ENTRY            20592   19840409                             00002059200000001 
SUBENT        20592001   19840409                             00002059200100001 
BIB                 15         49                                 2059200100002 
INSTITUTE  (2JPNKTO)                                              2059200100003 
REFERENCE  (J,NST,8,(9),492,7109) NUMERICAL VALUES AND            2059200100004 
            COMPARISONS.                                          2059200100005 
AUTHOR     (K.KOBAYASHI,T.HASHIMOTO,I.KIMURA)                     2059200100006 
TITLE      -MEASUREMENTS OF AVERAGE CROSS SECTION FOR TH232(N,    2059200100007 
            2N)TH231 REACTION TO NEUTRONS WITH FISSION-TYPE       2059200100008 
            REACTOR SPECTRUM AND OF GAMMA-RAY INTENSITIES OF      2059200100009 
            TH231-                                                2059200100010 
FACILITY   .KYOTO UNIVERSITY REACTOR (KUR).                       2059200100011 
INC-SOURCE (REAC )    IRRADIATION IN KUR CORE.                    2059200100012 
INC-SPECT  .VERY CLOSE TO FISSION SPECTRUM ABOVE 1 MEV.           2059200100013 
SAMPLE     .AT IRRADIATION 0.5 G OF THORIUM NITRATE.              2059200100014 
           .AT DETECTION,AFTER CHEMICAL SEPARATION (SEE DETAILS   2059200100015 
            IN P.493 OF MAIN REFERENCE),FOUR SEPARATED FOILS      2059200100016 
            0.8 CM**2 OF SURFACE.                                 2059200100017 
METHOD     (ACTIV)    ACTIVATION.                                 2059200100018 
           .MEASUREMENT OF THE ABSOLUTE AMOUNT OF TH231 MADE      2059200100019 
            BY COMPARISON WITH AN ENRICHED REFERENCE U-235        2059200100020 
            FOIL,DETAILS IN P.494 OF J.NUCL.SCI.TECHN.,8,492,     2059200100021 
            (1971).                                               2059200100022 
           .DETERMINATION OF THE ABSOLUTE AMOUNT OF TH232         2059200100023 
            WERE MADE AFTER IRRADIATION IN THERMAL COLUMN,        2059200100024 
                DETECTION OF GAMMA ACTIVITIES OF PA-233 AND       2059200100025 
            COMPARISON WITH KNOWN WEIGHT TH SAMPLES.              2059200100026 
           .INDUCED ACTIVITY IN NI-58,MG-24 AND AL-27 THRESHOLD   2059200100027 
            FOILS WAS MEASURED FOR MONITORING THE NEUTRON FLUX.   2059200100028 
DETECTOR   (GELI )    GE-LI DETECTOR OF PREVIOUSLY CALIBRATED     2059200100029 
            EFFICIENCY.                                           2059200100030 
MONITOR    (28-NI-58(N,P)27-CO-58,,SIG)                           2059200100031 
           (12-MG-24(N,P)11-NA-24,,SIG)                           2059200100032 
           (13-AL-27(N,A)11-NA-24,,SIG)                           2059200100033 
             THRESHOLD FOILS OF NI,MG AND AL FOR                  2059200100034 
            MONITORING THE NEUTRON FLUX.                          2059200100035 
           .GE-LI DETECTOR CALIBRATED WITH STANDARD GAMMA         2059200100036 
            SOURCES.                                              2059200100037 
COMMENT    .RESULT  AGREES SATISFACTORILY WITH PHILIPS,J.NUCL.    2059200100038 
            ENERG.7,215 (1958) BUT IS IN POOR AGREEMENT WITH      2059200100039 
            OTHER AUTHORS.                                        2059200100040 
STATUS     .NUMERICAL DATA TAKEN FROM REFERENCE.                  2059200100041 
HISTORY    (760804C)                                              2059200100042 
           (761217E)                                              2059200100043 
           (840106U) A.P.T. JAPAN CODE CHANGED TO JPN             2059200100044 
           (840106E)                                              2059200100045 
ERR-ANALYS .FAST NEUTRON FLUX UNCERTAINTY ESTIMATED TO 3 P.C.     2059200100046 
           .ERROR IN QUANTITY OF TH-231 IN SAMPLES,3.7 P.C.       2059200100047 
           .STANDARD DEVIATION FROM THE FOUR THORIUM SAMPLES      2059200100048 
            ABOUT 5 P.C.                                          2059200100049 
           .ALL THESE ERRORS WERE ADDED QUADRATICALLY TO GIVE     2059200100050 
            A TOTAL ERROR OF 6.7 P.C.                             2059200100051 
ENDBIB              49          0                                 2059200100052 
NOCOMMON             0          0                                 2059200100053 
ENDSUBENT           52          0                                 2059200199999 
SUBENT        20592002   19840126                             00002059200200001 
BIB                  3          6                                 2059200200002 
REACTION   (90-TH-232(N,2N)90-TH-231,,SIG,,FIS)                   2059200200003 
            AVERAGE FISSION SPECTRUM CROSS                        2059200200004 
            SECTION                                               2059200200005 
HALF-LIFE  (HL,90-TH-231)  MEASURED BY AUTHORS.                   2059200200006 
HISTORY    (760804C)                                              2059200200007 
           (761217E)                                              2059200200008 
ENDBIB               6          0                                 2059200200009 
NOCOMMON             0          0                                 2059200200010 
DATA                 5          1                                 2059200200011 
EN-DUMMY   DATA       DATA-ERR   HL         HL-ERR                2059200200012 
MEV        MB         MB         HR         HR                    2059200200013 
 1.5000E+00 1.2500E+01 8.4000E-01 2.5700E+01 2.0000E-01           2059200200014 
ENDDATA              3          0                                 2059200200015 
ENDSUBENT           14          0                                 2059200299999 
ENDENTRY             2          0                                 2059299999999