ENTRY 23050 20130310 22352305000000001 SUBENT 23050001 20130310 22352305000100001 BIB 13 68 2305000100002 REFERENCE (C,2007NICE,2,1007,200704) 2305000100003 #doi:10.1051/ndata:07628 2305000100004 (J,EPJ/CS,35,01003,2012) 2305000100005 #doi:10.1051/epjconf/20123501003 2305000100006 Review of AMS data. Ni-60(n,2n) CS on Fig.3 . 2305000100007 AUTHOR (A.Wallner, K.Knie, T.Faestermann, G.Korschinek, 2305000100008 W.Kutschera, W.Rochow, G.Rugel, H.Vonach) 2305000100009 TITLE Study of the Ni-60(n,2n)Ni-59 reaction from threshold 2305000100010 to 20 MeV. 2305000100011 INSTITUTE (2AUSVIE) A.Wallner, K.Knie, W.Kutschera, H.Vonach. 2305000100012 (2GERMUN) T.Faestermann, G.Korschinek, K.Knie, G.Rugel.2305000100013 (2GERTUE) W.Rochow. 2305000100014 REL-REF (M,,A.Wallner,T,WALLNER,2000) Main parameters for the 2305000100015 neutron irradiation of the Ni samples used for the 2305000100016 60Ni(n,2n)59Ni measurement 2305000100017 (R,,G.Rugel+,J,NIM/B,259,683,2007) Reference for ASSUM12305000100018 (R,13947007,S.Raman+,J,PR/C,70,044318,2004) Ref. for 2305000100019 ASSUM2. 2305000100020 FACILITY (VDG,2GERTUE)Single-ended 3MV Van-de-Graaff accelerator2305000100021 (ACCEL,2GERMUN) AMS setup in Munich Maier-Leibnitz Lab.2305000100022 based on 14 MV tandem accelerator.Combination of large2305000100023 accelerator and dedicated particle detection system 2305000100024 featuring a time-of-flight system, a gas-filled magnet 2305000100025 and multi-anode ionization chamber fulfills the 2305000100026 requirement of sensitive Ni-59 detection. 2305000100027 INC-SOURCE (D-T) Ti-T target was bombarded with 1.2 and 2.6 MeV 2305000100028 deuterons to produce 17 and 19 MeV neutrons. 2305000100029 INC-SPECT 17-MeV neutron fluence (1.48 +-0.07)*10**12 n/cm**2, 2305000100030 irradiation time 4 days. 2305000100031 19-MeV neutron fluence (1.38+-0.06)*10**12 n/cm**2, 2305000100032 irradiation time 8 days. 2305000100033 SAMPLE Ni samples served in previous experiment as fluence 2305000100034 monitor,when irradiating Al samples for the measurement2305000100035 of Al-27(n,2n) Al-26 cross sections at 17 and 19 MeV 2305000100036 ( see REL-REF A.Wallner,T,,2000 ). 2305000100037 Natural Ni samples with a thickness of 0.125 mm, 10 mm 2305000100038 diameter. Distance between neutron-producing target 2305000100039 and Ni foil 14 mm. Positioned at 0 deg relative to 2305000100040 incoming d+ beam. 2305000100041 DETECTOR (SCIN) Time history of relative flux monitored with 2305000100042 scintillation counter positioned under 108 deg relative2305000100043 incoming d+ beam in distance of about 3 m. 2305000100044 (HPGE) 122 keV gamma-line was measured with HP-Ge-diode2305000100045 to determine the activity of irradiated Ni samples. 2305000100046 Self absorption of photons in Ni foil was negligible. 2305000100047 METHOD (PSD) Pulse shape discrimination for neutron-gamma 2305000100048 discrimination. 2305000100049 Production of Ni-59 via (n,gamma) on Ni-58 from 2305000100050 thermalized neutrons was negligible. 2305000100051 (ACTIV) Activation technique combined with 2305000100052 (AMS) accelerator mass spectrometry. 2305000100053 Four independent AMS measurement were performed. 2305000100054 Standard samples (produced via irradiation of natural 2305000100055 nickel powder with thermal neutrons) served as 2305000100056 reference material for the final isotope ratios. 2305000100057 Isotope ratio was calculated from activity measurements2305000100058 relative using thermal neutron cross section of Ni-64, 2305000100059 sig-gamma=1.52+-0.03 b, and taking into account thermal2305000100060 cross section of Ni-58 , sig-gamma=4.13+-0.05 b. 2305000100061 Ni-59/Ni isotope ratio of standard material was 2305000100062 determined to (9.1+-0.4)*10**-11 . 2305000100063 ASSUMED (ASSUM1,28-NI-64(N,G)28-NI-65,,SIG) Thermal c-s. 2305000100064 (ASSUM2,28-NI-58(N,G)28-NI-59,,SIG) Thermal c-s. 2305000100065 HISTORY (20090107C) M.M. 2305000100066 (20110206U) SD: DOI identifier was corrected. 2305000100067 (20130310U) M.M. Reference J,EPJ/CS,35,01003,2012 was 2305000100068 added. Volume number and year in 2007NICE reference 2305000100069 were corrected. 2305000100070 ENDBIB 68 0 2305000100071 COMMON 4 3 2305000100072 ASSUM1 ASSUM1-ERR ASSUM2 ASSUM2-ERR 2305000100073 B B B B 2305000100074 1.52 0.03 4.13 0.05 2305000100075 ENDCOMMON 3 0 2305000100076 ENDSUBENT 75 0 2305000199999 SUBENT 23050002 20130310 22352305000200001 BIB 9 20 2305000200002 REACTION (28-NI-60(N,2N)28-NI-59,,SIG) 2305000200003 MONITOR ((MONIT)28-NI-58(N,X)27-CO-57,,SIG) 2305000200004 For fluence determination. Measured directly via 2305000200005 induced activity in samples. 2305000200006 ANALYSIS Contribution of Co-57 produced through Ni-58(n,2n) 2305000200007 reaction with consecutive decay of Ni-58 was taken into2305000200008 account. 2305000200009 MISC-COL (MISC) Ni-59/Ni-60 ratio. 2305000200010 ADD-RES (DECAY) Half-life of Ni-59 is discussed. ( 97+-9 )kyr 2305000200011 value was deduced from measured value (108+-13) kyr 2305000200012 from REL-REF W.Ruehm+ using the newest available data 2305000200013 for cross sections and conversion coefficient yield. 2305000200014 REL-REF (N,,W.Ruehm+,J,PSPS,42,227,1994) 2305000200015 ERR-ANALYS (DATA-ERR)Largely dominated by AMS isotope ratio 2305000200016 measurement. 2305000200017 STATUS (TABLE) Table 2 of C,2007NICE,2,1007,2007 2305000200018 HISTORY (20130310A) MONITOR was corrected according to the 2305000200019 comment of N.Otsuka : 2305000200020 (NI-58(N,N+P)27-CO-57,,SIG)+(NI-58(N,D)27-CO-57,,SIG) 2305000200021 -> (NI-58(N,X)27-CO-57,,SIG) 2305000200022 ENDBIB 20 0 2305000200023 NOCOMMON 0 0 2305000200024 DATA 8 2 2305000200025 EN EN-RSL-FW DATA DATA-ERR MONIT MONIT-ERR 2305000200026 MISC MISC-ERR 2305000200027 MEV MEV MB MB MB MB 2305000200028 NO-DIM NO-DIM 2305000200029 17.0 0.23 601. 82. 864. 35. 2305000200030 0.89E-12 0.11E-12 2305000200031 19.0 0.27 779. 78. 904. 33. 2305000200032 1.08E-12 0.10E-12 2305000200033 ENDDATA 8 0 2305000200034 ENDSUBENT 33 0 2305000299999 ENDENTRY 2 0 2305099999999