ENTRY 20593 840409 2059300000001 SUBENT 20593001 840409 2059300100001 BIB 17 43 2059300100002 INSTITUTE (2JPNKTO) 2059300100003 REFERENCE (J,NST,10,(9),574,7309) NUMERICAL VALUES AND 2059300100004 COMPARISONS. 2059300100005 AUTHOR (I.KIMURA,K.KOBAYASHI,T.SHIBATA) 2059300100006 TITLE -MEASUREMENT OF AVERAGE CROSS SECTIONS FOR SOME 2059300100007 THRESHOLD REACTIONS BY MEANS OF A SMALL FISSION 2059300100008 FOIL IN LARGE THERMAL NEUTRON FIELD- 2059300100009 FACILITY .KYOTO UNIVERSITY REACTOR (KUR). 2059300100010 INC-SOURCE .FISSION NEUTRONS INDUCED IN U-235 FOIL INSIDE 2059300100011 THERMAL COLUMN OF THE KUR REACTOR. 2059300100012 .FISSION FOIL 0.5 MM THICKNESS,1 CM DIAMETER 2059300100013 COMPOSSED OF A 90 P.C. ENRICHED U-AL ALLOY. 2059300100014 INC-SPECT .U-235 FISSION SPECTRUM. 2059300100015 SAMPLE .THRESHOLD FOILS SURROUNDING FISSION FOIL,NO 2059300100016 DETAILS GIVEN. 2059300100017 METHOD (ACTIV) ACTIVATION,,WITH SIMULTANEOUS MEASUREMENT 2059300100018 OF FISSION NEUTRON NUMBER BY DETECTION OF THE 2059300100019 1.596 MEV GAMMA-RAY FROM LA-140 PRODUCED BY DECAY 2059300100020 OF THE FISSION PRODUCT BA-140. 2059300100021 DETECTOR (GELI ) GE-LI DETECTOR WHOSE DETECTION 2059300100022 EFFICIENCY HAD PREVIOUSLY BEEN CALIBRATED. 2059300100023 ANALYSIS .SHAPE FACTOR FOR NEUTRON ABSORPTION IN THRESHOLD 2059300100024 FOIL CALCULATED BY TWO METHODS,ANALYTICAL FORMULA 2059300100025 ,FORMULAE (4)-(8) OF J.NUCL.SCI.TECHN.10,574(1973), 2059300100026 AND MONTE CARLO METHOD. 2059300100027 MONITOR .ABSOLUTE. 2059300100028 COMMENT .RESULTS LOWER THAN THOSE PROPOSED BY MC ELROY,ET AL. 2059300100029 NUCL.SCI.ENG.48,51(1972). 2059300100030 STATUS .DATA TAKEN FROM TABLE 2 OF J.NUCL.SCI.TECHN.10,574, 2059300100031 (1973). 2059300100032 HISTORY (760802C) 2059300100033 (761217E) 2059300100034 (840106U) A.P.T. JAPAN CODE CHANGED TO JPN 2059300100035 (840106E) 2059300100036 CORRECTION .BACKGROUND 2059300100037 .SCATTERING AND ABSORPTION,OTHER THAN REACTION IN 2059300100038 QUESTION, IN THRESHOLD FOILS NEGLECTED,CONTRIBUTION 2059300100039 ESTIMATED LESS THAN 1. PER-CENT. 2059300100040 .SCATTERING,ABSORPTION,AND SECONDARY FISSIONS IN 2059300100041 U-AL FOIL NEGLECTED,CONTRIBUTION ESTIMATED AS LESS 2059300100042 THAN 0.4 PER-CENT 2059300100043 ERR-ANALYS .STATISTICAL ERRORS,UNCERTAINTY IN DETECTOR 2059300100044 EFFICIENCY AND SAMPLE POSITION ACCOUNTED. 2059300100045 ENDBIB 43 0 2059300100046 NOCOMMON 0 0 2059300100047 ENDSUBENT 46 0 2059300199999 SUBENT 20593002 840126 2059300200001 BIB 3 7 2059300200002 REACTION (13-AL-27(N,A)11-NA-24,,SIG,,FIS) 2059300200003 FISSION SPECTRUM AVERAGE CROSS 2059300200004 SECTION 2059300200005 FLAG (1.) SHAPE FACTOR CALCULATED ANALYTICALY. 2059300200006 (2.) SHAPE FACTOR CALCULATED BY MONTE CARLO. 2059300200007 HISTORY (760802C) 2059300200008 (761217E) 2059300200009 ENDBIB 7 0 2059300200010 NOCOMMON 0 0 2059300200011 DATA 4 2 2059300200012 EN-DUMMY DATA DATA-ERR FLAG 2059300200013 MEV MB MB NO-DIM 2059300200014 1.5000E+00 6.3500E-01 3.6000E-02 1.0000E+00 2059300200015 1.5000E+00 6.5300E-01 3.6000E-02 2.0000E+00 2059300200016 ENDDATA 4 0 2059300200017 ENDSUBENT 16 0 2059300299999 SUBENT 20593003 840126 2059300300001 BIB 3 7 2059300300002 REACTION (28-NI-58(N,P)27-CO-58,,SIG,,FIS) 2059300300003 FISSION SPECTRUM AVERAGE 2059300300004 CROSS SECTION. 2059300300005 FLAG (1.) SHAPE FACTOR CALCULATED ANALYTICALY. 2059300300006 (2.) SHAPE FACTOR CALCULATED BY MONTE CARLO. 2059300300007 HISTORY (760802C) 2059300300008 (761217E) 2059300300009 ENDBIB 7 0 2059300300010 NOCOMMON 0 0 2059300300011 DATA 4 2 2059300300012 EN-DUMMY DATA DATA-ERR FLAG 2059300300013 MEV MB MB NO-DIM 2059300300014 1.5000E+00 1.0260E+02 5.2000E+00 1.0000E+00 2059300300015 1.5000E+00 1.0160E+02 5.6000E+00 2.0000E+00 2059300300016 ENDDATA 4 0 2059300300017 ENDSUBENT 16 0 2059300399999 SUBENT 20593004 840126 2059300400001 BIB 4 9 2059300400002 REACTION (49-IN-115-M1(N,INL)49-IN-115-M,,SIG,,FIS) 2059300400003 FISSION SPECTRUM AVERAGE 2059300400004 INELASTIC CROSS SECTION LEAVING RESIDUAL NUCLEUS IN 2059300400005 METASTABLE STATE. 2059300400006 HALF-LIFE (HL,49-IN-115-M2) FROM CHART OF THE NUCLIDES. 2059300400007 FLAG (1.) SHAPE FACTOR CALCULATED ANALYTICALY. 2059300400008 (2.) SHAPE FACTOR CALCULATED BY MONTE CARLO. 2059300400009 HISTORY (760802C) 2059300400010 (761217E) 2059300400011 ENDBIB 9 0 2059300400012 COMMON 1 3 2059300400013 HL 2059300400014 HR 2059300400015 4.5000E+00 2059300400016 ENDCOMMON 3 0 2059300400017 DATA 4 2 2059300400018 EN-DUMMY DATA DATA-ERR FLAG 2059300400019 MEV MB MB NO-DIM 2059300400020 1.5000E+00 1.7650E+02 8.8000E+00 1.0000E+00 2059300400021 1.5000E+00 1.7740E+02 9.8000E+00 2.0000E+00 2059300400022 ENDDATA 4 0 2059300400023 ENDSUBENT 22 0 2059300499999 ENDENTRY 4 0 2059399999999