ENTRY 20701 19840416 00002070100000001 SUBENT 20701001 19840416 00002070100100001 BIB 16 49 2070100100002 INSTITUTE (2JPNKTO) 2070100100003 (1USARPI) R.C.BLOCK. 2070100100004 REFERENCE (J,NSE,65,(2),347,7802) 2070100100005 ((P,NEANDC(J)-42L,28,7509)=(P,INDC(JAP)-28L,28,7509)) 2070100100006 PRELIMINARY DESCRIPTION. 2070100100007 AUTHOR (K.KOBAYASHI,Y.FUJITA,T.OOSAKI,R.C.BLOCK) 2070100100008 TITLE -NEUTRON TOTAL CROSS SECTION MEASUREMENT OF THORIUM 2070100100009 AVERAGED NEAR 24 KEV WITH AN FE-FILTERED BEAM- 2070100100010 FACILITY (LINAC) 46 MEV ELECTRON LINAC OF THE RESEARCH 2070100100011 REACTOR INSTITUTE FROM KYOTO UNIVERSITY. 2070100100012 INC-SOURCE (PHOTO) WATER COOLED PHOTONEUTRON TARGET MADE OF 2070100100013 TANTALUM PLATES WITH A 5 CM THICK POLYETHYLENE 2070100100014 MODERATOR. 2070100100015 .A PURE IRON FILTER OF 30 CM THICKNESS WAS USED FOR 2070100100016 FILTERING THE NEUTRON BEAM. 2070100100017 INC-SPECT .IRON FILTERED NEUTRON SPECTRUM PEAKED AT 24.3 KEV 2070100100018 WITH AN ENERGY WIDTH OF ABOUT 2 KEV. 2070100100019 SAMPLE .SIX THORIUM METALIC PLATES OF DIFFERENT THICKNES 2070100100020 WERE USED RANGING FROM 0.0273 TO 0.1551 ATOMS/BARN. 2070100100021 METHOD (TOF ) 22.2 M FLIGHT PATH. 2070100100022 .IRON FILTERED BEAM. 2070100100023 .TRANSMISSION MEASUREMENT. 2070100100024 DETECTOR (NAICR) FOR NEUTRON DETECTION A BARE 12.7 CM 2070100100025 DIAM. BY 5.08 CM THICK NAI(TL) CRYSTAL WAS USED. 2070100100026 (GLASD) A LI-6 GLASS SCINTILLATOR WAS USED FOR 2070100100027 DETERMINING INTERFERENCE EFFECTS IN RESONANCE CROSS 2070100100028 SECTIONS BETWEEN IODINE IN DETECTOR AND THORIUM 2070100100029 SAMPLE. 2070100100030 (PROPC) A BF3 PROPORTIONAL COUNTER WAS USED FOR 2070100100031 MONITORING THE NEUTRON INTENSITY. 2070100100032 ANALYSIS .CROSS SECTION OBTAINED BY EXTRAPOLATIONS OF 2070100100033 TRANSMISSION FACTOR TO ZERO SAMPLE THICKNESS. 2070100100034 COMMENT .CROSS SECTION MEASURED WITH GREAT ACCURACITY. 2070100100035 .CALCULATIONS OF POTENTIAL AND RESONANCE CROSS 2070100100036 SECTIONS WERE MADE WITH DATA TAKEN FROM LITERATURE, 2070100100037 SEE DETAILS IN REFERENCE. 2070100100038 .RECOMENDED AVERAGE PARAMETERS ARE GIVEN. 2070100100039 STATUS .DATA TAKEN FROM TABLE 3 OF REFERENCE. 2070100100040 HISTORY (760922C) 2070100100041 (771109E) 2070100100042 (840106U) A.P.T. JAPAN CODE CHANGED TO JPN 2070100100043 (840106E) 2070100100044 CORRECTION .BACKGROUND,DEAD TIME CORRECTIONS IN TIME ANALYZER. 2070100100045 .AIR SCATTERING CORRECTIONS OF NEUTRONS IN THE 2070100100046 FLIGHT PATH. 2070100100047 ERR-ANALYS .EXPERIMENTAL ERROR IS MAINLY STATISTICAL,THE OTHER 2070100100048 ERRORS ARE SMALL ONES DUE TO WEIGHT AND THICKNESS 2070100100049 VARIATIONS IN SAMPLES AND THE METHOD OF DETERMINING 2070100100050 THE BACKGROUND. 2070100100051 ENDBIB 49 0 2070100100052 NOCOMMON 0 0 2070100100053 ENDSUBENT 52 0 2070100199999 SUBENT 20701002 19840127 00002070100200001 BIB 1 1 2070100200002 REACTION (90-TH-232(N,TOT),,SIG) 2070100200003 ENDBIB 1 0 2070100200004 NOCOMMON 0 0 2070100200005 DATA 4 1 2070100200006 EN EN-RSL DATA DATA-ERR 2070100200007 KEV KEV B B 2070100200008 2.4000E+01 2.0000E+00 1.4933E+01 4.1000E-02 2070100200009 ENDDATA 3 0 2070100200010 ENDSUBENT 9 0 2070100299999 ENDENTRY 2 0 2070199999999