ENTRY 20942 19810429 00002094200000001 SUBENT 20942001 19810429 00002094200100001 BIB 12 31 2094200100002 INSTITUTE (2UK NPL) 2094200100003 REFERENCE (J,JNE,27,519,7308) 2094200100004 (P,EANDC(UK)-151,7308) 2094200100005 AUTHOR (T.B.RYVES,J.B.HUNT,J.C.ROBERTSON) 2094200100006 TITLE -NEUTRON CAPTURE CROSS SECTION MEASUREMENTS FOR 2094200100007 U-238 AND IN-115 BETWEEN 150 AND 630 KEV-. 2094200100008 FACILITY (VDG ) VAN DER GRAAF ACCELERATOR. 2094200100009 INC-SOURCE (P-LI7) PROTON-LITHIUM-7, LI EVAPORATED ONTO A 1MM 2094200100010 THICK AG BACKING, AIR COOLED. PROTON ENERGY 2094200100011 CALIBRATED ABSOLUTELY TO 2 PERCENT. 2094200100012 INCIDENT NEUTRON ENERGY SPREAD OF 10-20 KEV FROM 2094200100013 TARGET THICKNESS. 2094200100014 METHOD (ACTIV) ACTIVATION. 2094200100015 DETECTOR (PROPC) 4PI BETA ARGON-METHANE GAS FLOW PROPORTIONAL 2094200100016 COUNTER WITH KNOWN BETA COUNTING EFFICIENCY. 2094200100017 (LONGC) CALIBRATED LONG COUNTER FOR NEUTRONS, 2094200100018 CALIBRATED WITH STANDARD SB-BE, RA-BE AND NA-BE 2094200100019 PHOTO-NEUTRON SOURCES TO BETTER THAN 1 PERCENT. 2094200100020 RESPONSE TO NEUTRONS BETWEEN 150 AND 630 KEV WAS 2094200100021 DETERMINED TO BE CONSTANT TO WITHIN 2 PERCENT BY 2094200100022 COMPARISON WITH VANADYL SULPHATE BATH DETECTOR 2094200100023 SYSTEM - JNE,26,507,1972. 2094200100024 PART-DET (B- ) DECAY BETAS. 2094200100025 STATUS .DATA FROM TABLE 1, JNE,27,519,1973. 2094200100026 HISTORY (790612C) 2094200100027 (790628E) 2094200100028 (810402A) ERR-ANALYS CHANGED. 2094200100029 (810429E) 2094200100030 CORRECTION .CORRECTED FOR ACTIVITY FROM BACKGROUND NEUTRONS, 2094200100031 POSITIONAL EFFECT FOR U/IN IN RATIO MEASUREMENT, 2094200100032 AIR SCATTER AND AIR ATTENUATION. 2094200100033 ENDBIB 31 0 2094200100034 NOCOMMON 0 0 2094200100035 ENDSUBENT 34 0 2094200199999 SUBENT 20942002 19861015 00002094200200001 BIB 7 23 2094200200002 REACTION (49-IN-115(N,G)49-IN-116-M1+M2,,SIG) 2094200200003 SAMPLE .INDIUM DISC SAMPLES, 4 CM**2 WEIGHING FROM 150 TO 2094200200004 370 MG. 2094200200005 DECAY-DATA (49-IN-116-M,54.12MIN,B-) 2094200200006 COMMENT .INDEPENDANT DATA TO THAT FROM THE U/IN RATIO 2094200200007 MEASUREMENT. 2094200200008 STATUS .TABLE 1. 2094200200009 HISTORY (790612C) 2094200200010 (790628E) 2094200200011 (810429E) 2094200200012 (860808A)HH REACTION STRING CORRECTED 2094200200013 (860807E) 2094200200014 ERR-ANALYS (ERR-S) STATISTICAL UNCERTAINTY, 2094200200015 (ERR-1) NEUTRON FLUX UNCERTAINTY, 2094200200016 (ERR-2) INDIUM SAMPLE EFFICIENCY UNCERTAINTY, 2094200200017 (ERR-3) TARGET SCATTERER UNCERTAINTY, 2094200200018 (ERR-4) UNCERTAINTY OF OTHER CORRECTIONS, 2094200200019 (ERR-T) TOTAL UNCERTAINTY. 2094200200020 .ALL UNCERTAINTIES HAVE BEEN RECALCULATED TO ONE 2094200200021 SIGMA (68 PERCENT CONFIDENCE LEVEL) BY THE 2094200200022 COMPILER AND THE TOTAL UNCERTAINTY IS GIVEN AS 2094200200023 THE QUADRATIC SUM OF THE STATISTICAL AND THE 2094200200024 SYSTEMATIC UNCERTAINTIES. 2094200200025 ENDBIB 23 0 2094200200026 COMMON 3 3 2094200200027 ERR-1 ERR-2 ERR-4 2094200200028 PER-CENT PER-CENT PER-CENT 2094200200029 8.0000E-01 2.0000E-01 2.0000E-01 2094200200030 ENDCOMMON 3 0 2094200200031 DATA 6 7 2094200200032 EN EN-RSL DATA ERR-3 ERR-S ERR-T 2094200200033 KEV KEV MB PER-CENT PER-CENT PER-CENT 2094200200034 1.5300E+02 1.4000E+01 2.3800E+02 7.0000E-01 5.0000E-01 1.2000E+002094200200035 1.5400E+02 1.4000E+01 2.3900E+02 7.0000E-01 3.0000E-01 1.1000E+002094200200036 1.9500E+02 1.1000E+01 2.1700E+02 7.0000E-01 3.0000E-01 1.1000E+002094200200037 2.3100E+02 1.7000E+01 1.7900E+02 7.0000E-01 3.0000E-01 1.1000E+002094200200038 3.3600E+02 1.5000E+01 1.4400E+02 7.0000E-01 8.0000E-01 1.4000E+002094200200039 5.4800E+02 1.4000E+01 1.5200E+02 4.0000E-01 3.0000E-01 1.0000E+002094200200040 6.2300E+02 1.4000E+01 1.5400E+02 4.0000E-01 3.0000E-01 1.0000E+002094200200041 ENDDATA 9 0 2094200200042 ENDSUBENT 41 0 2094200299999 SUBENT 20942003 19810429 00002094200300001 BIB 8 24 2094200300002 REACTION (92-U-238(N,G)92-U-239,,SIG) 2094200300003 SAMPLE .U2O3 POWDER ON PURE IRON FOILS, WEIGHT 20-150 MG. 2094200300004 DECAY-DATA (92-U-239,23.40MIN,B-) 2094200300005 MONITOR (49-IN-115(N,G)49-IN-116-M,,SIG) VALUES FROM 2094200300006 INDEPENDANT MEASUREMENT. 2094200300007 COMMENT .DERIVED FROM U/IN RATIO AND INDEPENDANT IN DATA. 2094200300008 STATUS .TABLE 1. 2094200300009 HISTORY (790612C) 2094200300010 (790628E) 2094200300011 (810402A) 2094200300012 (810429E) 2094200300013 ERR-ANALYS (ERR-S) STATISTICAL UNCERTAINTY, 2094200300014 (ERR-1) URANIUM SAMPLE EFFICIENCY UNCERTAINTY, 2094200300015 (ERR-2) BACKGROUND ACTIVITY UNCERTAINTY, 2094200300016 (ERR-3) NEUTRON FLUX AND MONITOR CROSS-SECTION 2094200300017 UNCERTAINTIES, 2094200300018 (ERR-4) TARGET SCATTERER UNCERTAINTY, 2094200300019 (ERR-5) UNCERTAINTIES OF OTHER CORRECTIONS, 2094200300020 (ERR-T) TOTAL UNCERTAINTY. 2094200300021 .ALL UNCERTAINTIES WERE RECALCULATED TO ONE 2094200300022 SIGMA (68 PERCENT CONFIDENCE LEVEL) BY THE 2094200300023 COMPILER, AND THE TOTAL UNCERTAINTY IS THE 2094200300024 QUADRATIC SUM OF THE SYSTEMATIC AND THE STATISTICAL 2094200300025 UNCERTAINTIES. 2094200300026 ENDBIB 24 0 2094200300027 COMMON 3 3 2094200300028 ERR-1 ERR-2 ERR-5 2094200300029 PER-CENT PER-CENT PER-CENT 2094200300030 4.0000E-01 1.0000E-01 2.0000E-01 2094200300031 ENDCOMMON 3 0 2094200300032 DATA 8 4 2094200300033 EN EN-RSL MONIT DATA ERR-S ERR-3 2094200300034 ERR-4 ERR-T 2094200300035 KEV KEV MB MB PER-CENT PER-CENT 2094200300036 PER-CENT PER-CENT 2094200300037 1.5700E+02 2.0000E+01 2.3800E+02 1.6200E+02 1.4000E+00 8.0000E-012094200300038 7.0000E-01 1.8000E+00 2094200300039 2.3100E+02 1.8000E+01 1.7900E+02 1.2800E+02 1.4000E+00 1.0000E+002094200300040 7.0000E-01 1.9000E+00 2094200300041 5.5900E+02 1.5000E+01 1.5200E+02 1.1100E+02 1.3000E+00 8.0000E-012094200300042 3.0000E-01 1.6000E+00 2094200300043 6.2400E+02 1.4000E+01 1.5400E+02 1.1900E+02 1.5000E+00 8.0000E-012094200300044 3.0000E-01 1.8000E+00 2094200300045 ENDDATA 12 0 2094200300046 ENDSUBENT 45 0 2094200399999 SUBENT 20942004 19810429 00002094200400001 BIB 5 21 2094200400002 REACTION ((92-U-238(N,G)92-U-239,,SIG)/ 2094200400003 (49-IN-115(N,G)49-IN-116-M,,SIG)) 2094200400004 SAMPLE .URANIUM AND INDIUM SAMPLES MOUNTED BACK TO BACK. 2094200400005 HIGHLY DEPLETED URANIUM USED FOR 12 HOURS BEFORE 2094200400006 NATURAL ACTIVITY BACKGROUND BECAME TO LARGE. 2094200400007 STATUS .TABLE 1. 2094200400008 HISTORY (790612C) 2094200400009 (790628E) 2094200400010 (810402A) 2094200400011 (810429E) 2094200400012 ERR-ANALYS (ERR-S) STATISTICAL UNCERTAINTY, 2094200400013 (ERR-1) INDIUM SAMPLE EFFICIENCY UNCERTAINTY, 2094200400014 (ERR-2) URANIUM SAMPLE EFFICIENCY UNCERTAINTY, 2094200400015 (ERR-3) BACKGROUND ACTIVITY UNCERTAINTY, 2094200400016 (ERR-4) UNCERTAINTIES OF OTHER CORRECTIONS, 2094200400017 (ERR-T) TOTAL UNCERTAINTY. 2094200400018 .ALL UNCERTAINTIES HAVE BEEN RECALCULATED TO ONE 2094200400019 SIGMA (68 PERCENT CONFIDENCE LEVEL) BY THE 2094200400020 COMPILER AND THE TOTAL UNCERTAINTY IS GIVEN AS 2094200400021 THE QUADRATIC SUM OF THE STATISTICAL AND THE 2094200400022 SYSTEMATIC UNCERTAINTIES. 2094200400023 ENDBIB 21 0 2094200400024 COMMON 4 3 2094200400025 ERR-1 ERR-2 ERR-3 ERR-4 2094200400026 PER-CENT PER-CENT PER-CENT PER-CENT 2094200400027 2.0000E-01 4.0000E-01 1.0000E-01 2.0000E-01 2094200400028 ENDCOMMON 3 0 2094200400029 DATA 5 4 2094200400030 EN EN-RSL RATIO ERR-S ERR-T 2094200400031 KEV KEV NO-DIM PER-CENT PER-CENT 2094200400032 1.5700E+02 2.0000E+01 6.8500E-01 1.4000E+00 1.5000E+00 2094200400033 2.3100E+02 1.8000E+01 6.9800E-01 1.4000E+00 1.5000E+00 2094200400034 5.5900E+02 1.5000E+01 7.3300E-01 1.3000E+00 1.4000E+00 2094200400035 6.2400E+02 1.4000E+01 7.7900E-01 1.5000E+00 1.6000E+00 2094200400036 ENDDATA 6 0 2094200400037 ENDSUBENT 36 0 2094200499999 ENDENTRY 4 0 2094299999999