ENTRY 22801 20230514 2280100000001 SUBENT 22801001 20230514 20231011 2280100100001 BIB 14 73 2280100100002 TITLE Stellar neutron capture on 180-TA-m 2280100100003 I.cross section measurement between 10 keV and 100 keV2280100100004 AUTHOR (K.Wisshak,F.Voss,C.Arlandini,F.Becvar,O.Straniero, 2280100100005 R.Gallino,M.Heil,F.Kaeppeler,M.Krticka,S.Masera, 2280100100006 R.Reifarth,C.Travaglio) 2280100100007 INSTITUTE (2GERKFK) Wisshak, Voss, Arlandini, Heil, Kaeppeler, 2280100100008 (2ITYTUR) Gallino, Masera 2280100100009 (2GERHEI) Travaglio 2280100100010 (2ITYOAC) Straniero, Osservatorio astronomico di 2280100100011 Collurania, Italy 2280100100012 (1USALAN) Reifarth 2280100100013 (3CZRCHU) Becvar, Krticka 2280100100014 REFERENCE (J,PR/C,69,055801,2004) Main Reference 2280100100015 (J,PRL,87,251102,2001) Data for KT=30 keV 2280100100016 REL-REF (I,,F.Voss+,R,FZKA-6104,1998) Experimental and analysis2280100100017 details 2280100100018 (I,,D.Belic+,J,PR/C,65,035801,2002) Details of the 2280100100019 180Ta-m sample preparation 2280100100020 (M,,K.Wisshak+,P,INDC(GER)-048,3,200207) Abstracts. 2280100100021 Same as JUEL-3996,3,200207 Report 2280100100022 (I,22498001,F.Voss+,J,PR/C,59,1154,1999) 2280100100023 Experimental and analysis details 2280100100024 (M,22374001,K.Wisshak+,J,PR/C,48,1401,1993) - 2280100100025 method of total cross section and relative errors 2280100100026 calculation 2280100100027 (I,22372001,K.Wisshak+,J,PR/C,45,2470,1992) - 2280100100028 experimental details 2280100100029 (I,22195001,K.Wisshak+,J,PR/C,42,1731,1990) 2280100100030 - experimental details 2280100100031 (I,22372001,K.Wisshak+,J,PR/C,45,2470,1992) - 2280100100032 experimental details 2280100100033 FACILITY (VDG,2GERKFK) 3.75 MV Van de Graaff accelerator 2280100100034 pulse width is apprx. 1 ns, repetition rate 250 kHz, 2280100100035 average beam current 1.5-2 microAmperes 2280100100036 INC-SOURCE (P-LI7) Metallic Li target of about 1 mg/cm2 bombarded 2280100100037 with pulsed proton beam with energies 20 and 30 keV 2280100100038 above Li-7(p,n)Be-7 reaction threshold of 1881 keV 2280100100039 INC-SPECT .Continuous neutron spectra in the energy range 10-80 2280100100040 keV (20 keV protons) and 5-100 keV (30 keV protons) 2280100100041 giving neutrons in energy ranges 3-100, 3-225 keV. 2280100100042 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 2280100100043 DETECTOR (SCIN,D4PI) Karlsruhe 4Pi-Ba-F2 detector consisting of 2280100100044 29 hexagonal and 12 pentagonal crystals forming 2280100100045 a spherical Ba-F2 shell of 15 cm thickness and 10 cm 2280100100046 inner radius. Resolution is 7% at 2.5 MeV gamma 2280100100047 energy, peak efficiency 90% at 1 MeV 2280100100048 (GLASD) Li-6 glass detector as neutron flux monitor 2280100100049 SAMPLE 1.Standard sample Au-197, 11.5 mm diameter, 0.125 mm = 2280100100050 0.7427E-3 atoms/b thickness, weight 0.2523 gram, in a2280100100051 graphite container 22 mm diam, 3 mm thick, 2280100100052 1.8343 gram weight 2280100100053 2.Graphite dummy sample 22 mm diameter, 3 mm thick, 2280100100054 1.8702 gram weight, 2280100100055 3.Isotopically enriched Ta2-O5 oxide sample, weight 2280100100056 0.1501 gram, 180-m-Ta content is 5.5%, 11.5 mm diam, 2280100100057 0.7 mm = 0.3939E-3 atoms/barn, in a 22 mm diam, 3 mm 2280100100058 thick graphite container 1.8708 gram weight. 2280100100059 4.Natural tantalum sample for monitoring of isotopic 2280100100060 content of the irradiating sample, 11.5 mm diam, 2280100100061 0.7 mm = 0.3933 atoms/barn thick, weight 0.1499 gram 2280100100062 CORRECTION .Corrections were made for multiple scattering, 2280100100063 for isotopic impurities, for neutron self-absorption, 2280100100064 for undetected events, for signal/background ratio for2280100100065 different neutron energies 2280100100066 ADD-RES (THEO) Statistical model calculations with the help 2280100100067 of CASINO code 2280100100068 HISTORY (20030422C) S.M. 2280100100069 (20050204A) Data added from main reference - 5 Subents2280100100070 (20121229A) SD: EN-MEAN -> KT and values were corrected2280100100071 in Subents 7. ERR-ANALYS was update in all Subents. 2280100100072 Subent 2 deleted (value is already presented in Sub.7.2280100100073 Ref. on report was corrected (KFK- => FZKA-) 2280100100074 (20230514A) SD: Corrections in Subents 005, 006. 2280100100075 ENDBIB 73 0 2280100100076 NOCOMMON 0 0 2280100100077 ENDSUBENT 76 0 2280100199999 NOSUBENT 22801002 20121229 22342280100200001 SUBENT 22801003 20121229 22342280100300001 BIB 5 19 2280100300002 REACTION ((73-TA-180-M(N,G)73-TA-181,,SIG,,AV)/ 2280100300003 (79-AU-197(N,G)79-AU-198,,SIG,,AV)) Averaged over 2280100300004 energy interval given in data section 2280100300005 MONITOR .Absolute measurement 2280100300006 STATUS (TABLE) Data from Table III of PR/C,69,(5),055801 2280100300007 ERR-ANALYS (ERR-T) Total error includes ERR-S + ERR-SYS 2280100300008 (ERR-SYS) Total systematic error includes: 2280100300009 (ERR-1) Error due to flight path uncertainty 2280100300010 (ERR-2) Error due to neutron flux normalization 2280100300011 (ERR-6) Multiple scattering and self-shielding error 2280100300012 (ERR-3) Elemental impurity error 2280100300013 (ERR-4) Isotopic composition error 2280100300014 (ERR-5) Isotopic correction error 2280100300015 (ERR-7) Undetected events error 2280100300016 (ERR-8) Number of events with multiplicities >= 5 2280100300017 error 2280100300018 (ERR-9) Percentage of events with multiplicities >= 5 2280100300019 error 2280100300020 HISTORY (20121229A) SD: ERR-ANALYS update. 2280100300021 ENDBIB 19 0 2280100300022 COMMON 10 6 2280100300023 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 2280100300024 ERR-7 ERR-8 ERR-9 ERR-SYS 2280100300025 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2280100300026 PER-CENT PER-CENT PER-CENT PER-CENT 2280100300027 0.1 0.2 0.5 0.1 0.2 0.22280100300028 0.6 3.0 4.0 5.1 2280100300029 ENDCOMMON 6 0 2280100300030 DATA 5 10 2280100300031 EN-MIN EN-MAX DATA ERR-S ERR-T 2280100300032 KEV KEV NO-DIM PER-CENT PER-CENT 2280100300033 10. 12.5 3.54 39. 39. 2280100300034 12.5 15. 1.55 67. 67. 2280100300035 15. 20. 3.70 19. 20. 2280100300036 20. 25. 3.39 17. 18. 2280100300037 25. 30. 2.51 15. 16. 2280100300038 30. 40. 2.87 9.1 10. 2280100300039 40. 50. 2.38 9.1 10. 2280100300040 50. 60. 2.76 7.6 9.2 2280100300041 60. 80. 2.51 6.4 8.2 2280100300042 80. 100. 2.73 8.1 9.6 2280100300043 ENDDATA 12 0 2280100300044 ENDSUBENT 43 0 2280100399999 SUBENT 22801004 20121229 22342280100400001 BIB 6 16 2280100400002 REACTION ((73-TA-181(N,G)73-TA-182,,SIG,,AV)/ 2280100400003 (79-AU-197(N,G)79-AU-198,,SIG,,AV)) Averaged over 2280100400004 energy interval given in data section 2280100400005 MONITOR .Absolute measurement 2280100400006 METHOD (TOF) Flight path is 78.8 cm, resolution 1.2 ns/m 2280100400007 (GSPEC) 2280100400008 (STTA) Stack target irradiation 2280100400009 STATUS (TABLE) Data from Table III of PR/C,69,(5),055801 2280100400010 ERR-ANALYS (ERR-T) Total error includes ERR-S + ERR-SYS 2280100400011 (ERR-SYS) Total systematic error includes: 2280100400012 (ERR-1) Error due to flight path uncertainty 2280100400013 (ERR-2) Error due to neutron flux normalization 2280100400014 (ERR-3) Elemental impurity error 2280100400015 (ERR-6) Multiple scattering and self-shielding error 2280100400016 (ERR-7) Undetected events error 2280100400017 HISTORY (20121229A) SD: ERR-ANALYS update. 2280100400018 ENDBIB 16 0 2280100400019 COMMON 6 3 2280100400020 ERR-1 ERR-2 ERR-3 ERR-6 ERR-7 ERR-SYS 2280100400021 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2280100400022 0.1 0.2 0.1 0.2 0.4 0.52280100400023 ENDCOMMON 3 0 2280100400024 DATA 5 10 2280100400025 EN-MIN EN-MAX DATA ERR-S ERR-T 2280100400026 KEV KEV NO-DIM PER-CENT PER-CENT 2280100400027 10. 12.5 1.32 6.2 6.2 2280100400028 12.5 15. 1.43 5.7 5.7 2280100400029 15. 20. 1.39 3.4 3.4 2280100400030 20. 25. 1.44 2.9 2.9 2280100400031 25. 30. 1.37 2.4 2.5 2280100400032 30. 40. 1.33 1.7 1.8 2280100400033 40. 50. 1.30 1.6 1.7 2280100400034 50. 60. 1.26 1.6 1.7 2280100400035 60. 80. 1.25 1.4 1.5 2280100400036 80. 100. 1.25 2.4 2.5 2280100400037 ENDDATA 12 0 2280100400038 ENDSUBENT 37 0 2280100499999 SUBENT 22801005 20230514 20231011 2280100500001 BIB 6 18 2280100500002 REACTION (73-TA-180-M(N,G)73-TA-181,,SIG,,AV) Averaged over 2280100500003 energy interval given in data section 2280100500004 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 2280100500005 MONIT-REF (22099002,W.Ratynski+,J,PR/C,37,595,1988) 2280100500006 (,R.L.Macklin,W,MACKLIN,1982) 2280100500007 The experimental ratios were converted into absolute 2280100500008 cross sections by means of the gold cross section of 2280100500009 Macklin (priv.comm.), after normalization by a factor 2280100500010 of 0.989 to the absolute value of Ratynski et. al. 2280100500011 STATUS (TABLE,,K.Wisshak,J,PR/C,69,055801,2004) Table IV 2280100500012 (DEP,22588003) see MONIT-REF 2280100500013 ERR-ANALYS (DATA-ERR) Total uncertainty from ratio. 2280100500014 Uncertainties of cross-sections can be calculated from 2280100500015 the uncertainty of the cross-section ratio by adding 2280100500016 quadratically the 1.5% uncertainty of the gold standard2280100500017 (MONIT-ERR) Uncertainty of the gold standard 2280100500018 HISTORY (20121229A) SD: ERR-ANALYS update. 2280100500019 (20230514A) SD: MONIT-ERR deleted from DATA section. 2280100500020 ENDBIB 18 0 2280100500021 COMMON 1 3 2280100500022 MONIT-ERR 2280100500023 PER-CENT 2280100500024 1.5 2280100500025 ENDCOMMON 3 0 2280100500026 DATA 5 10 2280100500027 EN-MIN EN-MAX DATA DATA-ERR MONIT 2280100500028 KEV KEV MB MB MB 2280100500029 10. 12.5 3772. 1470. 1067. 2280100500030 12.5 15. 1360. 911. 878. 2280100500031 15. 20. 2736. 547. 739. 2280100500032 20. 25. 2036. 366. 600. 2280100500033 25. 30. 1431. 229. 571. 2280100500034 30. 40. 1435. 143. 500. 2280100500035 40. 50. 1032. 103. 433. 2280100500036 50. 60. 1076. 99. 390. 2280100500037 60. 80. 877. 72. 349. 2280100500038 80. 100. 813. 78. 298. 2280100500039 ENDDATA 12 0 2280100500040 ENDSUBENT 39 0 2280100599999 SUBENT 22801006 20230514 20231011 2280100600001 BIB 6 17 2280100600002 REACTION (73-TA-181(N,G)73-TA-182,,SIG,,AV) 2280100600003 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 2280100600004 MONIT-REF (22099002,W.Ratynski+,J,PR/C,37,595,1988) 2280100600005 (,R.L.Macklin,W,MACKLIN,1982) 2280100600006 The experimental ratios were converted into absolute 2280100600007 cross sections by means of the gold cross section of 2280100600008 Macklin (priv.comm.), after normalization by a factor 2280100600009 of 0.989 to the absolute value of Ratynski et. al. 2280100600010 STATUS (TABLE,,K.Wisshak,J,PR/C,69,055801,2004) Table IV 2280100600011 (DEP,22801004) 2280100600012 ERR-ANALYS (DATA-ERR) Total uncertainty from ratio. 2280100600013 Uncertainties of cross-sections can be calculated from 2280100600014 the uncertainty of the cross-section ratio by adding 2280100600015 quadratically the 1.5% uncertainty of the gold standard2280100600016 (MONIT-ERR) Uncertainty of the gold standard 2280100600017 HISTORY (20121229A) SD: BIB update. ERR-T -> DATA-ERR 2280100600018 (20230514A) SD: MONIT-ERR deleted from DATA section. 2280100600019 ENDBIB 17 0 2280100600020 COMMON 1 3 2280100600021 MONIT-ERR 2280100600022 PER-CENT 2280100600023 1.5 2280100600024 ENDCOMMON 3 0 2280100600025 DATA 5 10 2280100600026 EN-MIN EN-MAX DATA DATA-ERR MONIT 2280100600027 KEV KEV MB MB MB 2280100600028 10. 12.5 1408. 90. 1067. 2280100600029 12.5 15. 1225. 74. 878. 2280100600030 15. 20. 1027. 38. 739. 2280100600031 20. 25. 864. 28. 600. 2280100600032 25. 30. 780. 23. 571. 2280100600033 30. 40. 664. 16. 500. 2280100600034 40. 50. 562. 13. 433. 2280100600035 50. 60. 493. 11. 390. 2280100600036 60. 80. 436. 9. 349. 2280100600037 80. 100. 374. 11. 298. 2280100600038 ENDDATA 12 0 2280100600039 ENDSUBENT 38 0 2280100699999 SUBENT 22801007 20121229 22342280100700001 BIB 7 27 2280100700002 REACTION (73-TA-180-M(N,G)73-TA-181,,SIG,,MXW,DERIV) Derived 2280100700003 from measured and calculated cross section values 2280100700004 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 2280100700005 ANALYSIS .Averaging in the 0 - 700 keV interval was made in 2280100700006 three steps: I-1 -> 0-20 keV, I-2 -> 20 - 100 keV 2280100700007 and I-3 -> 100 - 700 keV. Step I-2 corresponds to the 2280100700008 measured values. I-1 and I-3 are taken from calculated2280100700009 results normalized to the present measurements 2280100700010 STATUS (TABLE) Data from Table VI of PR/C,69,(5),055801 2280100700011 (DEP,22801003) 2280100700012 (DEP,22801006) 2280100700013 MISC-COL (MISC1) I-1 2280100700014 (MISC2) I-2 2280100700015 (MISC3) I-3 2280100700016 ERR-ANALYS (ERR-T) Uncertainty of Maxwellian-averaged 2280100700017 cross-section 2280100700018 The uncertainty of 1.5% of the gold standard is not 2280100700019 included in the quoted uncertainty since it cancels 2280100700020 out in most applications of relevance for nuclear 2280100700021 astrophysics 2280100700022 (ERR-S) Statistical error 2280100700023 (ERR-SYS) The overall systematic uncertainties of the 2280100700024 Maxwellian averaged cross sections include the 2280100700025 uncertainties of the cross-section ratios and of the 2280100700026 extrapolated components, I-1 and I-3. 2280100700027 HISTORY (20121229A) SD: EN-MEAN -> KT and values were corrected2280100700028 BIB update. 2280100700029 ENDBIB 27 0 2280100700030 NOCOMMON 0 0 2280100700031 DATA 11 14 2280100700032 KT DATA ERR-S ERR-SYS ERR-T MISC1 2280100700033 MISC1-ERR MISC2 MISC2-ERR MISC3 MISC3-ERR 2280100700034 KEV MB MB MB MB MB 2280100700035 MB MB MB MB MB 2280100700036 8. 3059. 185. 156. 242. 2550. 2280100700037 178. 509. 50. 0. 2280100700038 10. 2695. 153. 137. 205. 2009. 2280100700039 140. 686. 61. 0. 2280100700040 15. 2143. 109. 109. 154. 1211. 2280100700041 84. 926. 70. 6.0 0.3 2280100700042 20. 1824. 88. 93. 128. 803. 2280100700043 56. 992. 68. 29. 1.5 2280100700044 25. 1613. 75. 82. 111. 569. 2280100700045 40. 974. 63. 70. 3.5 2280100700046 30. 1465. 66. 75. 100. 424. 2280100700047 30. 920. 58. 121. 6.1 2280100700048 40. 1269. 52. 65. 83. 261. 2280100700049 18. 781. 47. 227. 11. 2280100700050 50. 1145. 43. 58. 72. 176. 2280100700051 12. 650. 38. 319. 16. 2280100700052 52. 1125. 42. 57. 71. 165. 2280100700053 12. 626. 37. 334. 17. 2280100700054 60. 1058. 39. 54. 67. 127. 2280100700055 8.9 541. 32. 390. 20. 2280100700056 70. 993. 35. 51. 62. 95.8 2280100700057 6.7 454. 26. 443. 22. 2280100700058 80. 942. 33. 48. 58. 74.9 2280100700059 5.2 385. 22. 482. 24. 2280100700060 90. 900. 32. 46. 56. 60.1 2280100700061 4.2 330. 19. 510. 26. 2280100700062 100. 863. 31. 44. 54. 49.3 2280100700063 3.5 285. 16. 529. 26. 2280100700064 ENDDATA 32 0 2280100700065 ENDSUBENT 64 0 2280100799999 ENDENTRY 7 0 2280199999999