ENTRY 21872 19840416 00002187200000001 SUBENT 21872001 19840416 00002187200100001 BIB 14 32 2187200100002 INSTITUTE (2JPNJAE) 2187200100003 (2JPNKYU) N.OHNISHI,Y.KANDA 2187200100004 REFERENCE (J,NST,20,183,83) 2187200100005 AUTHOR (Y.NAKAJIMA, N.OHNISHI, Y.KANDA, M.MIZUMOTO, 2187200100006 Y.KAWARASAKI, Y.FURUTA, A.ASAMI) 2187200100007 TITLE -.RADIATIVE NEUTRON CAPTURE IN LA-139 2187200100008 BELOW 2.5 KEV.- 2187200100009 FACILITY (LINAC,2JPNJAE) ELECTRON LINAC, OPERATED AT 140 MEV, 2187200100010 PULSE WIDTH 30 NS. 2187200100011 INC-SOURCE (PHOTO) 2187200100012 SAMPLE .LA(2)-O(3), PURITY 99.99 PER CENT, INCAPSULATED 2187200100013 IN A 0.1 MM THICK AL CASE, DIAMETER AND THICKNESS 2187200100014 WERE 6 CM AND 0.0117 ATOMS/BARN,RESPECTIVELY. 2187200100015 METHOD (TOF ) 52 M TIME-OF-FLIGHT FACILITY 2187200100016 .IRRADIATION OF SAMPLE IN THE CENTER OF THE 2187200100017 CAPTURE GAMMA DETECTOR 2187200100018 .CAPTURE CROSS SECTIONS WERE MEASURED IN THE 2187200100019 ENERGY REGION OF 70 TO 2540 EV 2187200100020 DETECTOR (STANK) 3500 L LIQUID SCINTILLATOR TANK 2187200100021 (GLASD) LI-6 GLASS SCINTILLATOR FOR N-FLUX 2187200100022 CORRECTION .FOR MULTIPLE SCATTERING 2187200100023 ERR-ANALYS (ERR-S) STATISTICAL ERROR 2187200100024 (ERR-1) SYSTEMATIC ERROR, DERIVED FROM UNCERTAINTIES 2187200100025 OF THE NORMALIZATION (APPROX. 5 PER CENT ) AND OF 2187200100026 THE N-WIDTH VALUES. 2187200100027 .OTHER ERRORS WERE NEGLIGIBLE 2187200100028 ADD-RES (COMP ) STATISTICAL MODEL CALCULATIONS 2187200100029 STATUS .MAIN REFERENCE, TABLE 1. 2187200100030 HISTORY (830802C) BN. 2187200100031 (831004E) 2187200100032 (840106U) A.P.T. JAPAN CODE CHANGED TO JPN 2187200100033 (840106E) 2187200100034 ENDBIB 32 0 2187200100035 NOCOMMON 0 0 2187200100036 ENDSUBENT 35 0 2187200199999 SUBENT 21872002 19831004 00002187200200001 BIB 6 30 2187200200002 REACTION 1(57-LA-139(N,0),,EN) 2187200200003 2(57-LA-139(N,G),,ARE,,FCT) 2187200200004 .THE FACTOR IS 1/( 2 * (PI**2) * (LAMBDA**2) ) 2187200200005 3(57-LA-139(N,G),,WID) 2187200200006 ANALYSIS .DATA WERE NORMALIZED TO THE 72.3 EV RESONANCE 2187200200007 LEVEL, BY ANALYZING THE TRANSMISSION DATA USING 2187200200008 A MODIFIED VERSION OF THE ATTA-HARVEY CODE 2187200200009 (S.E.ATTA AND J.A.HARVEY,ORNL-3205(1961) , 2187200200010 A.TACHIBANA ET AL.,JAERI-MEMO 3728(1969) ) 2187200200011 IN COMBINATION WITH PUBLISHED RESONANCE 2187200200012 PARAMETERS OF HACKEN ET AL.,EXFOR 10579, AND 2187200200013 SHWE ET AL.,EXFOR 12065. THE USED VALUES WERE 2187200200014 G * N-WIDTH = 15.05 MILLI-EV 2187200200015 J = 3. 2187200200016 (AREA ) AREA ANALYSIS USING FOR THE N-WIDTHS 2187200200017 THE VALUES OF HACKEN ET AL.(EXFOR 10579), 2187200200018 AND VARYING THE GAMMA-WIDTH VALUES BY 2187200200019 MEANS OF THE MONTE CARLO CODE TACASI. 2187200200020 ASSUMED (ASSUM,57-LA-139(N,EL),,WID,,G) 2187200200021 .NEUTRON WIDTHS TAKEN FROM HACKEN ET AL., 2187200200022 PHYS.REV.,C13,1884(1976). 2187200200023 FLAG (1.) FOR THIS RESONANCE ENERGY VALUES 2187200200024 OF 2 * G * GAMMA-WIDTH ARE GIVEN. 2187200200025 (2.) THESE LEVELS ARE BELIEVED LIKELY TO BE 2187200200026 P-WAVE LEVELS ON THE BASIS OF A BAYES' 2187200200027 THEOREM ANALYSIS MENTIONED IN THE WORK 2187200200028 OF HACKEN ET AL. 2187200200029 STATUS .MAIN REFERENCE, TABLE 1. 2187200200030 HISTORY (830802C) 2187200200031 (831004E) 2187200200032 ENDBIB 30 0 2187200200033 NOCOMMON 0 0 2187200200034 DATA 10 21 2187200200035 DATA 1DATA 2ERR-S 2ERR-1 2DATA 3ERR-S 32187200200036 ERR-1 3ASSUM ASSUM-ERR FLAG 2187200200037 EV MILLI-EV MILLI-EV MILLI-EV MILLI-EV MILLI-EV 2187200200038 MILLI-EV MILLI-EV MILLI-EV NO-DIM 2187200200039 7.2300E+01 9.2000E+00 2.0000E-01 6.0000E-01 5.2600E+01 1.9000E+002187200200040 5.0000E+00 1.5100E+01 1.0000E+00 2187200200041 6.1720E+02 8.0000E+00 2.0000E-01 4.0000E-01 2187200200042 1.4900E+01 7.0000E-01 2187200200043 7.0250E+02 2.6000E+00 1.0000E-01 1.0000E-01 2187200200044 4.0000E+00 5.0000E-01 2.0000E+00 2187200200045 8.7540E+02 6.1000E+00 2.0000E-01 3.0000E-01 2187200200046 1.1500E+01 1.5000E+00 2187200200047 9.0500E+02 2.6000E+00 1.0000E-01 1.0000E-01 2187200200048 3.6000E+00 3.3000E+00 2.0000E+00 2187200200049 9.6290E+02 5.2000E+00 1.0000E-01 2.0000E-01 2187200200050 8.7000E+00 6.0000E-01 2187200200051 1.1794E+03 2.1600E+01 1.0000E+00 1.3000E+00 5.0600E+01 2.4000E+002187200200052 2.4000E+00 9.2400E+02 3.4000E+01 2187200200053 1.2084E+03 4.3000E+00 1.0000E-01 1.0000E-01 2187200200054 7.0000E+00 1.4000E+00 2.0000E+00 2187200200055 1.2563E+03 5.5000E+00 2.0000E-01 2.0000E-01 2187200200056 1.1000E+01 1.8000E+00 2.0000E+00 2187200200057 1.4260E+03 1.2000E+00 1.0000E-01 1.0000E-01 2187200200058 1.5000E+00 4.0000E-01 2.0000E+00 2187200200059 1.4328E+03 2.1000E+00 1.0000E-01 1.0000E-01 2187200200060 2.7000E+00 8.0000E-01 2.0000E+00 2187200200061 1.6369E+03 7.3000E+00 4.0000E-01 4.0000E-01 2187200200062 1.4000E+01 2.0000E+00 2.0000E+00 2187200200063 1.6514E+03 4.6000E+00 3.0000E-01 2.0000E-01 2187200200064 8.5000E+00 1.2000E+00 2.0000E+00 2187200200065 1.8280E+03 2.1000E+00 2.0000E-01 1.0000E-01 2187200200066 3.4000E+00 9.0000E-01 2.0000E+00 2187200200067 1.9159E+03 4.1000E+00 4.0000E-01 2.0000E-01 2187200200068 6.1000E+00 2.0000E+00 2.0000E+00 2187200200069 1.9714E+03 2.5000E+00 3.0000E-01 1.0000E-01 2187200200070 4.4000E+00 9.0000E-01 2.0000E+00 2187200200071 2.1159E+03 3.0900E+01 1.8000E+00 1.8000E+00 7.1900E+01 4.3000E+002187200200072 4.3000E+00 1.7000E+03 1.8000E+02 2187200200073 2.1516E+03 3.1800E+01 2.1000E+00 2.1000E+00 6.0500E+01 4.3000E+002187200200074 4.3000E+00 4.8200E+02 3.2000E+01 2187200200075 2.1760E+03 5.7000E+00 5.0000E-01 3.0000E-01 2187200200076 9.8000E+00 9.0000E-01 2.0000E+00 2187200200077 2.3809E+03 1.3200E+01 1.4000E+00 7.0000E-01 4.3200E+01 7.5000E+002187200200078 4.0000E+00 3.4000E+01 2.0000E+00 1.0000E+00 2187200200079 2.4646E+03 2.5600E+01 3.4000E+00 1.5000E+00 5.3900E+01 7.5000E+002187200200080 3.4000E+00 5.1200E+02 7.5000E+01 1.0000E+00 2187200200081 ENDDATA 46 0 2187200200082 ENDSUBENT 81 0 2187200299999 ENDENTRY 2 0 2187299999999