ENTRY 22126 19891211 00002212600000001 SUBENT 22126001 19891211 00002212600100001 BIB 15 69 2212600100002 REFERENCE (J,NST,25,757,8810) 2212600100003 TITLE -NEUTRON RESONANCE PARAMETERS OF BA-135, BA-137 AND 2212600100004 BA-138. 2212600100005 AUTHOR (M.MIZUMOTO) 2212600100006 INSTITUTE (2JPNJAE) 2212600100007 FACILITY (LINAC) THE 120 MEV JAERI LINAC, OPERATED WITH 300 2212600100008 PULSES/SECOND WITH A PULSE WIDTH OF 30 NS AND A PEAK 2212600100009 CURRENT OF 3.5 AMPERE, WAS USED FOR THE MEASUREMENTS. 2212600100010 INC-SOURCE .120 MEV ELECTRONS ON A LAMINATED WATER-COOLED TANTALUM2212600100011 TARGET. THE NEUTRON BEAM WAS MODERATED BY A 5 CM THICK2212600100012 BORON LOADED POLYETHYLENE PLATE. THE TARGET WAS SHIEL-2212600100013 DED BY A LEAD AND COPPER SHADOW BAR OF 4 CM BY 6 CM 2212600100014 AREA AND 60 CM LONG TO REDUCE THE DIRECT GAMMA-FLASH. 2212600100015 INC-SPECT .WHITE SPECTRUM. A 5 CM BORON-NITRIDE FILTER WAS USED 2212600100016 ELIMINATE LOW ENERGY NEUTRONS IN THE 56.32 M MEASURE- 2212600100017 MENT, WHILE A 6 MM BORAL FILTER WAS USED IN THE 191.492212600100018 M MEASUREMENT. IN THE LATTER CASE, THE NEUTRON BEAM 2212600100019 WAS COLLIMATED TO 3.5 CM AT A DISTANCE OF 100 FROM THE2212600100020 TARGET. 2212600100021 METHOD (TOF ) TIME-OF-FLIGHT TRANSMISSION MEASUREMENTS WITH 2212600100022 A FLIGHT PATH OF 56.32 M FOR ENERGIES BELOW 2 KEV AND 2212600100023 A FLIGHT PATH OF 191.49 M FOR ENERGIES ABOVE 2 KEV. 2212600100024 THE FLIGHT PATH WAS EVACUATED, USING IN THE FIRST CASE2212600100025 THIN MYLAR WINDOWS AND IN THE SECOND CASE ALUMINUM 2212600100026 WINDOWS WITH A TOTAL THICKNESS OF 5.5 MM. 2212600100027 .THE ENERGY CALIBRATION WAS MADE USING THE 5.9035 KEV 2212600100028 RESONANCE IN AL AND THE 3.360 KEV AND 71.191 KEV 2212600100029 RESONANCES IN PB. 2212600100030 DETECTOR (GLASD) A 11.1 CM DIAMETER BY 0.635 CM THICK 6-LITHIUM-2212600100031 GLASS DETECTOR WAS USED AT THE 56.32 M MEASUREMENT. 2212600100032 .FIVE 11.1 CM DIAMETER BY 1.27 CM THICK 6-LITHIUM-GLASS2212600100033 DETECTORS WERE USED AT THE 191.49 M MEASUREMENT. 2212600100034 .AN ADDITIONAL 5 CM DIAMETER BY 0.635 CM THICK 2212600100035 6-LITHIUM-GLASS DETECTOR AT A 47 M STATION WAS USED 2212600100036 FOR MONITORING THE NEUTRON INTENSITIES. 2212600100037 SAMPLE .ENRICHED SAMPLES OF 135-BA, 137-BA AND 138-BA IN THE 2212600100038 FORM OF CARBONATE OR NITRATE POWDER WERE USED. EACH 2212600100039 SAMPLE WAS CONTAINED IN A 4 CM DIAMETER BY 1 CM THICK 2212600100040 ALUMINUM CASE WITH 0.2 CM ALUMINUM WINDOWS. THE ISO- 2212600100041 TOPIC ABUNDANCES AND THICKNESSES OF THE SAMPLES ARE 2212600100042 LISTED BELOW. 2212600100043 . 2212600100044 ------------------------------------------------------2212600100045 ISOTOPE ABUNDANCE, PERCENT 2212600100046 135-BA 137-BA 138-BA 2212600100047 ------------------------------------------------------2212600100048 130-BA L.T. 0.05 L.T. 0.03 L.T. 0.01 2212600100049 132-BA L.T. 0.05 L.T. 0.03 L.T. 0.01 2212600100050 134-BA 2.41 L.T. 0.05 L.T. 0.01 2212600100051 135-BA 79.04 L.T. 0.1 L.T. 0.02 2212600100052 136-BA 9.35 0.63 0.03 2212600100053 137-BA 2.91 81.9 0.25 2212600100054 138-BA 6.29 17.4 99.67 2212600100055 ------------------------------------------------------2212600100056 THICKNESS, 2212600100057 ATOMS/BARN 0.0066 0.0064 0.125 2212600100058 ------------------------------------------------------2212600100059 . 2212600100060 CORRECTION .THE RAW DATA WERE CORRECTED FOR DEAD-TIME LOSSES AND 2212600100061 FOR BACKGROUND. THE BACKGROUND WAS DETERMINED BY USING2212600100062 BLACK RESONANCE FILTERS CONSISTING OF NA, AL AND CO. 2212600100063 ERR-ANALYS (DATA-ERR) THE ERRORS GIVEN INCLUDE ONLY STATISTICAL 2212600100064 AND FITTING ERRORS. THE SYSTEMATICAL ERRORS ARE ESTI- 2212600100065 MATED TO BE ABOUT 5 PERCENT. 2212600100066 ANALYSIS .THE TRANSMISSION DATA WERE ANALYZED WITH THE MULTI- 2212600100067 LEVEL BREIT-WIGNER FORMULA. 2212600100068 STATUS .DATA TAKEN FROM MAIN REF. 2212600100069 HISTORY (891022C) N.O. 2212600100070 (891211E) 2212600100071 ENDBIB 69 0 2212600100072 NOCOMMON 0 0 2212600100073 ENDSUBENT 72 0 2212600199999 SUBENT 22126002 19891211 00002212600200001 BIB 3 5 2212600200002 REACTION 1(56-BA-135(N,0),,EN) 2212600200003 2(56-BA-135(N,EL),,WID,,2G) 2212600200004 STATUS .DATA TAKEN FROM MAIN REF. 2212600200005 HISTORY (891022C) N.O. 2212600200006 (891211E) 2212600200007 ENDBIB 5 0 2212600200008 NOCOMMON 0 0 2212600200009 DATA 3 68 2212600200010 DATA 1DATA 2DATA-ERR 2 2212600200011 EV MILLI-EV MILLI-EV 2212600200012 4.0450E+02 6.2500E+02 6.0000E+00 2212600200013 4.3270E+02 2.1000E+01 2.0000E+00 2212600200014 4.6510E+02 8.9900E+01 1.9000E+00 2212600200015 6.5060E+02 1.2900E+02 2.9000E+00 2212600200016 6.6710E+02 2.0000E+01 4.0000E+00 2212600200017 7.2040E+02 8.5000E+01 2.9000E+00 2212600200018 8.2930E+02 5.9000E+01 4.0000E+00 2212600200019 8.7820E+02 1.2820E+03 1.9000E+01 2212600200020 8.8970E+02 3.2000E+01 6.0000E+00 2212600200021 9.3880E+02 3.2200E+02 1.1000E+01 2212600200022 1.0280E+03 2.2900E+02 1.0000E+01 2212600200023 1.0630E+03 6.5000E+01 8.0000E+00 2212600200024 1.1130E+03 5.2000E+01 8.0000E+00 2212600200025 1.1510E+03 1.7600E+02 1.1000E+01 2212600200026 1.1940E+03 9.9300E+02 2.0000E+01 2212600200027 1.2220E+03 4.2000E+01 1.0000E+01 2212600200028 1.2730E+03 3.1200E+02 1.6000E+01 2212600200029 1.3430E+03 5.2000E+01 1.0000E+01 2212600200030 1.3540E+03 5.5000E+01 1.1000E+01 2212600200031 1.3930E+03 6.2800E+02 2.1000E+01 2212600200032 1.4010E+03 3.2000E+02 1.6000E+01 2212600200033 1.5130E+03 4.9000E+01 1.3000E+01 2212600200034 1.6160E+03 5.7500E+02 2.4000E+01 2212600200035 1.6690E+03 7.4200E+02 2.8000E+01 2212600200036 1.6960E+03 1.6600E+02 1.9000E+01 2212600200037 1.7110E+03 1.4500E+03 4.0000E+01 2212600200038 1.7510E+03 7.9100E+02 3.1000E+01 2212600200039 1.8590E+03 1.7300E+02 2.3000E+01 2212600200040 1.9690E+03 1.4000E+02 2.3000E+01 2212600200041 1.9800E+03 1.8100E+02 2.3000E+01 2212600200042 1.9950E+03 4.7000E+02 5.0000E+01 2212600200043 2.0370E+03 9.4000E+01 2.3000E+01 2212600200044 2.0590E+03 2.7200E+02 2.7000E+01 2212600200045 2.1390E+03 1.8100E+02 2.8000E+01 2212600200046 2.2500E+03 1.2700E+02 3.0000E+01 2212600200047 2.2990E+03 2.6000E+02 4.0000E+01 2212600200048 2.3430E+03 7.2000E+02 7.0000E+01 2212600200049 2.3840E+03 1.1400E+03 6.0000E+01 2212600200050 2.4010E+03 6.2000E+02 5.0000E+01 2212600200051 2.4990E+03 3.9000E+02 5.0000E+01 2212600200052 2.5230E+03 2.0000E+02 4.0000E+01 2212600200053 2.5990E+03 5.4000E+02 5.0000E+01 2212600200054 2.6600E+03 2.2000E+02 5.0000E+01 2212600200055 2.6860E+03 1.1000E+03 7.0000E+01 2212600200056 2.8090E+03 2.7000E+02 6.0000E+01 2212600200057 2.8240E+03 7.3000E+02 6.0000E+01 2212600200058 2.9190E+03 1.3600E+03 8.0000E+01 2212600200059 2.9460E+03 1.2600E+03 7.0000E+01 2212600200060 2.9780E+03 1.3500E+03 8.0000E+01 2212600200061 3.0210E+03 2.7600E+03 1.0000E+02 2212600200062 3.2690E+03 2.2200E+03 1.2000E+02 2212600200063 3.3940E+03 2.2300E+03 1.2000E+02 2212600200064 3.4110E+03 4.8000E+02 9.0000E+01 2212600200065 3.4540E+03 1.3000E+03 1.1000E+02 2212600200066 3.4720E+03 7.4000E+02 1.0000E+02 2212600200067 3.5960E+03 1.3000E+03 1.2000E+02 2212600200068 3.7000E+03 4.1000E+02 1.1000E+02 2212600200069 3.7440E+03 4.2300E+03 1.7000E+02 2212600200070 3.8150E+03 2.1000E+03 1.4000E+02 2212600200071 3.8950E+03 4.3000E+02 1.2000E+02 2212600200072 3.9500E+03 2.3600E+03 1.6000E+02 2212600200073 3.9760E+03 2.9800E+03 1.6000E+02 2212600200074 4.0660E+03 1.2700E+03 2.6000E+02 2212600200075 4.0910E+03 1.0100E+03 2.6000E+02 2212600200076 4.3240E+03 4.9000E+03 4.0000E+02 2212600200077 4.4000E+03 6.2000E+02 2.3000E+02 2212600200078 4.4340E+03 2.1300E+03 3.3000E+02 2212600200079 4.6200E+03 3.5000E+03 4.0000E+02 2212600200080 ENDDATA 70 0 2212600200081 ENDSUBENT 80 0 2212600299999 SUBENT 22126003 19891211 00002212600300001 BIB 3 5 2212600300002 REACTION 1(56-BA-137(N,0),,EN) 2212600300003 2(56-BA-137(N,EL),,WID,,2G) 2212600300004 STATUS .DATA TAKEN FROM MAIN REF. 2212600300005 HISTORY (891022C) N.O. 2212600300006 (891211E) 2212600300007 ENDBIB 5 0 2212600300008 NOCOMMON 0 0 2212600300009 DATA 3 38 2212600300010 DATA 1DATA 2DATA-ERR 2 2212600300011 EV EV EV 2212600300012 4.1830E+02 8.1000E-01 6.0000E-03 2212600300013 5.7660E+02 3.6700E-01 4.0000E-03 2212600300014 1.0450E+03 6.1000E-02 5.0000E-03 2212600300015 1.1940E+03 3.0100E-01 7.0000E-03 2212600300016 1.3430E+03 1.2450E+00 1.6000E-02 2212600300017 1.7290E+03 6.4900E-01 1.4000E-02 2212600300018 2.3520E+03 4.5000E-01 2.0000E-02 2212600300019 2.4070E+03 2.3700E+00 4.0000E-02 2212600300020 2.6320E+03 1.1400E+00 3.0000E-02 2212600300021 2.6860E+03 4.3200E+00 5.0000E-02 2212600300022 3.1370E+03 1.2000E-01 2.0000E-02 2212600300023 3.3370E+03 1.1000E-01 3.0000E-02 2212600300024 3.8930E+03 5.1800E+00 9.0000E-02 2212600300025 4.2760E+03 2.7000E-01 4.0000E-02 2212600300026 4.5790E+03 9.0000E-01 6.0000E-02 2212600300027 4.7010E+03 3.2000E-01 5.0000E-02 2212600300028 4.9630E+03 7.6200E+00 1.4000E-01 2212600300029 5.0390E+03 2.1000E-01 5.0000E-02 2212600300030 5.2640E+03 1.2600E+00 8.0000E-02 2212600300031 5.7910E+03 3.3200E+00 1.4000E-01 2212600300032 5.8500E+03 1.5600E+00 1.2000E-01 2212600300033 6.0100E+03 1.2500E+00 1.0000E-01 2212600300034 6.4290E+03 3.3600E+00 1.5000E-01 2212600300035 6.9870E+03 2.2400E+00 1.5000E-01 2212600300036 7.8570E+03 1.8500E+00 1.9000E-01 2212600300037 7.9740E+03 4.9500E+00 2.6000E-01 2212600300038 8.5620E+03 1.4800E+01 5.0000E-01 2212600300039 9.4170E+03 1.4600E+00 2.4000E-01 2212600300040 1.0079E+04 3.6000E+00 4.0000E-01 2212600300041 1.0261E+04 2.6000E+00 4.0000E-01 2212600300042 1.0535E+04 1.7100E+01 7.0000E-01 2212600300043 1.0613E+04 5.3000E+00 4.0000E-01 2212600300044 1.0931E+04 1.2500E+01 6.0000E-01 2212600300045 1.1856E+04 1.7000E+00 4.0000E-01 2212600300046 1.2343E+04 2.4000E+00 5.0000E-01 2212600300047 1.3574E+04 3.8000E+00 6.0000E-01 2212600300048 1.4504E+04 4.3000E+00 6.0000E-01 2212600300049 1.4941E+04 5.9000E+00 8.0000E-01 2212600300050 ENDDATA 40 0 2212600300051 ENDSUBENT 50 0 2212600399999 SUBENT 22126004 19891211 00002212600400001 BIB 3 5 2212600400002 REACTION 1(56-BA-138(N,0),,EN) 2212600400003 2(56-BA-138(N,EL),,WID,,2G) 2212600400004 STATUS .DATA TAKEN FROM MAIN REF. 2212600400005 HISTORY (891022C) N.O. 2212600400006 (891211E) 2212600400007 ENDBIB 5 0 2212600400008 NOCOMMON 0 0 2212600400009 DATA 3 12 2212600400010 DATA 1DATA 2DATA-ERR 2 2212600400011 KEV EV EV 2212600400012 6.4800E-01 5.0000E-03 4.0000E-04 2212600400013 1.9480E+00 1.0100E-01 8.0000E-03 2212600400014 4.7040E+00 8.1000E-01 6.0000E-02 2212600400015 7.8640E+00 5.1200E+00 1.7000E-01 2212600400016 1.5160E+01 3.4000E+00 1.6000E+00 2212600400017 2.4280E+01 5.0000E+00 3.0000E+00 2212600400018 3.0890E+01 1.9900E+02 8.0000E+00 2212600400019 4.0320E+01 6.8000E+01 1.8000E+01 2212600400020 5.0560E+01 2.5000E+02 2.0000E+01 2212600400021 5.5260E+01 7.5000E+01 1.8000E+01 2212600400022 5.9650E+01 1.0100E+02 2.2000E+01 2212600400023 6.3120E+01 1.1700E+02 3.5000E+01 2212600400024 ENDDATA 14 0 2212600400025 ENDSUBENT 24 0 2212600499999 SUBENT 22126005 19891211 00002212600500001 BIB 3 4 2212600500002 REACTION (56-BA-135(N,EL),,STF) 2212600500003 STATUS .DATA TAKEN FROM MAIN REF. 2212600500004 HISTORY (891022C) N.O. 2212600500005 (891211E) 2212600500006 ENDBIB 4 0 2212600500007 NOCOMMON 0 0 2212600500008 DATA 5 1 2212600500009 EN-MIN EN-MAX MOMENTUM L DATA DATA-ERR 2212600500010 KEV KEV NO-DIM NO-DIM NO-DIM 2212600500011 4.0000E-01 4.6000E+00 0.0000E+00 1.3300E-04 2.2000E-05 2212600500012 ENDDATA 3 0 2212600500013 ENDSUBENT 12 0 2212600599999 SUBENT 22126006 19891211 00002212600600001 BIB 3 4 2212600600002 REACTION (56-BA-137(N,EL),,STF) 2212600600003 STATUS .DATA TAKEN FROM MAIN REF. 2212600600004 HISTORY (891022C) N.O. 2212600600005 (891211E) 2212600600006 ENDBIB 4 0 2212600600007 NOCOMMON 0 0 2212600600008 DATA 5 1 2212600600009 EN-MIN EN-MAX MOMENTUM L DATA DATA-ERR 2212600600010 KEV KEV NO-DIM NO-DIM NO-DIM 2212600600011 4.0000E-01 1.5000E+01 0.0000E+00 5.1000E-05 1.2000E-05 2212600600012 ENDDATA 3 0 2212600600013 ENDSUBENT 12 0 2212600699999 SUBENT 22126007 19891211 00002212600700001 BIB 3 4 2212600700002 REACTION (56-BA-135(N,0),,D) 2212600700003 STATUS .DATA TAKEN FROM MAIN REF. 2212600700004 HISTORY (891022C) N.O. 2212600700005 (891211E) 2212600700006 ENDBIB 4 0 2212600700007 NOCOMMON 0 0 2212600700008 DATA 5 1 2212600700009 EN-MIN EN-MAX MOMENTUM L DATA DATA-ERR 2212600700010 KEV KEV NO-DIM EV EV 2212600700011 4.0000E-01 4.6000E+00 0.0000E+00 4.1000E+01 3.0000E+00 2212600700012 ENDDATA 3 0 2212600700013 ENDSUBENT 12 0 2212600799999 SUBENT 22126008 19891211 00002212600800001 BIB 3 4 2212600800002 REACTION (56-BA-137(N,0),,D) 2212600800003 STATUS .DATA TAKEN FROM MAIN REF. 2212600800004 HISTORY (891022C) N.O. 2212600800005 (891211E) 2212600800006 ENDBIB 4 0 2212600800007 NOCOMMON 0 0 2212600800008 DATA 5 1 2212600800009 EN-MIN EN-MAX MOMENTUM L DATA DATA-ERR 2212600800010 KEV KEV NO-DIM EV EV 2212600800011 4.0000E-01 1.5000E+01 0.0000E+00 2.7000E+02 2.8000E+01 2212600800012 ENDDATA 3 0 2212600800013 ENDSUBENT 12 0 2212600899999 ENDENTRY 8 0 2212699999999