ENTRY 20506 19840126 00002050600000001 SUBENT 20506001 19840126 00002050600100001 BIB 11 60 2050600100002 INSTITUTE (2FR BRC) 2050600100003 REFERENCE (W,FREHAUT,8009) PRIVATE COMMUNICATION OF FREHAUT. 2050600100004 MAIN REFERENCE SUPERSEDING ALL DATA FROM PREVIOUS 2050600100005 PUBLICATIONS, LISTED BELOW 2050600100006 (C,73KIEV,3,153,7305) NATIONAL SOVIET CONF. ON NEUTRON 2050600100007 PHYSICS, KIEV,28/5-1/6(1973). 2050600100008 THIS REFERENCE IS KEPT AS MAIN REFERENCE FOR THE 2050600100009 DESCRIPTION OF THE EXPERIMENT. 2050600100010 THE PAPER GIVES NU-BAR DATA FOR U-235,PU-240 AND 2050600100011 PU-240/U-235 FISSION RATIO. 2050600100012 ONLY DATA FOR U-235, HOWEVER, ARE REPORTED HERE. 2050600100013 FOR PU-240 AND FOR FISSION RATIO SEE 2050600100014 (R,CEA-R-4626,7411) 2050600100015 WITH MORE UP-TO-DATE RESULTS. 2050600100016 THE REFERENCE ABOVE (73KIEV,3,153) SUPERSEDES THE 2050600100017 RESULTS PUBLISHED IN 2050600100018 (J,JNE,23,257,6905) 2050600100019 AND MAY BE CONSIDERED EQUIVALENT TO 2050600100020 (R,EANDC-154,67,7303) 2050600100021 ASSOCIATED REFERENCES ARE 2050600100022 (P,EANDC(E)-89,6802)WITH PRELIMINARY RESULTS 2050600100023 (P,EANDC(E)-115,6903) PROGR.REP. ANNOUNCING NEW 2050600100024 MEASUREMENTS 2050600100025 (C,69VIENNA,,931,6907) PROGR. REP. 2050600100026 (P,EANDC(E)-150,7202) PROGR. REP. 2050600100027 AUTHOR (J.FREHAUT, M.SOLEILHAC, G.MOSINSKI) 2050600100028 TITLE -MEASUREMENT OF THE AVERAGE NUMBER OF PROMPT NEUTRONS 2050600100029 EMITTED IN THE FISSION OF PU-240 AND U-235 INDUCED BY 2050600100030 NEUTRONS OF ENERGY BETWEEN 1.5 TO 15 MEV.- (IN FRENCH)2050600100031 FACILITY (VDGT ) 12 MEV TANDEM VAN DE GRAAFF 2050600100032 INC-SOURCE (P-T ) T(P,N)HE3 FOR NEUTRONS FROM 1.5 TO 7 MEV, 2050600100033 (D-D ) D(D,N)HE3 FOR NEUTRONS FROM 7 TO 15 MEV. 2050600100034 METHOD (TOF ) TIME OF FLIGHT TO SEPARATE FISSION EVENTS 2050600100035 INDUCED BY MONOENERGETIC INCIDENT NEUTRONS FROM 2050600100036 SPONTANEOUS AND SPURIOUS FISSION EVENTS. 2050600100037 DETECTOR (SCIN ) 80 CM DIAMETER GADOLINIUM-LOADED LIQUID 2050600100038 SCINTILLATOR. FISSION CHAMBER WAS PLACED AT CENTRE. 2050600100039 .COUNTING OF FISSION NEUTRONS, AFTER THERMALIZATION AND2050600100040 CAPTURE, DURING 50 MICRO-SEC FOLLOWING FISSION EVENT. 2050600100041 .BACKGROUND COUNTING WITH FISSION NEUTRONS, 200 MICRO- 2050600100042 SEC AFTER EACH FISSION EVENT. 2050600100043 STATUS .DATA FROM PRIVATE COMMUNICATION OF FREHAUT. 2050600100044 HISTORY (730830C) 2050600100045 (760315E) 2050600100046 (801015A) G.C. DATA UPDATED WITH FREHAUT'S PRIVATE 2050600100047 COMMUNICATION. 2050600100048 (801104E) 2050600100049 CORRECTION .THE AUTHORS HAVE NOTICED THAT THE BACKGROUND WAS 2050600100050 ALWAYS HIGHER FOR EVENTS WITHIN THE T-OF-F PEAK 2050600100051 THAN FOR THE REST OF THE T-OF-F SPECTRUM AND IT WAS 2050600100052 RECOGNIZED ESSENTIAL TO CONSIDER THE BACKGROUND 2050600100053 ASSOCIATED WITH THE PART OF THE T-OF-F BEING 2050600100054 ANALYSED. 2050600100055 .A CORRECTION FOR THIS VARIABLE BACKGROUND WAS APPLIED 2050600100056 WHICH RESULTED IN AN INCREASE OF THE NU VALUES GIVEN 2050600100057 IN JNE,23,257. 2050600100058 .IN A THIRD MEASUREMENT TO CHECK THIS CORRECTION. THESE2050600100059 RESULTS WERE NOT CONFIRMED. THEREFORE THE DATA ARE 2050600100060 CORRECTED AGAIN IN THE PRIVATE COMMUNICATION OF 2050600100061 FREHAUT. 2050600100062 ENDBIB 60 0 2050600100063 NOCOMMON 0 0 2050600100064 ENDSUBENT 63 0 2050600199999 SUBENT 20506002 19840126 00002050600200001 BIB 6 11 2050600200002 REACTION (92-U-235(N,F),PR,NU) PROMPT NU-BAR. 2050600200003 SAMPLE .FAST FISSION CHAMBER CONTAINING 50 MG OF U-235, 2050600200004 ENRICHMENT 99.89 PERCENT. 2050600200005 MONITOR (98-CF-252(0,F),PR,NU) 2050600200006 STATUS .DATA FROM PRIVATE COMMUNICATION OF FREHAUT. 2050600200007 HISTORY (730830C) 2050600200008 (760315E) 2050600200009 (801015A) G.C. UPDATED WITH DATA FROM PRIVATE 2050600200010 COMMUNICATION OF FREHAUT. 2050600200011 (801104E) 2050600200012 ERR-ANALYS (ERR-S) ERROR GIVEN IS STATISTICAL. 2050600200013 ENDBIB 11 0 2050600200014 COMMON 1 3 2050600200015 MONIT 2050600200016 NO-DIM 2050600200017 3.7820E+00 2050600200018 ENDCOMMON 3 0 2050600200019 DATA 4 34 2050600200020 EN EN-RSL DATA ERR-S 2050600200021 MEV MEV NO-DIM NO-DIM 2050600200022 1.3600E+00 1.6500E-01 2.5250E+00 1.7000E-02 2050600200023 1.3700E+00 1.5000E-01 2.5900E+00 2.2000E-02 2050600200024 2.3300E+00 1.0000E-01 2.6310E+00 2.6000E-02 2050600200025 2.4500E+00 1.2500E-01 2.6460E+00 2.2000E-02 2050600200026 2.9800E+00 1.0500E-01 2.7150E+00 1.8000E-02 2050600200027 3.5000E+00 1.0000E-01 2.7610E+00 2.3000E-02 2050600200028 3.9300E+00 7.5000E-02 2.8390E+00 2.6000E-02 2050600200029 4.0300E+00 9.0000E-02 2.8470E+00 1.9000E-02 2050600200030 4.4300E+00 9.0000E-02 2.9330E+00 2.8000E-02 2050600200031 4.5400E+00 8.0000E-02 2.9390E+00 2.2000E-02 2050600200032 4.9400E+00 8.5000E-02 3.0180E+00 2.8000E-02 2050600200033 5.0600E+00 7.0000E-02 2.9950E+00 1.9000E-02 2050600200034 5.5700E+00 7.0000E-02 3.1170E+00 2.8000E-02 2050600200035 5.9800E+00 7.5000E-02 3.2520E+00 3.8000E-02 2050600200036 6.0800E+00 6.5000E-02 3.2070E+00 2.9000E-02 2050600200037 6.9700E+00 1.7000E-01 3.3740E+00 2.2000E-02 2050600200038 7.0900E+00 6.5000E-02 3.3800E+00 2.9000E-02 2050600200039 7.4800E+00 1.6500E-01 3.4720E+00 1.6000E-02 2050600200040 7.9900E+00 1.4500E-01 3.5330E+00 1.7000E-02 2050600200041 8.4900E+00 1.3000E-01 3.6080E+00 1.8000E-02 2050600200042 9.0000E+00 1.2000E-01 3.6810E+00 1.8000E-02 2050600200043 9.4900E+00 1.1000E-01 3.7590E+00 2.0000E-02 2050600200044 9.7400E+00 1.1000E-01 3.8000E+00 2.1000E-02 2050600200045 9.9800E+00 1.0000E-01 3.8310E+00 1.4000E-02 2050600200046 1.0470E+01 9.5000E-02 3.8860E+00 2.0000E-02 2050600200047 1.0960E+01 9.0000E-02 3.9210E+00 1.9000E-02 2050600200048 1.1440E+01 8.5000E-02 4.0220E+00 2.0000E-02 2050600200049 1.1930E+01 8.0000E-02 4.0840E+00 2.1000E-02 2050600200050 1.2410E+01 8.0000E-02 4.1500E+00 2.0000E-02 2050600200051 1.2880E+01 8.0000E-02 4.2040E+00 2.4000E-02 2050600200052 1.3360E+01 7.5000E-02 4.2920E+00 2.2000E-02 2050600200053 1.3840E+01 7.5000E-02 4.3580E+00 2.2000E-02 2050600200054 1.4310E+01 7.0000E-02 4.4280E+00 2.2000E-02 2050600200055 1.4790E+01 7.0000E-02 4.4540E+00 2.3000E-02 2050600200056 ENDDATA 36 0 2050600200057 ENDSUBENT 56 0 2050600299999 ENDENTRY 2 0 2050699999999