ENTRY 40705 20110812 41534070500000001 SUBENT 40705001 20110812 41534070500100001 BIB 13 40 4070500100002 TITLE Measurement and analysis of the neutron emission 4070500100003 spectrum arising at the 14 MeV neutron bombardment 4070500100004 of niobium 4070500100005 AUTHOR (A.A.Lychagin,V.A.Vinogradov,O.T.Grudzevich,B.V.Devkin,4070500100006 G.V.Kotel'Nikova,V.I.Plyaskin,O.A.Sal'nikov) 4070500100007 INSTITUTE (4RUSFEI) 4070500100008 REFERENCE (R,FEI-1385,1983) Cross-section curves are given 4070500100009 REL-REF (M,,A.A.Lychagin+,R,FEI-923,26,1979) 4070500100010 Method of detector efficiency measurement. 4070500100011 Spectrometer details are in : 4070500100012 (I,,V.B.Anufrienko+,J,VAT/R,1977,(5/19),34,1977) 4070500100013 V.B.Anufrienko+, Universal spectrometer of fast 4070500100014 neutrons by time of flight, Voprosy Atomnoy Nauki i 4070500100015 Tekhniki,ser. Reactorostroenie,iss.(5/19),page 34,1977.4070500100016 METHOD (TOF) Flight bases are 2.4m and 7.m, resolution 1.3 4070500100017 and .65 nsec/m . 4070500100018 DETECTOR (STANK) Liquid scintillator NE-218 and photomultiplier 4070500100019 XP-2041 4070500100020 Neutron registration threshold 100 keV and 0.5 Mev for 4070500100021 2.4 m and 7 m, respectively. 4070500100022 Detector efficiency was defined by Cf-252 spectrum 4070500100023 measurement as described in REL-REF of A.A.Lychagin+. 4070500100024 (SCIN) Stilbene crystal of 30 mm diameter, 20mm 4070500100025 thickness, with FEU-30 -for neutron flux monitoring . 4070500100026 (LONGC) For neutron flux monitoring 4070500100027 INC-SOURCE (D-T) 4070500100028 FACILITY (ACCEL,4RUSFEI) 4070500100029 SAMPLE Cylindrical samples height 45 mm and diameters 45 4070500100030 and 35 mm 4070500100031 ANALYSIS Neutron spectrum analysis on the basis of the statis- 4070500100032 tical theory of nuclear reactions and Hauser-Feshbach 4070500100033 formalism. 4070500100034 HISTORY (19840411C) Compiled at the CJD 4070500100035 (19861211A) Secondary neutron spectrum data are trans- 4070500100036 ferred into ENTRY 40851 4070500100037 (20110812A) M.M. COREL was added. 4070500100038 Reference J,YK,1977,(5/19),34,1977 was deleted as wrong4070500100039 coded - right ref. is given in REL-REF as free text. 4070500100040 CORRECTION Corrections were made on multiple scattering and 4070500100041 neutron flux attenuation by Monte Carlo method. 4070500100042 ENDBIB 40 0 4070500100043 NOCOMMON 0 0 4070500100044 ENDSUBENT 43 0 4070500199999 SUBENT 40705002 20110812 41534070500200001 BIB 3 10 4070500200002 REACTION (41-NB-93(N,2N)41-NB-92,,SIG) 4070500200003 ANALYSIS (INTED) CS extracted from the second-neutrons spectrum,4070500200004 which was obtained by subtraction of calculated on the 4070500200005 base of theoretical models (parameters for analysis 4070500200006 were found by using exp. data) spectrum of first 4070500200007 neutrons from the measured neutron emission spectrum. 4070500200008 of other authors. 4070500200009 STATUS (TABLE) Text, pages 11, 13 of R,FEI-1385,1983. 4070500200010 (PRELM) Preliminary datum 4070500200011 (COREL,40851003) Different analysis. 4070500200012 ENDBIB 10 0 4070500200013 NOCOMMON 0 0 4070500200014 DATA 3 1 4070500200015 EN DATA DATA-ERR 4070500200016 MEV MB MB 4070500200017 14.3 1370. 110. 4070500200018 ENDDATA 3 0 4070500200019 ENDSUBENT 18 0 4070500299999 NOSUBENT 40705003 19861211 00004070500300001 ENDENTRY 3 0 4070599999999