ENTRY 22971 20211025 230522971 0 1 SUBENT 22971001 20211025 230522971 1 1 BIB 11 56 22971 1 2 TITLE Measurement of (n,gamma) reaction cross sections 22971 1 3 at stellar energies for 58Ni and 78Se 22971 1 4 AUTHOR (G.Rugel, I.Dillmann, T.Faestermann, M.Heil, 22971 1 5 F.Kaeppeler, K.Knie, G.Korschinek, W.Kutschera, 22971 1 6 M.Poutivtsev, A.Wallner, 22971 1 7 P.Ludwig, L.Fimiani, K.Hain) 22971 1 8 REFERENCE (J,NIM/B,259,683,2007) 22971 1 9 #doi:10.1016/j.nimb.2007.01.206 22971 1 10 (R,INDC(GER)-0053,2021) Revised values of Karlsruhe 22971 1 11 cross sections. 22971 1 12 Preliminary results for Ni-58 and Se-78 22971 1 13 (J,PR/C,95,035803,2017) Final data for Ni-58 22971 1 14 #doi:10.1103/PhysRevC.95.035803 22971 1 15 First author P.Ludwig. Title: 'Measurement of the 22971 1 16 stellar 58Ni(n,gamma)59Ni cross section with 22971 1 17 accelerator mass spectrometry' 22971 1 18 INSTITUTE (2GERMUN) Fakultaet fuer Physik, Technische Universi- 22971 1 19 taet Muenchen, 85747 Garching, Germany. G.Rugel (Cor-22971 1 20 responding author, Email address:grugel@ph.tum.de), 22971 1 21 T.Faestermann, K.Knie, G.Korschinek, M.Poutivtsev, 22971 1 22 A. Wallner, P.Ludwig, L.Fimiani, K.Hain 22971 1 23 (2GERKFK) Institut fuer Kernphysik, Forschungszentrum 22971 1 24 Karlsruhe, Germany. I.Dillmann, M.Heil,F.Kaeppeler 22971 1 25 (2SWTBAS) Department fuer Physik und Astronomie, 22971 1 26 Universitaet Basel, Switzerland. I.Dillmann 22971 1 27 (2AUSIRK) Vienna Environmental Research Accelerator 22971 1 28 (VERA), Institut fuer Isotopenforschung und Kernphys. 22971 1 29 A-1090 Wien, Austria. W. Kutschera, A. Wallner 22971 1 30 FACILITY (VDG,2GERKFK) 3.7 MV Van de Graaff accelerator, 22971 1 31 average beam current 100 uA, proton energy 22971 1 32 1912 keV, 30 keV above reaction Li-7(p,n)Be-7 22971 1 33 INC-SOURCE (P-LI7) Protons bombarding um thick metallic 22971 1 34 lithium layer on copper water-cooled backing 22971 1 35 INC-SPECT Quasi-stellar near-Maxwellian distribution with kT = 22971 1 36 25+-0.5 keV and maximal neutron energy 106 keV. 22971 1 37 METHOD (ACTIV) Auxiliary activation method for neutron flux 22971 1 38 determination with the help of Au-197(n,gamma) 22971 1 39 (AMS) Accelerator mass spectrometry performed on the 22971 1 40 AMS system at the Munich MUN Institute 22971 1 41 (TOF) For accelerator mass separation 22971 1 42 Samples were sandwiched between 10-30 um thick gold 22971 1 43 foils in close geometry to Li-7 target 22971 1 44 MONITOR (79-AU-197(N,G)79-AU-198,,SIG,,SPA) 22971 1 45 REL-REF (R,,Z.Chunmei,J,NDS,95,59,2002) Decay constants for 22971 1 46 monitor Au-197 22971 1 47 (M,22959001,H.Nassar+,J,PRL,94,092504,2005) Details of 22971 1 48 experiment and AMS method analysis 22971 1 49 HISTORY (20071014C) SM 22971 1 50 (20120120A) NDS(VZ): REL-REF: ND/B->NDS 22971 1 51 (20170404A) M.M. Ref. PR/C,95,035803,2017 was added. 22971 1 52 Subents 004-005 were added 22971 1 53 (20190320U) SD: Second title moved under second ref. 22971 1 54 in Subent 001. Pointers used in TITLE and REF. deleted22971 1 55 (20200120U) SD: SAMPLE corrected in Subent 002. 22971 1 56 (20211025A) SD: Corrections in several Subents. 22971 1 57 Subent 006 added. 22971 1 58 ENDBIB 56 0 22971 1 59 NOCOMMON 0 0 22971 1 60 ENDSUBENT 59 0 22971 199999 SUBENT 22971002 20200120 228522971 2 1 BIB 9 24 22971 2 2 REACTION (28-NI-58(N,G)28-NI-59,,SIG,,SPA) 22971 2 3 SAMPLE Natural metallic Nickel sample, Ni-58 content is 22971 2 4 68.077%. Mass 47.3 milligram, Ni-58 number 3.30E+20 22971 2 5 (28-NI-58,NAT=0.68077) 22971 2 6 MONIT-REF (,W.Ratynski+,J,PR/C,37,595,1988) 22971 2 7 DECAY-MON (79-AU-198-G,2.69517D,DG,412.,0.9558) 22971 2 8 ASSUMED (ASSUM1,28-NI-58(N,G)28-NI-59,,SIG) For thermal 22971 2 9 neutrons 22971 2 10 (ASSUM2,28-NI-64(N,G)28-NI-65,,SIG) For thermal 22971 2 11 neutrons 22971 2 12 REL-REF (R,13947002,S.Raman+,J,PR/C,70,044318,2004) 22971 2 13 Ni-58 (n,gamma) thermal cross sections 22971 2 14 (R,20625016,E.M.Gryntakis+,J,JRC,46,159,1978) 22971 2 15 Ni-64 (n,gamma) thermal cross sections 22971 2 16 (D,V0102085,Z.Y.Bao+,J,AND,76,70,2000) 22971 2 17 ERR-ANALYS (ERR-T) Includes statistical, standard and 22971 2 18 systematical uncertainties. 22971 2 19 (ERR-1) Time-integrated neutron flux error 22971 2 20 STATUS (PRELM) By the authors 22971 2 21 (TABLE) Table 2 of Nucl.Instrum.Meth.,B259(2007)683 22971 2 22 (SPSDD,22971004) Superseded by newer data. 22971 2 23 HISTORY (20170404A) M.M. ERR-ANALYS, SPSDD were added. 22971 2 24 MXW -> SPA . REL-REF of E.M.Gryntakis+ was added. 22971 2 25 (20200120U) SD: SAMPLE corrected. 22971 2 26 ENDBIB 24 0 22971 2 27 COMMON 3 3 22971 2 28 KT KT-ERR ERR-1 22971 2 29 KEV KEV PER-CENT 22971 2 30 25. 0.5 3. 22971 2 31 ENDCOMMON 3 0 22971 2 32 DATA 6 1 22971 2 33 DATA ERR-T ASSUM1 ASSUM1-ERR ASSUM2 ASSUM2-ERR 22971 2 34 MB MB MB MB MB MB 22971 2 35 27.2 2.1 4.13 0.05 1.52 0.03 22971 2 36 ENDDATA 3 0 22971 2 37 ENDSUBENT 36 0 22971 299999 SUBENT 22971003 20211025 230522971 3 1 BIB 9 22 22971 3 2 REACTION (34-SE-78(N,G)34-SE-79,,SIG,,SPA) 22971 3 3 SAMPLE Cd-Se compound, mass 216.8 milligram, Se-78 1.62E+20 22971 3 4 Se-78 content 23.77%, Se-74 content 0.87%, 22971 3 5 Se-80 - 46.9% 22971 3 6 Second sample was enriched to 98.8% in Se-78 and 22971 3 7 depleted to 0.01% in Se-74 - used at AMS 22971 3 8 MONIT-REF (22099002,W.Ratynski+,J,PR/C,37,595,1988) 22971 3 9 DECAY-MON (79-AU-198-G,2.69517D,DG,412.,0.9558) 22971 3 10 ASSUMED (ASSUM,34-SE-78(N,G)34-SE-79,,SIG) For thermal neutrons22971 3 11 REL-REF (R,,S.F.Mughabghab+,B,NEUT.CS 1A,,,1981) Se-78(n,gamma)22971 3 12 cross section for thermal neutrons 22971 3 13 (D,,Z.Y.Bao+,J,AND,76,70,2000) 22971 3 14 ERR-ANALYS (DATA-ERR) Not specified 22971 3 15 (ERR-1) Time-integrated neutron flux error 22971 3 16 (MONIT-ERR) Uncertainty in monitor reaction 22971 3 17 STATUS (TABLE) Table 2 of Nucl.Instrum.Meth.,B259(2007)683 22971 3 18 (SPSDD,22971006) Renormalized. 22971 3 19 HISTORY (20170404A) M.M.Correction of free text and ERR-ANALYS.22971 3 20 ASSUM value corrected as given on page 686. 22971 3 21 MXW -> SPA. 22971 3 22 (20211025A) SD: KT -> KT-DUMMY. MONIT/ERR added. 22971 3 23 Subent superseded. 22971 3 24 ENDBIB 22 0 22971 3 25 COMMON 5 3 22971 3 26 KT-DUMMY KT-ERR ERR-1 MONIT MONIT-ERR 22971 3 27 KEV KEV PER-CENT MB MB 22971 3 28 25. 0.5 3. 586. 8. 22971 3 29 ENDCOMMON 3 0 22971 3 30 DATA 4 1 22971 3 31 DATA DATA-ERR ASSUM ASSUM-ERR 22971 3 32 MB MB MB MB 22971 3 33 61. 10. 0.43 0.02 22971 3 34 ENDDATA 3 0 22971 3 35 ENDSUBENT 34 0 22971 399999 SUBENT 22971004 20211025 230522971 4 1 BIB 8 33 22971 4 2 REACTION (28-NI-58(N,G)28-NI-59,,SIG,,SPA) 22971 4 3 SAMPLE Natural nickel metallic powder three samples. 22971 4 4 Two samples were irradiated ~ 6 days at first run 22971 4 5 3rd sample irradiated ~5 days three years later. 22971 4 6 Sample N(Ni58) Diameter Flux-total 22971 4 7 10**20atoms mm 10**14 n 22971 4 8 Ni-1 1.652 8 8.73 22971 4 9 Ni-2 1.649 8 8.50 22971 4 10 Ni-3 5.307 6 9.23 22971 4 11 DECAY-MON (79-AU-198-G,2.6941D,DG,411.8,0.9558) 95.58+-0.12% 22971 4 12 CORRECTION For self-absorption in Au samples - factor 0.995 22971 4 13 For decay during irradiation and variations in the 22971 4 14 neutron flux. 22971 4 15 FLAG (1.) Measurement by sample Ni-1 22971 4 16 (2.) Measurement by sample Ni-2 22971 4 17 (3.) Measurement by sample Ni-3 22971 4 18 (4.) Weighted average of three sample runs 22971 4 19 ERR-ANALYS (ERR-T) Total uncertainty propagated from 22971 4 20 (ERR-SYS) Systematic uncertainty due to 22971 4 21 - 197Au cross section (1.4%) 22971 4 22 - Detector efficiency (2.0%) 22971 4 23 - 198Au gamma ray intensity (0.13%) 22971 4 24 - AMS standard (4.1%) 22971 4 25 - 22971 4 26 (ERR-S) Statistical uncertainty due to 22971 4 27 - Sample position in activation (1.5%) 22971 4 28 - Sample mass (197Au) (0.3%) 22971 4 29 - counting statistics (198Au) (0.25%) 22971 4 30 - statistical error (Ni-1,N-2,Ni-3) 22971 4 31 -(5.5-13.5%) 22971 4 32 (MONIT-ERR) Uncertainty in monitor reaction 22971 4 33 STATUS (TABLE) Table V from Phys.Rev.,C95(2017)035803 22971 4 34 HISTORY (20211025A) SD: KT -> KT-DUMMY. 22971 4 35 ENDBIB 33 0 22971 4 36 COMMON 4 3 22971 4 37 KT-DUMMY KT-ERR MONIT MONIT-ERR 22971 4 38 KEV KEV MB MB 22971 4 39 25. 0.5 632. 9. 22971 4 40 ENDCOMMON 3 0 22971 4 41 DATA 4 4 22971 4 42 DATA ERR-SYS ERR-S FLAG 22971 4 43 MB MB MB NO-DIM 22971 4 44 30.4 2.3 4.1 1. 22971 4 45 29.0 2.2 1.1 2. 22971 4 46 32.2 2.5 1.8 3. 22971 4 47 29.9 2.3 0.9 4. 22971 4 48 ENDDATA 6 0 22971 4 49 ENDSUBENT 48 0 22971 499999 SUBENT 22971005 20211025 230522971 5 1 BIB 6 16 22971 5 2 REACTION (28-NI-58(N,G)28-NI-59,,SIG,,MXW) 22971 5 3 ANALYSIS Multiplication of ENDF/B-VII.1 kT=30 keV MACS by 22971 5 4 0.90, which the ratio of the measured kT=25 keV 22971 5 5 SACS (29.9 mb) to the ENDF/B-VII.1 kT=25 keV 22971 5 6 SACS (33.3 mb). 22971 5 7 ERR-ANALYS (ERR-S) Total statistical 22971 5 8 (ERR-SYS) Total systematical 22971 5 9 ADD-RES Calculated MACS using ENDF/B-VII.1 : 22971 5 10 kT,keV MACS kT,keV MACS 22971 5 11 5. 34.7 40. 26.7 22971 5 12 10. 43.2 50. 24.2 22971 5 13 15. 40.1 60. 22.2 22971 5 14 20. 36.2 80. 19.5 22971 5 15 25. 32.9 100. 17.5 22971 5 16 STATUS (TABLE) Table VII of Phys.Rev.,C95(2017)035803 22971 5 17 HISTORY (20211025A) SD: ASSUMED deleted. 22971 5 18 ENDBIB 16 0 22971 5 19 NOCOMMON 0 0 22971 5 20 DATA 4 1 22971 5 21 KT DATA ERR-SYS ERR-S 22971 5 22 KEV MB MB MB 22971 5 23 30. 30.4 2.3 0.9 22971 5 24 ENDDATA 3 0 22971 5 25 ENDSUBENT 24 0 22971 599999 SUBENT 22971006 20211025 230522971 6 1 BIB 11 21 22971 6 2 REACTION 1((34-SE-78(N,G)34-SE-79,,SIG,,SPA)/ 22971 6 3 (79-AU-197(N,G)79-AU-198,,SIG,,SPA)) 22971 6 4 2(34-SE-78(N,G)34-SE-79,,SIG,,SPA) 22971 6 5 SAMPLE Cd-Se compound, mass 216.8 milligram, Se-78 1.62E+20 22971 6 6 Se-78 content 23.77%, Se-74 content 0.87%, 22971 6 7 Se-80 - 46.9% 22971 6 8 Second sample was enriched to 98.8% in Se-78 and 22971 6 9 depleted to 0.01% in Se-74 - used at AMS 22971 6 10 ANALYSIS Cross section value in Subent 22971.003 is 22971 6 11 renormalized for new gold cross section 22971 6 12 DECAY-MON (79-AU-198-G,3881.0MIN,DG,411.80,0.9558) 22971 6 13 MONIT-REF (,R.Reifarth+,J,EPJ/P,133,424,2018) 22971 6 14 CORRECTION Correction for revised gold standard: 622.7/586 =1.06222971 6 15 ASSUMED (ASSUM,34-SE-78(N,G)34-SE-79,,SIG) For thermal neutrons22971 6 16 REL-REF (R,,S.F.Mughabghab+,B,NEUT.CS 1A,,,1981) Se-78(n,gamma)22971 6 17 cross section for thermal neutrons 22971 6 18 ERR-ANALYS (DATA-ERR) Not specified 22971 6 19 (ERR-1) Time-integrated neutron flux error 22971 6 20 (MONIT-ERR) Uncertainty in monitor reaction 22971 6 21 STATUS (TABLE) Table on p.253 of INDC(GER)-0053 22971 6 22 HISTORY (20170404C) SD 22971 6 23 ENDBIB 21 0 22971 6 24 COMMON 5 3 22971 6 25 KT-DUMMY KT-ERR ERR-1 MONIT MONIT-ERR 22971 6 26 KEV KEV PER-CENT MB MB 22971 6 27 25. 0.5 3. 622.7 6. 22971 6 28 ENDCOMMON 3 0 22971 6 29 DATA 6 1 22971 6 30 DATA 1DATA-ERR 1DATA 2DATA-ERR 2ASSUM ASSUM-ERR 22971 6 31 NO-DIM NO-DIM MB MB MB MB 22971 6 32 0.104 0.017 65. 11. 0.43 0.02 22971 6 33 ENDDATA 3 0 22971 6 34 ENDSUBENT 33 0 22971 699999 ENDENTRY 6 0 2297199999999