ENTRY 20436 19840118 00002043600000001 SUBENT 20436001 19840118 00002043600100001 BIB 14 39 2043600100002 INSTITUTE (2SWTWUR) INST. FUER REACTORFORSCHUNG, WUERENLINGEN, 2043600100003 SWITZERLAND 2043600100004 REFERENCE (R,EIR-195,7103) 2043600100005 AUTHOR (F.HEGEDUES) 2043600100006 TITLE FAST NEUTRON FLUENCE DETECTOR USING THE REACTION 2043600100007 NB-93(N,N )NB-93(METASTABLE) IN FRENCH 2043600100008 FACILITY REACTOR SAPHIR 2043600100009 INC-SPECT CROSS-SECTIONS IN THE ENERGY INTERVALS(MEV) 0.1-0.25 2043600100010 0.25-0.5, .5-.75, .75-1.0, 1.0-1.25, 1.25-1.5, 2043600100011 1.5-2.0, 2.0-2.5, 2.5-3.0, 3.0-3.5, 3.5-4.0, 4-5, 2043600100012 5-6, 6-7, 7-8, 8-9, 9-10, 10-11, 11-12, 12-13, 2043600100013 13-15, CALCULATED. 2043600100014 METHOD (ACTIV) ACTIVATION. 2043600100015 DETECTOR GE(LI), SI(LI) 2043600100016 MONITOR COMPARING TOTAL ACTIVATIONS OF NB-93(N,N )(METAST.) 2043600100017 AND RH-103(N,N )(METAST.) MEASURED AT DIFFERENT 2043600100018 POSITION IN THE REACTOR SAPHIR SHOWED THAT THE 2043600100019 ACTIVATIONS OF BOTH ELEMENTS ARE PROPORTIONAL(SEE 2043600100020 FIG.II.6 AND FIG.II.7 IN PUBLICATION) AND THE 2043600100021 RELATION- 2043600100022 NB-93-(N,N )(METAST.)=R*RH-103(N,N )(METASTABLE), 2043600100023 WHERE R IS A CONSTANT FACTOR, CAN BE USED TO 2043600100024 CALCULATE THE NB-93(N,N )(METAST.) CROSS-SECTIONS. 2043600100025 R=0.163+-0.014 AND THE RH-103(N,N )(METAST.) CROSS- 2043600100026 SECTION BY J.P.BUTLER AND D.C.SANTRY, PROC. WASH. 2043600100027 CONF. ON NEUTRON CROSS-SECTION AND TECHNOLOGY, 2043600100028 VOL.2, 803(1968) MULTIPLIED BY 0.852 (THE RATIO OF 2043600100029 CONVERSION COEFFICIENTS ALPHA(K)/ALPHA OF RH-103(M) 2043600100030 TAKEN BY THESE AUTHORS WAS TOO LOW, = 0.099 INSTEAD 2043600100031 OF 0.131) WERE USED. 2043600100032 PART-DET (G) 16.6 KEV X(K-ALPHA)-RAYS 2043600100033 COMMENT PARTIAL (779.7 AND 656 KEV) GAMMA TRANSITION CROSS- 2043600100034 SECTION INCOMPLETE (SEE INDC(NDS)-47/L (1972) BY 2043600100035 M.F.VLASOV ET AL.), NO DIFFERENTIAL CROSS-SECTIONS 2043600100036 OF THE 30 KEV ISOMERIC STATE AVAILABLE. 2043600100037 STATUS DATA TAKEN FROM TABLE II-6,PAG.35 OF THE PUBLICATION. 2043600100038 HISTORY (731130C) 2043600100039 (751126E) 2043600100040 ERR-ANALYS SYSTEMATIC ERROR ESTIMATED TO BE +- 30 PERC. 2043600100041 ENDBIB 39 0 2043600100042 NOCOMMON 0 0 2043600100043 ENDSUBENT 42 0 2043600199999 SUBENT 20436002 19840118 00002043600200001 BIB 2 3 2043600200002 REACTION (41-NB-93(N,INL)41-NB-93-M,,SIG) 2043600200003 HISTORY (731130C) 2043600200004 (751126E) 2043600200005 ENDBIB 3 0 2043600200006 NOCOMMON 0 0 2043600200007 DATA 3 21 2043600200008 EN EN-RSL DATA 2043600200009 MEV MEV B 2043600200010 1.7500E-01 7.5000E-02 3.8000E-03 2043600200011 3.7500E-01 1.2500E-01 1.5500E-02 2043600200012 6.2500E-01 1.2500E-01 3.8500E-02 2043600200013 8.7500E-01 1.2500E-01 7.8500E-02 2043600200014 1.1250E+00 1.2500E-01 8.6700E-02 2043600200015 1.3750E+00 1.2500E-01 9.4800E-02 2043600200016 1.7500E+00 2.5000E-01 1.0870E-01 2043600200017 2.2500E+00 2.5000E-01 1.2280E-01 2043600200018 2.7500E+00 2.5000E-01 1.3230E-01 2043600200019 3.2500E+00 2.5000E-01 1.3900E-01 2043600200020 3.7500E+00 2.5000E-01 1.4380E-01 2043600200021 4.5000E+00 5.0000E-01 1.5240E-01 2043600200022 5.5000E+00 5.0000E-01 1.6850E-01 2043600200023 6.5000E+00 5.0000E-01 1.8230E-01 2043600200024 7.5000E+00 5.0000E-01 1.8560E-01 2043600200025 8.5000E+00 5.0000E-01 1.8560E-01 2043600200026 9.5000E+00 5.0000E-01 1.8260E-01 2043600200027 1.0500E+01 5.0000E-01 1.5650E-01 2043600200028 1.1500E+01 5.0000E-01 1.1750E-01 2043600200029 1.2500E+01 5.0000E-01 7.8300E-02 2043600200030 1.4000E+01 1.0000E+00 4.7500E-02 2043600200031 ENDDATA 23 0 2043600200032 ENDSUBENT 31 0 2043600299999 ENDENTRY 2 0 2043699999999