ENTRY 30666 20090830 31403066600000001 SUBENT 30666001 20090830 31403066600100001 BIB 10 23 3066600100002 INSTITUTE (3CHFTHU) 3066600100003 REFERENCE (J,PR/C,24,523,198108) 3066600100004 AUTHOR (S.S.Hsu,J.T.Lin,C.M.Yang,Y.M.Yu) 3066600100005 TITLE Yields and isomeric ratio of xenon and krypton isotopes3066600100006 from thermal neutron fission of U-235. 3066600100007 FACILITY (REAC,3CHFTHU). Open pool type,operated at 1 MW. 3066600100008 INC-SPECT Thermal neutron flux of about 2.x10**12 n/s/cm2 3066600100009 Irradiation time 2 to 60 min depending on half-life of 3066600100010 product measured. 3066600100011 SAMPLE 40 mg metal chip of natural uranium, 3066600100012 cleaned with 6N HNO3 and various solvent, vacuum dried,3066600100013 sealed in a quartz tube capsule. 3066600100014 METHOD Chemical dissolution of sample 3066600100015 Constant flow of carrier gas for volatile products 3066600100016 Removal of I,Br,moisture and acid fumes 3066600100017 Kr,Xe trapped on charcoal at liquid N temperature 3066600100018 DETECTOR (GELI). Together with a 4096 channel analyzer and a 3066600100019 HP-2100 data acquisition system. 3066600100020 Efficiency calibration with standard sources from NBS 3066600100021 and New England Nuclear. No further information on 3066600100022 sources and calibration data is given. 3066600100023 HISTORY (19831201C) ML. 3066600100024 (20090725A) SD:Updated to new date formats,lower case. 3066600100025 ENDBIB 23 0 3066600100026 COMMON 1 3 3066600100027 EN-DUMMY 3066600100028 EV 3066600100029 2.5300E-02 3066600100030 ENDCOMMON 3 0 3066600100031 ENDSUBENT 30 0 3066600199999 SUBENT 30666002 20090830 31403066600200001 BIB 9 57 3066600200002 REACTION C(92-U-235(N,F)ELEM/MASS,CUM,FY,,MXW) 3066600200003 I(92-U-235(N,F)ELEM/MASS,IND,FY,,MXW) 3066600200004 ANALYSIS The collection efficiency for Kr and Xe were checked by3066600200005 measuring the activities of I-135 and Xe-135 (trapped 3066600200006 in different columns) and was found almost 100%. 3066600200007 Gamma spectra were analysed and fission yields 3066600200008 calculated from genetic relationships in beta-decay 3066600200009 mass chains using relevant decay data. 3066600200010 DECAY-DATA Precursor data for Kr isotopes are neglected 3066600200011 ((1.)36-KR-85-M,4.48HR,DG,151.,0.78) 3066600200012 ((2.)36-KR-87,76.MIN,DG,403.,0.50) 3066600200013 ((3.)36-KR-88,2.84HR,DG,196.,0.26) 3066600200014 A=133. TE-133-G and I-133-M ignored. Data for genetic 3066600200015 relationships were taken from S.Spirodon, J.Inorg. 3066600200016 Nucl.Chem 35(1973)713. 3066600200017 ((4.)52-TE-133-M,55.4MIN,B-,,1.0) 3066600200018 100% decay to I-133-G assumed 3066600200019 ((4.)53-I-133-G,20.8HR) Branching to Xe-133-m = 0.024 3066600200020 to Xe-133-g = 0.975 3066600200021 ((4.)54-XE-133-M,2.19D,DG,233.,0.14) 3066600200022 ((4.)54-XE-133-G,5.29D,DG,81.,0.37) 3066600200023 A=135. Data for genetic relationships were taken from 3066600200024 H.Fenerstein,J.Oschinski, Inorg.Nucl.Chem.Lett. 12.3066600200025 (1976)243. 3066600200026 ((5.)53-I-135,6.7HR) Branching to Xe-135-m = 0.155 3066600200027 to Xe-135-m = 0.845 3066600200028 ((5.)54-XE-135-M,15.7MIN,DG,527.,0.80) 3066600200029 Internal transition to Xe-135-g given as 0.75 (see 3066600200030 Compiler's Comment) 3066600200031 ((5.)54-XE-135-G,9.14HR,DG,250.,0.92) 3066600200032 Compiler's comment: The internal transition of 0.75 for3066600200033 Xe-135-m contradicts the gamma-ray abundance of 0.80. 3066600200034 MONITOR (92-U-235(N,F)36-KR-85-M,CUM,FY,,MXW) 3066600200035 taken from M.E.Meek and B.F.Rider, NEDO-12154 (1972) 3066600200036 MISC-COL (MISC) Number of determinations 3066600200037 FLAG (1.) Reference yield value. 3066600200038 (2.) Cumulative yield of both isomers together. 3066600200039 STATUS (TABLE) Data taken from Table 2 of first reference. 3066600200040 CORRECTION Chemical yield, counting geometry and neutron flux were3066600200041 regarded as common factors and no corrections applied. 3066600200042 Corrections were applied for detector efficiency and 3066600200043 for decay. 3066600200044 For mass chains 133 and 135 the growth and decay of 3066600200045 precursors was also considered. 3066600200046 Compiler's comment: It is assumed that the authors' 3066600200047 statement 'Since the time elapsed from the end of 3066600200048 irradiation to the time of target dissolution is 15 min3066600200049 or longer, no decay correction for Kr85m is necessary' 3066600200050 refers to its precursors. 3066600200051 ERR-ANALYS (DATA-ERR) Quoted uncertainties are one standard 3066600200052 deviation based on the agreement between replicates. 3066600200053 The uncertainty for the reference fission yield of 3066600200054 Kr-85-m is 12% relative, but not included in 3066600200055 the error given in the data Table. 3066600200056 Compilers comment: No information is given whether the3066600200057 uncertainties of corrections (efficiency,decay) is 3066600200058 included in the quoted errors. 3066600200059 ENDBIB 57 0 3066600200060 COMMON 1 3 3066600200061 MONIT 3066600200062 PC/FIS 3066600200063 1.3300E+00 3066600200064 ENDCOMMON 3 0 3066600200065 DATA 11 9 3066600200066 ELEMENT MASS ISOMER DATA CDATA-ERR CMISC C3066600200067 DATA IDATA-ERR IMISC IDECAY-FLAG FLAG 3066600200068 NO-DIM NO-DIM NO-DIM PC/FIS PC/FIS NO-DIM 3066600200069 PC/FIS PC/FIS NO-DIM NO-DIM NO-DIM 3066600200070 3.6000E+01 8.5000E+01 1.0000E+00 1.3300E+00 5.0000E+003066600200071 1.0000E+00 1.0000E+00 3066600200072 3.6000E+01 8.7000E+01 3.3900E+00 4.2000E-01 5.0000E+003066600200073 2.0000E+00 3066600200074 3.6000E+01 8.8000E+01 3.7400E+00 4.5000E-01 5.0000E+003066600200075 3.0000E+00 3066600200076 5.4000E+01 1.3300E+02 1.0000E+00 3066600200077 1.2000E-01 6.0000E-02 2.0000E+00 4.0000E+00 3066600200078 5.4000E+01 1.3300E+02 0.0000E+00 3066600200079 3.4000E-01 1.8000E-01 2.0000E+00 4.0000E+00 3066600200080 5.4000E+01 1.3300E+02 7.2100E+00 8.5000E-01 2.0000E+003066600200081 4.0000E+00 2.0000E+00 3066600200082 5.4000E+01 1.3500E+02 1.0000E+00 1.0100E+00 1.5000E-01 3.0000E+003066600200083 3.4000E-02 1.0000E-02 3.0000E+00 5.0000E+00 3066600200084 5.4000E+01 1.3500E+02 0.0000E+00 3066600200085 7.5000E-01 1.2000E-01 3.0000E+00 5.0000E+00 3066600200086 5.4000E+01 1.3500E+02 7.0700E+00 8.5000E-01 3.0000E+003066600200087 5.0000E+00 2.0000E+00 3066600200088 ENDDATA 22 0 3066600200089 ENDSUBENT 88 0 3066600299999 SUBENT 30666003 20090830 31403066600300001 BIB 3 9 3066600300002 REACTION 3(92-U-235(N,F)54-XE-133-M/G,IND,FY/RAT,,MXW) 3066600300003 5(92-U-235(N,F)54-XE-135-M/G,IND,FY/RAT,,MXW) 3066600300004 Independent yield ratio of the high to the low spin 3066600300005 isomer 3066600300006 COMMENT For both Xe-133 and Xe-135 the spin and parity for 3066600300007 the metastable state is 11/2-, 3066600300008 the ground state is 3/2+. 3066600300009 STATUS (DEP,30666002) Ratio of independent yield given 3066600300010 (TABLE) data taken from Table 3 of first reference 3066600300011 ENDBIB 9 0 3066600300012 NOCOMMON 0 0 3066600300013 DATA 4 1 3066600300014 DATA 3DATA-ERR 3DATA 5DATA-ERR 5 3066600300015 NO-DIM NO-DIM NO-DIM NO-DIM 3066600300016 3.5000E-01 1.9000E-01 4.5000E-02 1.2000E-02 3066600300017 ENDDATA 3 0 3066600300018 ENDSUBENT 17 0 3066600399999 ENDENTRY 3 0 3066699999999