ENTRY 20924 19790628 00002092400000001 SUBENT 20924001 19790628 00002092400100001 BIB 9 19 2092400100002 INSTITUTE (2ITYCAT) 2092400100003 REFERENCE (J,NP,39,621,6212) 2092400100004 (J,NP,47,129,6308) STATISTICAL FLUCTUATION ANAL. 2092400100005 (J,NC,23,1136,6203) LEVEL DENSITY ANALYSIS. 2092400100006 AUTHOR (G.CALVI,R.POTENZA,R.RICAMO,D.VINCIGUERRA) 2092400100007 TITLE -NEUTRON REACTIONS IN AL FROM 2.5 TO 5 MEV- 2092400100008 FACILITY (VDG ) 2 MEV VAN DE GRAAFF PRODUCING DEUTERONS 2092400100009 WITH 1 PERCENT ENERGY DEFINITION. 2092400100010 INC-SOURCE (D-D ) USING A HEAVY ICE TARGET SUPPORTED ON COPPER 2092400100011 AND COOLED BY LIQUID AIR. VARIOUS NEUTRON 2092400100012 ENERGIES OBTAINED BY USING DIFFERENT ANGLES. 2092400100013 COMMENT .THE STRUCTURE OF THE CROSS SECTIONS ARE INTERPRETED 2092400100014 AS DUE TO STATISTICAL FLUCTUATIONS IN THE LEVEL 2092400100015 DENSITY OF THE AL-28 INTEMEDIATE NUCLEUS. 2092400100016 STATUS (NDD ) DATA ARE TAKEN FROM A PRIVATE COMMUNICATION, 2092400100017 G.GALVI, FEBRUARY 1966. 2092400100018 GRAPHICAL DATA GIVEN IN THE PUBLICATION. 2092400100019 HISTORY (790516C) 2092400100020 (790628E) 2092400100021 ENDBIB 19 0 2092400100022 NOCOMMON 0 0 2092400100023 ENDSUBENT 22 0 2092400199999 SUBENT 20924002 19790628 00002092400200001 BIB 9 30 2092400200002 REACTION (13-AL-27(N,G)13-AL-28,,SIG) 2092400200003 SAMPLE .AL DISKS, 25 MM IN DIAMETER, 3 MM THICK. 2092400200004 METHOD (ACTIV) TWO SAMPLES IRRADIATED AND THEN MEASURED 2092400200005 SIMULTANEOUSLY. ONE SAMPLE, PLACED AT ZERO 2092400200006 DEGREES RELATIVE TO THE DEUTERON BEAM, ACTED 2092400200007 AS THE MONITOR. 2092400200008 DETECTOR (COIN,GEMUC,GEMUC) TWO GEIGER-MUELLER COUNTERS, ONE 2092400200009 INSIDE THE OTHER, USED IN ANTI-COINCIDENCE 2092400200010 TO REDUCE THE BACKGROUND. 2092400200011 DECAY-DATA (13-AL-28,2.3MIN,B,2870.,,DG,1780.) 2092400200012 MONITOR (13-AL-27(N,G)13-AL-28,,SIG) NORMALISED AROUND 3.5 2092400200013 MEV TO THE VALUES REPORTED BY H.J.HOWERTON, 2092400200014 TABULATED NEUTRON CROSS SECTION, 1959, UNIV. 2092400200015 OF CALIFORNIA. 2092400200016 STATUS (NDD ) DATA FROM PRIVATE COMMUNICATION, G.CALVI, 2092400200017 FEBRUARY 1966. 2092400200018 GRAPHICAL DATA IS GIVEN IN THE PUBLICATION. 2092400200019 CORRECTION .THE MEASURED ACTIVITY OF THE SAMPLE WAS NORMALISED 2092400200020 TO THE MONITOR ACTIVITY AND CORRECTED BY THE D(D,N) 2092400200021 DIFFERENTIAL CROSS SECTION IN THE LABORATORY SYSTEM 2092400200022 REPORTED BY J.L.FOWLER AND J.E.BROLLEY, 2092400200023 REV.MOD.PHYS.,28,(1956),103. 2092400200024 .CORRECTION MADE FOR THE PARTIAL ACTIVITY OF MG-27 2092400200025 FORMED IN THE COMPETING (N,P) REACTION. 2092400200026 .CORRECTIONS MADE FOR THE RELATIVE EFFICIENCIES OF 2092400200027 THE TWO GEIGER MUELLER COUNTERS. 2092400200028 ERR-ANALYS .THE MEAN RELATIVE ERROR OF THE CROSS SECTION RANGES 2092400200029 FROM 15 PERCENT AT 3.5 MEV TO 20 PERCENT AT 5 MEV. 2092400200030 .CROSS SECTIONS OBTAINED BY AVERAGING OVER FOUR 2092400200031 MEASUREMENTS WHICH SHOWED THE SAME BEHAVIOR. 2092400200032 ENDBIB 30 0 2092400200033 NOCOMMON 0 0 2092400200034 DATA 3 30 2092400200035 EN EN-ERR DATA 2092400200036 MEV MEV B 2092400200037 3.4400E+00 3.0000E-02 3.4000E-04 2092400200038 3.5000E+00 3.0000E-02 4.2000E-04 2092400200039 3.5600E+00 3.0000E-02 5.2000E-04 2092400200040 3.6300E+00 3.0000E-02 2.5000E-04 2092400200041 3.6900E+00 3.0000E-02 3.8000E-04 2092400200042 3.7600E+00 4.0000E-02 4.4000E-04 2092400200043 3.8200E+00 5.0000E-02 3.4000E-04 2092400200044 3.8900E+00 5.0000E-02 3.8000E-04 2092400200045 3.9500E+00 5.0000E-02 4.1000E-04 2092400200046 4.0100E+00 5.0000E-02 3.8000E-04 2092400200047 4.0700E+00 5.0000E-02 3.2000E-04 2092400200048 4.1400E+00 5.0000E-02 4.3000E-04 2092400200049 4.2000E+00 5.0000E-02 2.6000E-04 2092400200050 4.2600E+00 5.0000E-02 3.6000E-04 2092400200051 4.3100E+00 6.0000E-02 3.5000E-04 2092400200052 4.4300E+00 6.0000E-02 1.7000E-04 2092400200053 4.5100E+00 7.0000E-02 2.2000E-04 2092400200054 4.5600E+00 7.0000E-02 2.8000E-04 2092400200055 4.6100E+00 7.0000E-02 2.4000E-04 2092400200056 4.6600E+00 7.0000E-02 1.9000E-04 2092400200057 4.7000E+00 7.0000E-02 2.3000E-04 2092400200058 4.7400E+00 7.0000E-02 2.4000E-04 2092400200059 4.7800E+00 7.0000E-02 2.5000E-04 2092400200060 4.8200E+00 7.0000E-02 2.2000E-04 2092400200061 4.8500E+00 8.0000E-02 2.1000E-04 2092400200062 4.9000E+00 8.0000E-02 2.0000E-04 2092400200063 4.9200E+00 8.0000E-02 1.8000E-04 2092400200064 4.9400E+00 8.0000E-02 2.0000E-04 2092400200065 4.9600E+00 8.0000E-02 2.3000E-04 2092400200066 5.0000E+00 8.0000E-02 2.3000E-04 2092400200067 ENDDATA 32 0 2092400200068 ENDSUBENT 67 0 2092400299999 SUBENT 20924003 19790628 00002092400300001 BIB 9 25 2092400300002 REACTION (13-AL-27(N,P)12-MG-27,,SIG) 2092400300003 SAMPLE .AL DISKS, 25 MM DIAMETER, 3 MM THICK. 2092400300004 METHOD (ACTIV) ACTIVATION. FIVE SAMPLES ACTIVATED AND 2092400300005 MEASURED SIMULTANEOUSLY. ONE SAMPLE PLACED 2092400300006 AT ZERO DEGREES RELATIVE TO THE DEUTERON 2092400300007 BEAM ACTED AS MONITOR. 2092400300008 DETECTOR (GEMUC) FIVE GEIGER-MUELLER COUNTERS, ONE FOR EACH 2092400300009 SAMPLE, COUNTED ACTIVITIES SIMULTANEOUSLY. 2092400300010 DECAY-DATA (12-MG-27,9.5MIN,B,1590.,0.42,B,1750.,0.58) 2092400300011 MONITOR (13-AL-27(N,P)12-MG-27,,SIG) NORMALISED BETWEEN 4.5 2092400300012 AND 5 MEV TO THE VALUES REPORTED BY- 2092400300013 D.J.HUGHES AND J.A.HARVEY, REPORT BNL-325, 2092400300014 (1958). 2092400300015 STATUS (NDD ) DATA FROM PRIVATE COMMUNICATION, G.CALVI, 2092400300016 FEBRUARY 1966. 2092400300017 GRAPHICAL DATA GIVEN IN THE PUBLICATION. 2092400300018 CORRECTION .MEASURED ACTIVITY OF THE FOUR SAMPLES NORMALISED TO 2092400300019 THE MONITOR ACTIVITY AND CORRECTED BY THE D(D,N) 2092400300020 DIFFERENTIAL CROSS SECTION IN THE LABORATORY SYSTEM 2092400300021 GIVEN BY J.L.FOWLER AND J.E.BROLLEY, REV.MOD.PHYS., 2092400300022 28,(1956),103. 2092400300023 ERR-ANALYS .STANDARD ERROR DUE TO STATISTICAL FLUCTUATIONS WAS 2092400300024 10 PERCENT AT 3 MEV AND 2 PERCENT AT 5 MEV. 2092400300025 .FINAL VALUES OBTAINED BY AVERAGING OVER TWO RUNS 2092400300026 WHICH SHOWED THE SAME BEHAVIOUR. 2092400300027 ENDBIB 25 0 2092400300028 COMMON 1 3 2092400300029 EN-RSL 2092400300030 MEV 2092400300031 5.0000E-02 2092400300032 ENDCOMMON 3 0 2092400300033 DATA 2 49 2092400300034 EN DATA 2092400300035 MEV B 2092400300036 2.6220E+00 1.7000E-03 2092400300037 2.6720E+00 1.6000E-03 2092400300038 2.7260E+00 1.5000E-03 2092400300039 2.7750E+00 2.4000E-03 2092400300040 2.8290E+00 2.5000E-03 2092400300041 2.8830E+00 2.4000E-03 2092400300042 2.9370E+00 2.6000E-03 2092400300043 2.9960E+00 3.3000E-03 2092400300044 3.0550E+00 3.5000E-03 2092400300045 3.1140E+00 3.3000E-03 2092400300046 3.1680E+00 3.3000E-03 2092400300047 3.2320E+00 3.2000E-03 2092400300048 3.2960E+00 3.0000E-03 2092400300049 3.3550E+00 3.2000E-03 2092400300050 3.4190E+00 4.0000E-03 2092400300051 3.4780E+00 6.9000E-03 2092400300052 3.5420E+00 9.1000E-03 2092400300053 3.6110E+00 6.0000E-03 2092400300054 3.6700E+00 9.3000E-03 2092400300055 3.7330E+00 7.4000E-03 2092400300056 3.7970E+00 1.1900E-02 2092400300057 3.8610E+00 8.5000E-03 2092400300058 3.9200E+00 9.0000E-03 2092400300059 3.9890E+00 1.0100E-02 2092400300060 4.0380E+00 1.1000E-02 2092400300061 4.1060E+00 9.5000E-03 2092400300062 4.1640E+00 8.3000E-03 2092400300063 4.2230E+00 9.8000E-03 2092400300064 4.3360E+00 1.4500E-02 2092400300065 4.3770E+00 1.0100E-02 2092400300066 4.3900E+00 1.4500E-02 2092400300067 4.4360E+00 1.3800E-02 2092400300068 4.4970E+00 1.6400E-02 2092400300069 4.5450E+00 1.7300E-02 2092400300070 4.6000E+00 2.2000E-02 2092400300071 4.6350E+00 2.1700E-02 2092400300072 4.6570E+00 1.9900E-02 2092400300073 4.6740E+00 2.2700E-02 2092400300074 4.7150E+00 2.2800E-02 2092400300075 4.7580E+00 1.9800E-02 2092400300076 4.8150E+00 1.8000E-02 2092400300077 4.8310E+00 1.5600E-02 2092400300078 4.8870E+00 1.6600E-02 2092400300079 4.9430E+00 1.9500E-02 2092400300080 4.9770E+00 2.0100E-02 2092400300081 5.0120E+00 2.0200E-02 2092400300082 5.0460E+00 2.4200E-02 2092400300083 5.0760E+00 2.3300E-02 2092400300084 5.1000E+00 2.1900E-02 2092400300085 ENDDATA 51 0 2092400300086 ENDSUBENT 85 0 2092400399999 SUBENT 20924004 19790628 00002092400400001 BIB 8 29 2092400400002 REACTION (13-AL-27(N,TOT),,SIG) 2092400400003 SAMPLE .AL SCATTERER, 24 MM IN DIAMETER, GIVING MEAN TRANS- 2092400400004 MISSION OF 0.2, PLACED HALFWAY BETWEEN SOURCE AND 2092400400005 DETECTOR. 2092400400006 METHOD .TRANSMISSION MEASUREMENT. 2092400400007 DETECTOR (SCIN ) 1.EMMERICH SCINTILLATOR, 25 MM IN DIAMETER, 2092400400008 COUPLED TO A DUMONT 6342 PHOTOMULTIPLIER AND 2092400400009 PLACED AT 60 CM FROM THE SOURCE. 2092400400010 2.NEUTRON SOURCE INTENSITY MONITORED AT 135 2092400400011 DEGREES BY A SIMILAR SCINTILLATOR PLACED 40 2092400400012 CM FROM THE SOURCE. 2092400400013 PART-DET (N ) NEUTRONS. 2092400400014 .NEUTRON ENERGY SPREAD AT THE SAMPLE DUE TO DEUTERON 2092400400015 ENERGY LOSS IN THE HEAVY ICE TARGET RANGED FROM 20 2092400400016 KEV AT 3 MEV TO NEARLY 50 KEV AT 5 MEV. 2092400400017 .IN ADDITION THE ENERGY SPREAD DUE TO THE FINITE 2092400400018 ANGLE SUBTENDED BY THE DETECTOR WAS ALWAYS BETTER 2092400400019 THAN 50 KEV. 2092400400020 STATUS (NDD ) DATA FROM PRIVATE COMMUNICATION, G.CALVI, 2092400400021 FEBRUARY 1966. 2092400400022 GRAPHICAL DATA GIVEN IN THE PUBLICATION. 2092400400023 CORRECTION .CROSS SECTIONS WERE NOT CORRECTED FOR INSCATTERING 2092400400024 WHICH WAS ESTIMATED TO CAUSE AN UNCERTAINTY OF 2092400400025 ABOUT 1 PERCENT. 2092400400026 ERR-ANALYS .CROSS SECTIONS GIVEN ARE THE AVERAGE VALUES OF THREE 2092400400027 MEASUREMENTS CARRIED OUT WITH A STATISTICAL ACCURACY 2092400400028 OF ABOUT 2 PERCENT. 2092400400029 .THICKNESS OF SAMPLE KNOWN WITH A PRECISION OF 1 PC. 2092400400030 .MEAN RELATIVE ERROR GIVEN. 2092400400031 ENDBIB 29 0 2092400400032 COMMON 1 3 2092400400033 DATA-ERR 2092400400034 PER-CENT 2092400400035 1.1000E+00 2092400400036 ENDCOMMON 3 0 2092400400037 DATA 3 100 2092400400038 EN EN-ERR DATA 2092400400039 MEV MEV B 2092400400040 2.4850E+00 5.0000E-03 2.5200E+00 2092400400041 2.5050E+00 5.0000E-03 2.9300E+00 2092400400042 2.5300E+00 1.0000E-02 3.3000E+00 2092400400043 2.5550E+00 1.0000E-02 3.3000E+00 2092400400044 2.5800E+00 1.0000E-02 3.2700E+00 2092400400045 2.6000E+00 1.5000E-02 3.3800E+00 2092400400046 2.6250E+00 1.5000E-02 3.1200E+00 2092400400047 2.6460E+00 2.0000E-02 2.9200E+00 2092400400048 2.6750E+00 2.0000E-02 2.9500E+00 2092400400049 2.7050E+00 2.0000E-02 2.7400E+00 2092400400050 2.7300E+00 2.0000E-02 2.8800E+00 2092400400051 2.7600E+00 2.0000E-02 2.9300E+00 2092400400052 2.7900E+00 2.0000E-02 2.6200E+00 2092400400053 2.8150E+00 2.0000E-02 2.4400E+00 2092400400054 2.8500E+00 2.0000E-02 2.5500E+00 2092400400055 2.8800E+00 1.0000E-02 2.6200E+00 2092400400056 2.9050E+00 1.0000E-02 2.5200E+00 2092400400057 2.9350E+00 1.5000E-02 2.6900E+00 2092400400058 2.9650E+00 1.5000E-02 2.6100E+00 2092400400059 2.9950E+00 1.5000E-02 2.4900E+00 2092400400060 3.0250E+00 1.5000E-02 2.5300E+00 2092400400061 3.0550E+00 1.5000E-02 2.4800E+00 2092400400062 3.0850E+00 1.5000E-02 2.5700E+00 2092400400063 3.1150E+00 1.5000E-02 2.4400E+00 2092400400064 3.1500E+00 2.0000E-02 2.4300E+00 2092400400065 3.1800E+00 2.0000E-02 2.4200E+00 2092400400066 3.2100E+00 2.0000E-02 2.5800E+00 2092400400067 3.2450E+00 1.5000E-02 2.5800E+00 2092400400068 3.2600E+00 1.5000E-02 2.3800E+00 2092400400069 3.3120E+00 1.5000E-02 2.4800E+00 2092400400070 3.3460E+00 1.5000E-02 2.5600E+00 2092400400071 3.3780E+00 1.5000E-02 2.4500E+00 2092400400072 3.4120E+00 1.5000E-02 2.4300E+00 2092400400073 3.4450E+00 2.0000E-02 2.4600E+00 2092400400074 3.4780E+00 2.0000E-02 2.4400E+00 2092400400075 3.5110E+00 2.0000E-02 2.4900E+00 2092400400076 3.5430E+00 2.0000E-02 2.6600E+00 2092400400077 3.5750E+00 2.5000E-02 2.7200E+00 2092400400078 3.6090E+00 2.5000E-02 2.5300E+00 2092400400079 3.6420E+00 2.5000E-02 2.4300E+00 2092400400080 3.6750E+00 2.5000E-02 2.5000E+00 2092400400081 3.7090E+00 2.5000E-02 2.5000E+00 2092400400082 3.7420E+00 2.5000E-02 2.5300E+00 2092400400083 3.7760E+00 3.0000E-02 2.4000E+00 2092400400084 3.7900E+00 3.0000E-02 2.4600E+00 2092400400085 3.8100E+00 3.0000E-02 2.3500E+00 2092400400086 3.8210E+00 2.0000E-02 2.3900E+00 2092400400087 3.8550E+00 2.0000E-02 2.3300E+00 2092400400088 3.8770E+00 2.0000E-02 2.4400E+00 2092400400089 3.9220E+00 2.5000E-02 2.4500E+00 2092400400090 3.9540E+00 2.5000E-02 2.4400E+00 2092400400091 3.9870E+00 2.5000E-02 2.4100E+00 2092400400092 4.0200E+00 2.5000E-02 2.6400E+00 2092400400093 4.0540E+00 2.5000E-02 2.4400E+00 2092400400094 4.0850E+00 3.0000E-02 2.3800E+00 2092400400095 4.1160E+00 3.0000E-02 2.4500E+00 2092400400096 4.1490E+00 3.0000E-02 2.3900E+00 2092400400097 4.1800E+00 3.5000E-02 2.3400E+00 2092400400098 4.2140E+00 3.5000E-02 2.2900E+00 2092400400099 4.2460E+00 3.5000E-02 2.2900E+00 2092400400100 4.2770E+00 3.5000E-02 2.3000E+00 2092400400101 4.3060E+00 4.0000E-02 2.3900E+00 2092400400102 4.3400E+00 4.0000E-02 2.3800E+00 2092400400103 4.3720E+00 4.0000E-02 2.2400E+00 2092400400104 4.4020E+00 4.0000E-02 2.2600E+00 2092400400105 4.4310E+00 4.5000E-02 2.2300E+00 2092400400106 4.4650E+00 4.5000E-02 2.2500E+00 2092400400107 4.4950E+00 4.5000E-02 2.3000E+00 2092400400108 4.5200E+00 4.5000E-02 2.2700E+00 2092400400109 4.5550E+00 4.5000E-02 2.2500E+00 2092400400110 4.5810E+00 4.5000E-02 2.2900E+00 2092400400111 4.6080E+00 4.5000E-02 2.3000E+00 2092400400112 4.6260E+00 5.0000E-02 2.3300E+00 2092400400113 4.6430E+00 5.0000E-02 2.3500E+00 2092400400114 4.6730E+00 5.0000E-02 2.3100E+00 2092400400115 4.7030E+00 5.5000E-02 2.3500E+00 2092400400116 4.7300E+00 5.5000E-02 2.3500E+00 2092400400117 4.7560E+00 3.0000E-02 2.4300E+00 2092400400118 4.7800E+00 3.0000E-02 2.4000E+00 2092400400119 4.8060E+00 3.0000E-02 2.3100E+00 2092400400120 4.8300E+00 3.5000E-02 2.2300E+00 2092400400121 4.8470E+00 3.5000E-02 2.2300E+00 2092400400122 4.8670E+00 3.5000E-02 2.2500E+00 2092400400123 4.8860E+00 3.5000E-02 2.2600E+00 2092400400124 4.9070E+00 3.5000E-02 2.2600E+00 2092400400125 4.9270E+00 3.5000E-02 2.3200E+00 2092400400126 4.9450E+00 4.0000E-02 2.3000E+00 2092400400127 4.9630E+00 4.0000E-02 2.3900E+00 2092400400128 4.9840E+00 4.0000E-02 2.4100E+00 2092400400129 5.0050E+00 4.0000E-02 2.4400E+00 2092400400130 5.0220E+00 2.0000E-02 2.4200E+00 2092400400131 5.0400E+00 2.0000E-02 2.4200E+00 2092400400132 5.0560E+00 2.0000E-02 2.4000E+00 2092400400133 5.0710E+00 2.5000E-02 2.3700E+00 2092400400134 5.0860E+00 2.5000E-02 2.3200E+00 2092400400135 5.1000E+00 2.5000E-02 2.3500E+00 2092400400136 5.1260E+00 2.5000E-02 2.3300E+00 2092400400137 5.1580E+00 3.0000E-02 2.2700E+00 2092400400138 5.1880E+00 3.0000E-02 2.2000E+00 2092400400139 5.2100E+00 3.0000E-02 2.1000E+00 2092400400140 ENDDATA 102 0 2092400400141 ENDSUBENT 140 0 2092400499999 ENDENTRY 4 0 2092499999999