ENTRY 31557 20160708 31743155700000001 SUBENT 31557001 20160708 31743155700100001 BIB 16 44 3155700100002 TITLE Determination of the 54Fe(n,2n)53gFe and 3155700100003 54Fe(n,2n)53mFe cross sections averaged over a 235U 3155700100004 fission neutron spectrum 3155700100005 AUTHOR (S.Ribeiro Guevara,M.Arribere,A.J.Kestelman) 3155700100006 INSTITUTE (3ARGCAB) 3155700100007 REFERENCE (J,JRN,254,557,2002) 3155700100008 (J,JRN,256,385,2003) Erratum to JRN,254,557,2002. 3155700100009 FACILITY (REAC,3ARGCAB) in the RA-6 Research Reactor (MTR-type, 3155700100010 95% enriched fuel) 3155700100011 INC-SOURCE (REAC) 3155700100012 INC-SPECT In order to check that the neutron spectrum at the 3155700100013 irradiation position was an undisturbed 235U fission 3155700100014 neutron flux, several high-purity activation detectors,3155700100015 ranging in effective threshold energy from 2.6 to 3155700100016 13.4 MeV, were packed together and irradiated at that 3155700100017 position. 3155700100018 METHOD (ACTIV) Irradiation time 2 min. 3155700100019 First measurement 30 to 50 s after irr. and then 4 3155700100020 to 6 times with collecting tomes 2 to 4 min. 3155700100021 DETECTOR (HPGE) 67 cm3 Ortec HPGe intrinsic-N coaxial detector 3155700100022 which has a resolution of 2.0 keV FWHM at 1.33 MeV 3155700100023 SAMPLE (26-FE-54,ENR=0.558) Metallic iron, in powder form, 3155700100024 a disk 1 cm in diam. and 1 mm thick, with a sample mass3155700100025 of 100 mg. Isotopic composition 54Fe (54Fe: 55.8+-0.3%;3155700100026 56Fe: 44.+-0.3%; 57Fe: 0.2+-0.05%; 58Fe < 0.05%) 3155700100027 MONITOR ((MONIT1)26-FE-54(N,P)25-MN-54,,SIG) 3155700100028 ((MONIT2)28-NI-58(N,P)27-CO-58,,SIG) 3155700100029 DECAY-MON (25-MN-54,312.11D,DG,834.848,0.99976) 3155700100030 (27-CO-58-G,70.86D,DG,810.775,0.99448) 3155700100031 MONIT-REF (,J.H.Baard+,B,BAARD,,1989) J.H.Baard et al., 3155700100032 Nuclear Data Guide 3155700100033 for Reactor Neutron Metrology, Kluwer Academic 3155700100034 Publishers, Dordrecht, The Netherlands, 1989. 3155700100035 ERR-ANALYS (ERR-T) The following partial uncert. given: 3155700100036 (ERR-1) detector efficiency 2% 3155700100037 - Decay data 3155700100038 - Isotopic abundance 3155700100039 - neutron flux 3155700100040 - counting statistics 3155700100041 - fitting procedure. 3155700100042 STATUS (TABLE) Data taken from tbl.6 of main reference. 3155700100043 HISTORY (20051202C) SD 3155700100044 (20160509A) VS. Ref. JRN,256,385,2003 added.SAMPLE, 3155700100045 METHOD and ERR-ANALYS modified. 3155700100046 ENDBIB 44 0 3155700100047 COMMON 6 3 3155700100048 EN-MEAN MONIT1 MONIT1-ERR MONIT2 MONIT2-ERR ERR-1 3155700100049 MEV MB MB MB MB PER-CENT 3155700100050 1.5 81.7 2.2 111. 3. 2. 3155700100051 ENDCOMMON 3 0 3155700100052 ENDSUBENT 51 0 3155700199999 SUBENT 31557002 20160708 31743155700200001 BIB 4 4 3155700200002 REACTION (26-FE-54(N,2N)26-FE-53-G,,SIG,,FIS) 3155700200003 DECAY-DATA (26-FE-53-G,8.51MIN,DG,377.9,0.42) 3155700200004 ERR-ANALYS (ERR-2) gamma yield uncertainty - 7.1%. 3155700200005 HISTORY (20160509U) VS. ERR-ANALYS modified. 3155700200006 ENDBIB 4 0 3155700200007 NOCOMMON 0 0 3155700200008 DATA 3 1 3155700200009 DATA ERR-T ERR-2 3155700200010 MICRO-B MICRO-B PER-CENT 3155700200011 1.14 0.13 7.1 3155700200012 ENDDATA 3 0 3155700200013 ENDSUBENT 12 0 3155700299999 SUBENT 31557003 20160708 31743155700300001 BIB 3 4 3155700300002 REACTION (26-FE-54(N,2N)26-FE-53-M,,SIG,,FIS) 3155700300003 DECAY-DATA (26-FE-53-M,2.526MIN,DG,701.1,1.,DG,1011.5,0.86, 3155700300004 DG,1328.1,0.87,DG,2339.7,0.13) 3155700300005 HISTORY (20160509U) VS. ERR-ANALYS moved to 001. 3155700300006 ENDBIB 4 0 3155700300007 NOCOMMON 0 0 3155700300008 DATA 2 1 3155700300009 DATA ERR-T 3155700300010 MICRO-B MICRO-B 3155700300011 0.52 0.16 3155700300012 ENDDATA 3 0 3155700300013 ENDSUBENT 12 0 3155700399999 ENDENTRY 3 0 3155799999999