ENTRY 22143 19910124 00002214300000001 SUBENT 22143001 19910124 00002214300100001 BIB 15 43 2214300100002 REFERENCE (J,ZP/A,335,41,9001) MAIN REFERENCE. 2214300100003 (J,NIM/A,267,466,88) DETAILS OF IONISATION CHAMBER 2214300100004 RUNNING IN 'DELTA E - E' MODE. 2214300100005 TITLE -CHARACTERISTICS OF MASS AND NUCLEAR CHARGE DISTRI- 2214300100006 BUTIONS OF 229-TH(N-TH,F). IMPLICATIONS FOR FISSION 2214300100007 DYNAMICS. 2214300100008 AUTHOR (J.P.BOCQUET,R.BRISSOT,H.R.FAUST,M.FOWLER,J.WILHELMY, 2214300100009 M.ASGHAR,M.DJEBARA) 2214300100010 INSTITUTE (2FR ILL) J.P.B., H.R.F. AND EXPERIMENTAL SITE. 2214300100011 (2FR GRE) R.B. 2214300100012 (1USALAS) M.F., J.W. 2214300100013 (3ALGALG) M.A., M.D. 2214300100014 FACILITY (REAC,2FR ILL) GRENOBLE HIGH-FLUX REACTOR, DELIVERING 2214300100015 A THERMAL NEUTRON FLUX OF 5.0E14 N/CM2/SEC ONTO THE 2214300100016 229-TH TARGET. 2214300100017 INC-SOURCE (REAC ) 2214300100018 INC-SPECT .THERMAL REACTOR SPECTRUM. 2214300100019 METHOD (REC ) THE ILL RECOIL SPECTROMETER LOHENGRIN, WHERE 2214300100020 (ASEP ) THE FISSION PRODUCTS ARE SELECTED IN FLIGHT 2214300100021 ACCORDING TO THE MAGNETIC AND ELECTRIC FIELD SETTINGS,2214300100022 WAS USED FOR THE MEASUREMENTS. 2214300100023 DETECTOR (IOCH ) AN IONIZATION CHAMBER RUNNING IN 'DELTA E - E' 2214300100024 MODE WAS USED TO DETECT THE FISSION PRODUCTS. THE 2214300100025 ENERGY SPREAD OF THE ION BEAM ENTERING THE CHAMBER IS 2214300100026 AROUND 1 MEV, WHICH IS LOW ENOUGH TO SEPARATE UNAMBIG-2214300100027 UOUSLY THE A/Q COMPONENTS (MASS OVER IONIC CHARGE 2214300100028 RATIOS). 2214300100029 PART-DET (FF ) 2214300100030 SAMPLE .THE SAMPLE CONSISTED OF A 50 MICRO-G/CM2 ELECTRO- 2214300100031 DEPOSITED LAYER OF 229-TH ON A THICK TITANIUM BACKING.2214300100032 A 40 X 3 MM2 DIAPHRAGM WAS PLACED IN FRONT TO OBTAIN 2214300100033 THE REQUIRED MASS RESOLUTION. THE CHANGE OF FISSION 2214300100034 RATE WITH TIME WAS MONITORED. 2214300100035 CORRECTION .THE FRAGMENT ENERGIES WERE CORRECTED FOR THE LOSSES IN2214300100036 THE SAMPLE MATERIAL, AND THE DATA WERE CORRECTED FOR 2214300100037 ENERGY DISPERSION OF THE SPECTROMETER AND FOR THE 2214300100038 BURNUP OF THE SAMPLE. 2214300100039 ERR-ANALYS (DATA-ERR) NO DETAILS GIVEN. 2214300100040 STATUS .DATA TAKEN FROM MAIN REFERENCE. 2214300100041 HISTORY (900817C) S.W. 2214300100042 (900917E) 2214300100043 (910124A) S.W. REACTION MODIFIED IN SUBENT 002 AND 003 2214300100044 (910205E) 2214300100045 ENDBIB 43 0 2214300100046 COMMON 1 3 2214300100047 EN-DUMMY 2214300100048 EV 2214300100049 2.5300E-02 2214300100050 ENDCOMMON 3 0 2214300100051 ENDSUBENT 50 0 2214300199999 SUBENT 22143002 19910617 00002214300200001 BIB 5 21 2214300200002 REACTION ((90-TH-229(N,F)ELEM/MASS,IND,FY,,MXW)/ 2214300200003 (90-TH-229(N,F)MASS,CHN,FY,,MXW)) 2214300200004 .PRE-DELAYED NEUTRON FRACTIONAL INDEPENDENT YIELDS NOR-2214300200005 MALISED TO A TOTAL OF UNITY FOR EACH MASS VALUE A. 2214300200006 RESULT (FRIND) 2214300200007 ANALYSIS .THE NUCLEAR CHARGE YIELDS Y(A,Q,E,Z) WERE OBTAINED FOR2214300200008 A GIVEN MASS, ENERGY AND IONIC CHARGE STATE BY A LEAST2214300200009 SQUARE ANALYSIS OF THE 'DELTA E' SPECTRUM, ASSUMING A 2214300200010 GAUSSIAN RESPONSE OF THE IONIZATION CHAMBER TO A 2214300200011 SINGLE NUCLEAR CHARGE COMPONENT. THE CONTRIBUTIONS OF 2214300200012 ALL IONIC CHARGE STATES MUST BE SUMMED AT THE DIFF- 2214300200013 ERENT KINETIC ENERGIES, WITH UNMEASURED CHARGE STATES 2214300200014 BEING INTERPOLATED BY FITTING GAUSSIAN SHAPES TO THE 2214300200015 MEASURED YIELDS. THE INDEPENDENT YIELDS Y(A,Z) ARE 2214300200016 THEN OBTAINED BY INTEGRATING OVER THE KINETIC ENERGY 2214300200017 DISTRIBUTION BY MEANS OF A GAUSSIAN FIT. 2214300200018 STATUS .DATA TAKEN FROM MAIN REFERENCE. 2214300200019 HISTORY (900817C) S.W. 2214300200020 (900917E) 2214300200021 (910124A) S.W. REACTION MODIFIED 2214300200022 (910205E) 2214300200023 ENDBIB 21 0 2214300200024 NOCOMMON 0 0 2214300200025 DATA 4 72 2214300200026 MASS ELEMENT DATA DATA-ERR 2214300200027 NO-DIM NO-DIM NO-DIM NO-DIM 2214300200028 7.8000E+01 3.1000E+01 2.7100E-01 5.6000E-02 2214300200029 7.8000E+01 3.2000E+01 7.2900E-01 9.0000E-02 2214300200030 7.9000E+01 3.1000E+01 1.7600E-01 3.9000E-02 2214300200031 7.9000E+01 3.2000E+01 7.8600E-01 8.6000E-02 2214300200032 7.9000E+01 3.3000E+01 3.7000E-02 1.2000E-02 2214300200033 8.0000E+01 3.1000E+01 2.1000E-02 1.0000E-02 2214300200034 8.0000E+01 3.2000E+01 9.4800E-01 3.7000E-02 2214300200035 8.0000E+01 3.3000E+01 3.1000E-02 1.6000E-02 2214300200036 8.1000E+01 3.1000E+01 1.2000E-02 1.0000E-02 2214300200037 8.1000E+01 3.2000E+01 7.1400E-01 2.6000E-02 2214300200038 8.1000E+01 3.3000E+01 2.4800E-01 1.7000E-02 2214300200039 8.1000E+01 3.4000E+01 2.6000E-02 1.1000E-02 2214300200040 8.2000E+01 3.2000E+01 3.3600E-01 1.6000E-02 2214300200041 8.2000E+01 3.3000E+01 4.0000E-01 2.0000E-02 2214300200042 8.2000E+01 3.4000E+01 2.3800E-01 1.7000E-02 2214300200043 8.2000E+01 3.5000E+01 2.5000E-02 1.0000E-02 2214300200044 8.3000E+01 3.2000E+01 3.0000E-02 1.0000E-02 2214300200045 8.3000E+01 3.3000E+01 3.2600E-01 1.6000E-02 2214300200046 8.3000E+01 3.4000E+01 6.2600E-01 2.1000E-02 2214300200047 8.3000E+01 3.5000E+01 1.8000E-02 1.1000E-02 2214300200048 8.4000E+01 3.2000E+01 5.0000E-03 1.0000E-02 2214300200049 8.4000E+01 3.3000E+01 7.7000E-02 1.0000E-02 2214300200050 8.4000E+01 3.4000E+01 8.8300E-01 1.9000E-02 2214300200051 8.4000E+01 3.5000E+01 3.6000E-02 1.1000E-02 2214300200052 8.5000E+01 3.3000E+01 3.0000E-02 1.3000E-02 2214300200053 8.5000E+01 3.4000E+01 7.8900E-01 1.7000E-02 2214300200054 8.5000E+01 3.5000E+01 1.8200E-01 1.9000E-02 2214300200055 8.6000E+01 3.3000E+01 6.0000E-03 1.0000E-02 2214300200056 8.6000E+01 3.4000E+01 6.1500E-01 1.7000E-02 2214300200057 8.6000E+01 3.5000E+01 3.1000E-01 1.6000E-02 2214300200058 8.6000E+01 3.6000E+01 6.9000E-02 1.1000E-02 2214300200059 8.7000E+01 3.4000E+01 1.9400E-01 1.1000E-02 2214300200060 8.7000E+01 3.5000E+01 4.8000E-01 1.9000E-02 2214300200061 8.7000E+01 3.6000E+01 3.2600E-01 1.9000E-02 2214300200062 8.8000E+01 3.4000E+01 3.2000E-02 1.0000E-02 2214300200063 8.8000E+01 3.5000E+01 2.9200E-01 1.8000E-02 2214300200064 8.8000E+01 3.6000E+01 6.3300E-01 2.1000E-02 2214300200065 8.8000E+01 3.7000E+01 4.4000E-02 2.2000E-02 2214300200066 8.9000E+01 3.4000E+01 1.1000E-02 1.0000E-02 2214300200067 8.9000E+01 3.5000E+01 1.3400E-01 1.3000E-02 2214300200068 8.9000E+01 3.6000E+01 7.9600E-01 2.4000E-02 2214300200069 8.9000E+01 3.7000E+01 5.9000E-02 1.2000E-02 2214300200070 9.0000E+01 3.5000E+01 3.7000E-02 3.2000E-02 2214300200071 9.0000E+01 3.6000E+01 7.4700E-01 1.8000E-02 2214300200072 9.0000E+01 3.7000E+01 2.1000E-01 2.6000E-02 2214300200073 9.0000E+01 3.8000E+01 6.0000E-03 1.0000E-02 2214300200074 9.1000E+01 3.5000E+01 2.2000E-02 1.2000E-02 2214300200075 9.1000E+01 3.6000E+01 4.2400E-01 1.6000E-02 2214300200076 9.1000E+01 3.7000E+01 4.5600E-01 2.3000E-02 2214300200077 9.1000E+01 3.8000E+01 9.7000E-02 1.1000E-02 2214300200078 9.2000E+01 3.6000E+01 1.9500E-01 1.2000E-02 2214300200079 9.2000E+01 3.7000E+01 3.7300E-01 2.5000E-02 2214300200080 9.2000E+01 3.8000E+01 4.3100E-01 2.3000E-02 2214300200081 9.3000E+01 3.6000E+01 3.7000E-02 4.3000E-02 2214300200082 9.3000E+01 3.7000E+01 2.5100E-01 1.8000E-02 2214300200083 9.3000E+01 3.8000E+01 6.6500E-01 2.8000E-02 2214300200084 9.3000E+01 3.9000E+01 4.7000E-02 2.3000E-02 2214300200085 9.4000E+01 3.6000E+01 1.3000E-02 1.0000E-02 2214300200086 9.4000E+01 3.7000E+01 8.5000E-02 1.4000E-02 2214300200087 9.4000E+01 3.8000E+01 7.7700E-01 3.3000E-02 2214300200088 9.4000E+01 3.9000E+01 1.2500E-01 5.3000E-02 2214300200089 9.5000E+01 3.7000E+01 2.9000E-02 1.8000E-02 2214300200090 9.5000E+01 3.8000E+01 6.0100E-01 3.4000E-02 2214300200091 9.5000E+01 3.9000E+01 3.3800E-01 3.6000E-02 2214300200092 9.5000E+01 4.0000E+01 3.2000E-02 1.9000E-02 2214300200093 9.6000E+01 3.7000E+01 1.1000E-02 1.0000E-02 2214300200094 9.6000E+01 3.8000E+01 4.4700E-01 2.3000E-02 2214300200095 9.6000E+01 3.9000E+01 3.9800E-01 2.1000E-02 2214300200096 9.6000E+01 4.0000E+01 1.4400E-01 1.7000E-02 2214300200097 9.7000E+01 3.8000E+01 1.6000E-01 1.4000E-02 2214300200098 9.7000E+01 3.9000E+01 4.3100E-01 3.2000E-02 2214300200099 9.7000E+01 4.0000E+01 3.3500E-01 2.5000E-02 2214300200100 ENDDATA 74 0 2214300200101 ENDSUBENT 100 0 2214300299999 SUBENT 22143003 19910617 00002214300300001 BIB 4 14 2214300300002 REACTION (90-TH-229(N,F)MASS,CHN,FY,,MXW/REL) PRE-DELAYED 2214300300003 NEUTRON MASS CHAIN YIELDS NORMALISED TO A TOTAL OF 1002214300300004 ANALYSIS .THE YIELDS Y(A,Q,E) AS MEASURED BY THE IONISATION 2214300300005 CHAMBER MUST BE SUMMED OVER ALL IONIC CHARGE STATES 2214300300006 AT THE DIFFERENT KINETIC ENERGIES, WITH UNMEASURED 2214300300007 CHARGE STATES BEING INTERPOLATED BY FITTING GAUSSIAN 2214300300008 SHAPES TO THE MEASURED YIELDS. THE MASS DISTRIBUTION 2214300300009 Y(A) IS THEN OBTAINED BY INTEGRATING OVER KINETIC 2214300300010 ENERGY BY MEANS OF A GAUSSIAN FIT. 2214300300011 STATUS .DATA TAKEN FROM MAIN REFERENCE. 2214300300012 HISTORY (900817C) S.W. 2214300300013 (900917E) 2214300300014 (910124A) S.W. REACTION MODIFIED 2214300300015 (910205E) 2214300300016 ENDBIB 14 0 2214300300017 NOCOMMON 0 0 2214300300018 DATA 3 23 2214300300019 MASS DATA DATA-ERR 2214300300020 NO-DIM ARB-UNITS ARB-UNITS 2214300300021 7.8000E+01 1.1000E-01 5.0000E-02 2214300300022 7.9000E+01 3.5000E-01 5.0000E-02 2214300300023 8.0000E+01 1.6600E+00 7.0000E-02 2214300300024 8.1000E+01 2.3300E+00 8.0000E-02 2214300300025 8.2000E+01 3.2900E+00 1.0000E-01 2214300300026 8.3000E+01 5.4600E+00 1.7000E-01 2214300300027 8.4000E+01 9.4100E+00 2.3000E-01 2214300300028 8.5000E+01 9.7500E+00 2.8000E-01 2214300300029 8.6000E+01 7.7000E+00 2.1000E-01 2214300300030 8.7000E+01 7.7100E+00 2.3000E-01 2214300300031 8.8000E+01 8.7300E+00 3.2000E-01 2214300300032 8.9000E+01 9.1000E+00 2.8000E-01 2214300300033 9.0000E+01 8.2800E+00 3.8000E-01 2214300300034 9.1000E+01 6.1600E+00 2.0000E-01 2214300300035 9.2000E+01 5.4700E+00 2.0000E-01 2214300300036 9.3000E+01 5.2300E+00 3.1000E-01 2214300300037 9.4000E+01 3.9100E+00 2.5000E-01 2214300300038 9.5000E+01 2.4400E+00 1.4000E-01 2214300300039 9.6000E+01 1.4300E+00 5.0000E-02 2214300300040 9.7000E+01 7.8000E-01 5.0000E-02 2214300300041 9.8000E+01 3.8000E-01 5.0000E-02 2214300300042 9.9000E+01 1.8000E-01 5.0000E-02 2214300300043 1.0000E+02 1.4000E-01 5.0000E-02 2214300300044 ENDDATA 25 0 2214300300045 ENDSUBENT 44 0 2214300399999 SUBENT 22143004 19900917 00002214300400001 BIB 4 7 2214300400002 REACTION (90-TH-229(N,F)MASS,,ZP,,MXW) 2214300400003 COMMENT .THE VARIANCE OF THE NUCLEAR CHARGE DISTRIBUTION IS 2214300400004 PLOTTED IN THE MAIN REFERENCE AS A FUNCTION OF MOST 2214300400005 PROBABLE CHARGE FOR EACH MASS NUMBER. 2214300400006 STATUS .DATA TAKEN FROM MAIN REFERENCE. 2214300400007 HISTORY (900817C) S.W. 2214300400008 (900917E) 2214300400009 ENDBIB 7 0 2214300400010 NOCOMMON 0 0 2214300400011 DATA 2 20 2214300400012 MASS DATA 2214300400013 NO-DIM NO-DIM 2214300400014 78. 31.73 2214300400015 79. 31.86 2214300400016 80. 32.01 2214300400017 81. 32.29 2214300400018 82. 32.95 2214300400019 83. 33.63 2214300400020 84. 33.95 2214300400021 85. 34.15 2214300400022 86. 34.44 2214300400023 87. 35.13 2214300400024 88. 35.69 2214300400025 89. 35.90 2214300400026 90. 36.18 2214300400027 91. 36.63 2214300400028 92. 37.24 2214300400029 93. 37.73 2214300400030 94. 38.01 2214300400031 95. 38.37 2214300400032 96. 38.68 2214300400033 97. 39.32 2214300400034 ENDDATA 22 0 2214300400035 ENDSUBENT 34 0 2214300499999 SUBENT 22143005 19900917 00002214300500001 BIB 3 5 2214300500002 REACTION (90-TH-229(N,F)ELEM,CHG,FY,,MXW/REL) ELEMENT YIELDS 2214300500003 NORMALISED TO A TOTAL OF 100. 2214300500004 STATUS .DATA TAKEN FROM MAIN REFERENCE. 2214300500005 HISTORY (900817C) S.W. 2214300500006 (900917E) 2214300500007 ENDBIB 5 0 2214300500008 NOCOMMON 0 0 2214300500009 DATA 3 10 2214300500010 ELEMENT DATA DATA-ERR 2214300500011 NO-DIM ARB-UNITS ARB-UNITS 2214300500012 31. 0.2 0.1 2214300500013 32. 4.9 0.2 2214300500014 33. 4.8 0.2 2214300500015 34. 26.9 0.3 2214300500016 35. 12.6 0.4 2214300500017 36. 26.0 0.4 2214300500018 37. 9.2 0.4 2214300500019 38. 11.8 0.3 2214300500020 39. 2.6 0.2 2214300500021 40. 1.0 0.2 2214300500022 ENDDATA 12 0 2214300500023 ENDSUBENT 22 0 2214300599999 ENDENTRY 5 0 2214399999999