ENTRY 22011 19880808 00002201100000001 SUBENT 22011001 19880808 00002201100100001 BIB 15 72 2201100100002 REFERENCE (J,NSE,93,348,86) MAIN REF. 2201100100003 (P,NEANDC(E)-272U,(5),6,8606) 2201100100004 TITLE -NEUTRON CAPTURE IN THE 1.15 KEV RESONANCE OF FE-56 2201100100005 USING MOXON-RAE DETECTORS. 2201100100006 AUTHOR (F.CORVI,C.BASTIAN,K.WISSHAK) 2201100100007 INSTITUTE (2ZZZGEL) 2201100100008 (2GERKFK) K.W. 2201100100009 FACILITY (LINAC,2ZZZGEL) THE GEEL 150 MEV LINAC WAS USED WITH 2201100100010 THE FOLLOWING PARAMETERS. ELECTRON ENERGY = 100 MEV, 2201100100011 FREQUENCY = 100 HZ, PEAK CURRENT = 100 A, PULSE 2201100100012 WIDTH = 1 NS, BEAM POWER = 1 KW. 2201100100013 INC-SOURCE .ROTARY URANIUM TARGET. 2201100100014 .MODERATOR CONSISTING OF A 4 CM SLAB OF WATER CANNED 2201100100015 IN BERYLLIUM. THE FLIGHT PATH WAS AT 9 DEG WITH 2201100100016 RESPECT TO THE NORMAL TO THE MODERATOR FACE. 2201100100017 .A 0.5 MM CADMIUM FILTER ABSOBED NEUTRONS FROM PRE- 2201100100018 VIOUS CYCLES. 2201100100019 INC-SPECT .THE NEUTRON SPECTRUM WAS MEASURED SIMULTANEOUS WITH 2201100100020 CAPTURE MEASUREMENTS USING A DOUBLE-GRIDDED IONIZA- 2201100100021 TION CHAMBER PLACED IN FRONT OF THE CAPTURE SAMPLE. 2201100100022 .THE NEUTRON BEAM WAS COLLIMATED DOWN TO 8 CM DIA- 2201100100023 METER. 2201100100024 .THE EXPERIMENT COVERED THE ENERGY RANGE 2 - 50000 EV. 2201100100025 METHOD (TOF) A FLIGHT PATH OF 28.4 M WAS USED. 2201100100026 DETECTOR (MOXR) THREE DIFFERENT MOXON-RAE DETECTORS WERE USED 2201100100027 SIMULTANEOUSLY, WITH BISMUTH, BISMUTH + CARBON, AND 2201100100028 CARBON CONVERTERS, RESPECTIVELY. IN THE FIRST RUN, 2201100100029 THE DETECTORS WERE PLACED AT 120 DEG WITH RESPECT TO 2201100100030 THE NEUTRON BEAM DIRECTION. IN A SECOND RUN THE ANGLE 2201100100031 WAS 90 DEG. 2201100100032 (IOCH) THE NEUTRON ENERGY SPECTRUM WAS MEASURED BY A 2201100100033 DOUBLE-GRIDDED IONIZATION CHAMBER HAVING AT ITS CENTER2201100100034 A CATHODE WITH BACK-TO-BACK B-10 DEPOSITS 40 MICRO- 2201100100035 GRAM/CM2 THICK. THE CHAMBER WAS OF THE CONTINOUS GAS 2201100100036 FLOW TYPE, USING A MIXTURE OF 95 PER CENT ARGON AND 2201100100037 5 PER CENT CARBON-DIOXIDE AT ATMOSPHERIC PRESSURE. 2201100100038 (SCIN) A 0.5 MM THICK LI-GLASS DETECTOR WAS USED TO 2201100100039 MAKE AN INDEPENDENT MEASUREMENT OF THE NEUTRON FLUX. 2201100100040 MONITOR (79-AU-197(N,G),,ARE) CAPTURE AT THE 4.91 EV RESONANCE,2201100100041 USING THE SATURATED RESONANCE METHOD. 2201100100042 SAMPLE .A 19.47 GRAM, 8 CM DIAMETER BY 0.5 MM THICK METALLIC 2201100100043 IRON SAMPLE, ENRICHED TO 99.87 PER CENT, WERE SAND- 2201100100044 WICHED BETWEEN TWO GOLD FOILS OF THICKNESSES 20 AND 2201100100045 30 MICROMETERS, RESPECTIVELY. 2201100100046 CORRECTION .THE DATA WERE CORRECTED FOR 2201100100047 A. THE DIFFERENCE IN NEUTRON FLUX AT 1152 AND 4.91 EV,2201100100048 B. THE INTENSITY DISTRIBUTION OF THE CAPTURE GAMMA-RAY2201100100049 SPECTRUM OF THE 1152 EV RESONANCE IN IRON, 2201100100050 C. THE INTENSITY DISTRIBUTION OF THE CAPTURE GAMMA-RAY2201100100051 SPECTRUM OF THE 4.91 EV RESONANCE IN GOLD, 2201100100052 D. THE VARIATION OF THE DETECTOR EFFICIENCY WITH 2201100100053 GAMMA-RAY ENERGY FOR EACH CONVERTER MATERIAL, 2201100100054 E. MULTIPLE SCATTERING, 2201100100055 F. THE GAMMA-RAY SELF-ABSORPTION IN THE SAMPLE. 2201100100056 THE COMBINATION OF CORRECTIONS B, C AND D AMOUNTS TO 2201100100057 0.883, 0.964 AND 1.076 FOR THE BI, BI + C AND C CON- 2201100100058 VERTERS, RESPECTIVELY. 2201100100059 ANALYSIS (AREA) AFTER SUBTRACTING THE BACKGROUND, THE DATA WERE 2201100100060 ANALYSED WITH THE AREA CODE TACASI, USING GAMMA-GAMMA 2201100100061 = 574 MILLI-EV, EFFECTIVE TEMPERATURE = 326 K, AND 2201100100062 EFFECTIVE SCATTERING RADIUS = 9 FM. 2201100100063 .THE SHAPE OF THE GAUSSIAN RESOLUTION FUNCTION WAS 2201100100064 VARIED IN ORDER TO OBTAIN THE BEST FITS. 2201100100065 STATUS .DATA WERE TAKEN FROM MAIN REF. 2201100100066 HISTORY (861117C) NO. 2201100100067 (861212E) 2201100100068 (870609A) IF. 2201100100069 (870827E) 2201100100070 (880125U) IF. 2201100100071 (880129E) 2201100100072 (880808U) IF. 2201100100073 (880810E) 2201100100074 ENDBIB 72 0 2201100100075 COMMON 2 3 2201100100076 EN-NRM EN-RES 2201100100077 EV EV 2201100100078 4.9100E+00 1.1520E+03 2201100100079 ENDCOMMON 3 0 2201100100080 ENDSUBENT 79 0 2201100199999 SUBENT 22011002 19880808 00002201100200001 BIB 6 16 2201100200002 REACTION ((26-FE-56(N,G),,WID,,G)*(26-FE-56(N,EL),,WID)/ 2201100200003 (26-FE-56(N,TOT),,WID)) 2201100200004 FLAG (1.) BISMUTH CONVERTER. 2201100200005 (2.) BISMUTH + CARBON CONVERTER. 2201100200006 (3.) CARBON CONVERTER. 2201100200007 ASSUMED .ANGLE OF THE MEASURE:120 DG 2201100200008 ERR-ANALYS (ERR-S) STATISTICAL ERRORS. 2201100200009 STATUS .DATA WERE TAKEN FROM MAIN REF. 2201100200010 HISTORY (861117C) NO. 2201100200011 (861212E) 2201100200012 (870609A) IF. SUBENTRY 2 SHARED IN SUBENTRIES 2 AND 4 2201100200013 (870827E) 2201100200014 (880125U) IF. 2201100200015 (880129E) 2201100200016 (880808U) IF. 2201100200017 (880810E) 2201100200018 ENDBIB 16 0 2201100200019 NOCOMMON 0 0 2201100200020 DATA 3 3 2201100200021 DATA ERR-S FLAG 2201100200022 MILLI-EV MILLI-EV NO-DIM 2201100200023 6.2300E+01 1.8000E+00 1.0000E+00 2201100200024 6.8100E+01 1.9000E+00 2.0000E+00 2201100200025 6.4200E+01 1.5000E+00 3.0000E+00 2201100200026 ENDDATA 5 0 2201100200027 ENDSUBENT 26 0 2201100299999 SUBENT 22011003 19880808 00002201100300001 BIB 6 28 2201100300002 REACTION ((26-FE-56(N,G),,WID,,G)*(26-FE-56(N,EL),,WID)/ 2201100300003 (26-FE-56(N,TOT),,WID)) 2201100300004 COMMENT .THESE DATA ARE OBTAINED BY AVERAGING THE DATA GIVEN 2201100300005 IN THE PREVIOUS SUBENTRY FOR THE DIFFERENT CONVER- 2201100300006 TERS. 2201100300007 ASSUMED .ANGLE OF THE MEASURE:120 DG 2201100300008 ERR-ANALYS (DATA-ERR) COMBINATION OF ERR-S AND ERR-1. 2201100300009 -ERR-S STATISTICAL ERRORS. 2201100300010 -ERR-1 SYSTEMATIC ERRORS, COMPOSED OF THE FOLLOWING 2201100300011 CONTRIBUTIONS 2201100300012 RELATIVE NEUTRON FLUX 1. PER CENT 2201100300013 GAMMA-RAY SELF ABSORPTION 1. PER CENT 2201100300014 4.91 EV RES. BACKGROUND ERROR .4-1. PER CENT 2201100300015 MULTIPLE SCATTERING 1. PER CENT 2201100300016 1152 EV RES. BACKGROUND ERROR 1.1-1.4 PER CENT 2201100300017 SAMPLE MASS .3 PER CENT 2201100300018 INPUT RESONANCE PARAMETERS 1. PER CENT 2201100300019 TOTAL SYSTEMATIC ERROR /EXCEPT 2201100300020 EFFICIENCY CORRECTION ERRORS/ 2.4-2.7 PER CENT 2201100300021 STATUS .DATA WERE TAKEN FROM MAIN REF. 2201100300022 HISTORY (861117C) NO. 2201100300023 (861212E) 2201100300024 (870609A) IF. SUBENTRY 3 SHARED IN SUBENTRIES 3 AND 5 2201100300025 (870827E) 2201100300026 (880125U) IF. 2201100300027 (880129E) 2201100300028 (880808U) IF. 2201100300029 (880810E) 2201100300030 ENDBIB 28 0 2201100300031 NOCOMMON 0 0 2201100300032 DATA 2 1 2201100300033 DATA DATA-ERR 2201100300034 MILLI-EV MILLI-EV 2201100300035 6.4900E+01 2.4000E+00 2201100300036 ENDDATA 3 0 2201100300037 ENDSUBENT 36 0 2201100399999 SUBENT 22011004 19880808 00002201100400001 BIB 6 14 2201100400002 REACTION ((26-FE-56(N,G),,WID,,G)*(26-FE-56(N,EL),,WID)/ 2201100400003 (26-FE-56(N,TOT),,WID)) 2201100400004 FLAG (1.) BISMUTH CONVERTER. 2201100400005 (2.) BISMUTH + CARBON CONVERTER. 2201100400006 (3.) CARBON CONVERTER. 2201100400007 ASSUMED .ANGLE OF THE MEASURE: 90 DG 2201100400008 ERR-ANALYS (ERR-S) STATISTICAL ERRORS. 2201100400009 STATUS .DATA WERE TAKEN FROM MAIN REF. 2201100400010 HISTORY (870609A) IF. PREVIOUSLY IN SUBENTRY 2 2201100400011 (870827E) 2201100400012 (880125U) IF. 2201100400013 (880129E) 2201100400014 (880808U) IF. 2201100400015 (880810E) 2201100400016 ENDBIB 14 0 2201100400017 NOCOMMON 0 0 2201100400018 DATA 3 3 2201100400019 DATA ERR-S FLAG 2201100400020 MILLI-EV MILLI-EV NO-DIM 2201100400021 6.0500E+01 1.2000E+00 1.0000E+00 2201100400022 6.7200E+01 1.3000E+00 2.0000E+00 2201100400023 6.2800E+01 1.0000E+00 3.0000E+00 2201100400024 ENDDATA 5 0 2201100400025 ENDSUBENT 24 0 2201100499999 SUBENT 22011005 19880808 00002201100500001 BIB 6 26 2201100500002 REACTION ((26-FE-56(N,G),,WID,,G)*(26-FE-56(N,EL),,WID)/ 2201100500003 (26-FE-56(N,TOT),,WID)) 2201100500004 COMMENT .THESE DATA ARE OBTAINED BY AVERAGING THE DATA GIVEN 2201100500005 IN THE PREVIOUS SUBENTRY FOR THE DIFFERENT CONVER- 2201100500006 TERS. 2201100500007 ASSUMED .ANGLE OF THE MEASURE: 90 DG 2201100500008 ERR-ANALYS (DATA-ERR) COMBINATION OF ERR-S AND ERR-1. 2201100500009 -ERR-S STATISTICAL ERRORS. 2201100500010 -ERR-1 SYSTEMATIC ERRORS, COMPOSED OF THE FOLLOWING 2201100500011 CONTRIBUTIONS 2201100500012 RELATIVE NEUTRON FLUX 1. PER CENT 2201100500013 GAMMA-RAY SELF ABSORPTION 1. PER CENT 2201100500014 4.91 EV RES. BACKGROUND ERROR .4-1. PER CENT 2201100500015 MULTIPLE SCATTERING 1. PER CENT 2201100500016 1152 EV RES. BACKGROUND ERROR 1.1-1.4 PER CENT 2201100500017 SAMPLE MASS .3 PER CENT 2201100500018 INPUT RESONANCE PARAMETERS 1. PER CENT 2201100500019 TOTAL SYSTEMATIC ERROR /EXCEPT 2201100500020 EFFICIENCY CORRECTION ERRORS/ 2.4-2.7 PER CENT 2201100500021 STATUS .DATA WERE TAKEN FROM MAIN REF. 2201100500022 HISTORY (870609A) IF. PREVIOUSLY IN SUBENTRY 3 2201100500023 (870827E) 2201100500024 (880125U) IF. 2201100500025 (880129E) 2201100500026 (880808U) IF. 2201100500027 (880810E) 2201100500028 ENDBIB 26 0 2201100500029 NOCOMMON 0 0 2201100500030 DATA 2 1 2201100500031 DATA DATA-ERR 2201100500032 MILLI-EV MILLI-EV 2201100500033 6.3500E+10 2.1000E+00 2201100500034 ENDDATA 3 0 2201100500035 ENDSUBENT 34 0 2201100599999 ENDENTRY 5 0 2201199999999