ENTRY 14827 20240619 1482700000001 SUBENT 14827001 20240619 20250110 1482700100001 BIB 13 34 1482700100002 TITLE Measurements with the Niobium Neutron Fluence 1482700100003 Detector at the PTB 1482700100004 AUTHOR (W.G.Alberts,R.Hollnagel,K.Knauf,M.Matzke,W.Pessara) 1482700100005 REFERENCE (C,82GAITHERS,1,433,1982) 1482700100006 REL-REF (A,,F.Hegedus,R,EIR-195,1971) 1482700100007 (A,,K.Sakurai+,J,NIM,187,649,1981) 1482700100008 INSTITUTE (2GERPTB) 1482700100009 INC-SOURCE (CF252) Spontaneous fission source of Cf-252. 1482700100010 INC-SPECT Neutron source strength of 2.3*10**8 s-1. The flux 1482700100011 density was monitored with by indium foils, using the 1482700100012 the average result of the two In foils yielding a 1482700100013 flux of 3.7*10**7 cm-2 s-1. 1482700100014 DETECTOR (GELI) 1482700100015 SAMPLE Metallic niobium foils of 10 mm diameter and 28 1482700100016 micrometer thickness. 1482700100017 METHOD (ACTIV) The activity of thick metallic niobium foils 1482700100018 after irradiation with 252Cf spontaneous fission 1482700100019 neutrons was derived by measuring the emitted 16.6 1482700100020 keV XKalpha-rays with a calibrated Ge detector 1482700100021 considering self-absorption in the foils. The 1482700100022 irradiation time was about 40 days and the neutron 1482700100023 fluence 1.2*10**14 cm-2. 1482700100024 ERR-ANALYS (ERR-T) The uncertainty was calculated by quadratic 1482700100025 summation of individual contributions as 7.0%. 1482700100026 (ERR-S,,3.5) Count rate of foil 5:3% and standard:0.5%.1482700100027 (ERR-1) Activity of standard. 1482700100028 (ERR-2) Sample detector distance. 1482700100029 (ERR-3) Self absorption. 1482700100030 (ERR-4) 93Nbm half life. 1482700100031 (ERR-5) Indium cross section. 1482700100032 (ERR-6) Indium activity. 1482700100033 (ERR-7) Flux determination at Nb foil position. 1482700100034 DECAY-DATA (41-NB-93-M,16.0YR) 1482700100035 HISTORY (20240619C) BP 1482700100036 ENDBIB 34 0 1482700100037 COMMON 8 6 1482700100038 EN-DUMMY ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 1482700100039 ERR-6 ERR-7 1482700100040 MEV PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 1482700100041 PER-CENT PER-CENT 1482700100042 2.13 1.3 0.8 3.3 3.1 2.51482700100043 2.5 2.0 1482700100044 ENDCOMMON 6 0 1482700100045 ENDSUBENT 44 0 1482700199999 SUBENT 14827002 20240619 20250110 1482700200001 BIB 2 3 1482700200002 REACTION (41-NB-93(N,INL)41-NB-93-M,,SIG,,FIS) 1482700200003 STATUS (TABLE,,W.G.Alberts+,C,82GAITHERS,1,433,1982) 1482700200004 Table 3, page 440 of C,82WASH,1,433,1982. 1482700200005 ENDBIB 3 0 1482700200006 NOCOMMON 0 0 1482700200007 DATA 2 1 1482700200008 DATA ERR-T 1482700200009 MB MB 1482700200010 149.0 10.0 1482700200011 ENDDATA 3 0 1482700200012 ENDSUBENT 11 0 1482700299999 ENDENTRY 2 0 1482799999999