ENTRY 10947 810720 1094700000001 SUBENT 10947001 810720 1094700100001 BIB 14 48 1094700100002 INSTITUTE (1USAMHG) 1094700100003 REFERENCE (C,79KNOX,,976,7910) 1094700100004 AUTHOR (D.J.GRADY,G.T.BALDWIN,G.F.KNOLL) 1094700100005 TITLE ABSOLUTE FAST FISSION CROSS SECTION MEASUREMENTS ON 1094700100006 NP-237 1094700100007 FACILITY (REAC) UNIVERSITY OF MICHIGAN FORD NUCLEAR REACTOR 1094700100008 N-SOURCE (PHOTO) PHOTONEUTRON SOURCES ACTIVATED BY REACTOR 1094700100009 THERMAL NEUTRONS. LA-BE FOR 770-KEV NEUTRONS, NA-BE 1094700100010 FOR 964-KEV NEUTRONS. 1094700100011 SAMPLE TWO PLATINUM FOILS WITH 1-MILLIGRAM/SQ-CM DEPOSIT OF 1094700100012 NPO(2). DEPOSIT RADIUS WAS 1.375-CM. 1094700100013 DETECTOR (TRD) POLYESTER TRACK ETCH DETECTOR 1094700100014 MONITOR REFERENCE CF-252 SPONTANEOUS FISSION SOURCE USED TO 1094700100015 DETERMINE ABSOLUTE PHOTONEUTRON SOURCE STRENGTH. 1094700100016 METHOD (MANGB) MANGANESE BATH USED TO DETERMINE ABSOLUTE 1094700100017 PHOTONEUTRON SOURCE STRENGTH. 1094700100018 TWO SAMPLE FOILS POSITIONED IN DUAL COMPENSATED BEAM 1094700100019 GEOMETRY. TWO RUNS WITH 10 AND 14-CM SPACING BETWEEN 1094700100020 FOILS AVERAGED TO OBTAIN CROSS SECTION. FISSION 1094700100021 TARGETS, DETECTORS, AND NEUTRON SOURCES PLACED IN 1094700100022 EVACUATED CONTAINMENT PACKAGE WHICH WAS SUSPENDED IN 1094700100023 THE CENTER OF A SHIELDED LOW ALBEDO ROOM. COMPUTER 1094700100024 CODE USED TO CALCULATE SCALAR NEUTRON FLUX AND 1094700100025 APERTURE DETECTION EFFICIENCY. 1094700100026 CORRECTION THREE MAJOR CORRECTIONS MADE- 1094700100027 -MANGANESE BATH CORRECTED FOR- 1094700100028 -SOURCE AND DRY WELL SELF-ABSORPTION 1094700100029 -LEAKAGE OF NEUTRONS FROM BATH 1094700100030 -NEUTRON STREAMING LOSSES FROM DRY WELL OPENING 1094700100031 -PHOTO-ACTIVATION OF NATURAL DEUTERIUM CONTENT OF 1094700100032 BATH 1094700100033 -PARASITIC FAST NEUTRON CAPTURE BY O-16,AND S-32 1094700100034 CORRECTIONS WERE -0.333 PERCENT (770-KEV) AND 1094700100035 -0.555 PERCENT (964-KEV) 1094700100036 -NEUTRON INSCATTERING FROM EXPERIMENTAL APPARATUS, 1094700100037 DEPENDENT UPON FOIL SPACING 1094700100038 -10-CM SPACING +4.100 PERCENT (770 KEV) AND 1094700100039 +3.250 PERCENT (964 KEV) 1094700100040 -14-CM SPACING +5.390 PERCENT (770 KEV) AND 1094700100041 +4.380 PERCENT (964 KEV) 1094700100042 -CORRECTION FOR FINITE NEUTRON ENERGY DISTRIBUTION OF 1094700100043 SOURCES, +17.350 PERCENT (770 KEV) AND +6.860 1094700100044 PERCENT (964 KEV). 1094700100045 STATUS (PRELM) 1094700100046 (APRVD) APPROVED BY D.J.GRADY, 81/6/18. 1094700100047 ERR-ANALYS NO INFORMATION 1094700100048 HISTORY (810210C) 1094700100049 (810720A) STATUS ADDED. 1094700100050 ENDBIB 48 0 1094700100051 NOCOMMON 0 0 1094700100052 ENDSUBENT 51 0 1094700199999 SUBENT 10947002 810225 1094700200001 BIB 1 1 1094700200002 REACTION (93-NP-237(N,F),,SIG) 1094700200003 ENDBIB 1 0 1094700200004 NOCOMMON 0 0 1094700200005 DATA 2 2 1094700200006 EN DATA 1094700200007 KEV B 1094700200008 770. 1.191 1094700200009 964. 1.365 1094700200010 ENDDATA 4 0 1094700200011 ENDSUBENT 10 0 1094700299999 ENDENTRY 2 0 1094799999999