 2218200700025 ERR-ANALYS (ERR-S,1.4,2.1) Statistical error 2218200700026 (MONIT-ERR) Uncertainty in gold cross section 2218200700027 (ERR-6) Uncertainty in gamma-ray intensities 2218200700028 STATUS (TABLE) p.61 of INDC(GER)-0053 2218200700029 HISTORY (19910716C) SD 2218200700030 ENDBIB 28 0 2218200700031 COMMON 1 3 2218200700032 ERR-6 2218200700033 PER-CENT 2218200700034 0.3 2218200700035 ENDCOMMON 3 0 2218200700036 DATA 7 1 2218200700037 KT DATA 1ERR-T 1DATA 2ERR-T 2MONIT 2218200700038 MONIT-ERR 2218200700039 KEV NO-DIM NO-DIM MB MB MB 2218200700040 PER-CENT 2218200700041 25. 0.01790 0.00062 12.2 0.4 681. 2218200700042 1.0 2218200700043 ENDDATA 6 0 2218200700044 ENDSUBENT 43 0 2218200799999 SUBENT 22182008 20210902 23032218200800001 BIB 4 6 2218200800002 REACTION (40-ZR-94(N,G)40-ZR-95,,SIG,,MXW,DERIV) 2218200800003 ANALYSIS Extrapolated values using previously measured 2218200800004 cross section energy dependence in the case of 94-Zr. 2218200800005 STATUS (TABLE) p.60 of INDC(GER)-0053 2218200800006 (DEP,22182006) Cr.sect. at En=25 keV 2218200800007 HISTORY (19910716C) SD 2218200800008 ENDBIB 6 0 2218200800009 NOCOMMON 0 0 2218200800010 DATA 3 1 2218200800011 KT DATA ERR-T 2218200800012 KEV MB MB 2218200800013 30. 26.4 1. 2218200800014 ENDDATA 3 0 2218200800015 ENDSUBENT 14 0 2218200899999 SUBENT 22182009 20210902 23032218200900001 BIB 4 7 2218200900002 REACTION (40-ZR-96(N,G)40-ZR-97,,SIG,,MXW,DERIV) 2218200900003 ANALYSIS Extrapolated values using previously measured 2218200900004 cross section an En**(-0.5) energy dependence in the 2218200900005 case of 96-Zr. 2218200900006 STATUS (TABLE) p.60 of INDC(GER)-0053 2218200900007 (DEP,22182007) Cr.sect. at En=25 keV 2218200900008 HISTORY (19910716C) SD 2218200900009 ENDBIB 7 0 2218200900010 NOCOMMON 0 0 2218200900011 DATA 3 1 2218200900012 KT DATA ERR-T 2218200900013 KEV MB MB 2218200900014 30. 11.1 0.5 2218200900015 ENDDATA 3 0 2218200900016 ENDSUBENT 15 0 2218200999999 ENDENTRY 9 0 2218299999999