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