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