ENTRY 23082 20091102 22162308200000001 SUBENT 23082001 20091102 22162308200100001 BIB 13 61 2308200100002 TITLE .High Resolution Measurement of the 234U(n,f) Cross 2308200100003 Section in the Neutron Energy Range from 0.5 eV 2308200100004 to 100 keV 2308200100005 AUTHOR (K.Heyse, C.Wagemans, L.De Smet, O.Serot, J.Wagemans, 2308200100006 J.Van Gils) 2308200100007 INSTITUTE (2ZZZGEL) European Communities, Joint Research Centre,2308200100008 Institute for Reference Materials and Measurements, 2308200100009 Geel, Belgium. J.Heyse. 2308200100010 (2BLGGHT) Ghent University, Department of Subatomic 2308200100011 and Radiation Physics, Gent, Belgium. C.Wagemans, 2308200100012 corresponding author,Email=cyrillus.wagemans@Ugent.be;2308200100013 L.De Smet. 2308200100014 (2FR CAD) CEA-Cadarache, Saint Paul lez Durance, 2308200100015 France. O.Serot. 2308200100016 (2BLGMOL) SCK-CEN, Mol,Belgium. J.Wagemans, J.Van Gils2308200100017 REFERENCE (J,NSE,156,211,2007) Main reference 2308200100018 FACILITY (LINAC,2ZZZGEL) Linear electron accelerator GELINA 2308200100019 delivers a pulsed and compressed electron beam that 2308200100020 hits a rotating U-target, operated at a 800-Hz 2308200100021 repetition frequency, the electron pulses having 2308200100022 a width of 1 ns. 2308200100023 INC-SOURCE (PHOTO) Bremsstrahlung gammas produce neutrons in 2308200100024 (gamma,n) and (gamma,f) reactions 2308200100025 (THCOL) Primary neutrons are moderated in 4-cm 2308200100026 thick water-filled beryllium container. 2308200100027 INC-SPECT .Resulting is a broad spectrum with energies ranging 2308200100028 from a few milli-electronvolts up to a few MeV. The 2308200100029 shape of the moderated neutron spectrum can be 2308200100030 approximated by a Maxwellian distribution at thermal 2308200100031 energy with a 1/E high-energy tail. 2308200100032 METHOD (TOF) Time-of-flight, flight bases 30.32 and 9.36 m 2308200100033 (FNB) Filtered neutron beams. Black resonance filters 2308200100034 Rh, Au, W, Co, Mn, and S put in the neutron beam for 2308200100035 TOF time-dependent spectra background determination 2308200100036 (PHD) Pulse-height discrimination 2308200100037 SAMPLE .Uranium oxide on a 20 micrometer thick AL foil 2308200100038 spanned on a metallic frame. Active diameter 50 mm. 2308200100039 ------- 2308200100040 Nucleus Thickness Isotopic Composition 2308200100041 Sample# mu-g/cm2 (atomic %) 2308200100042 233U 234U 235U 236U 238U 2308200100043 ----------------------------------------------------- 2308200100044 234U 1 101.7+-0.5 0.001 99.868 0.076 .048 .007 2308200100045 234U 2 106.4+-0.5 0.001 99.868 0.076 .048 .007 2308200100046 235U 1 110.9+-0.7 0.0056 0.0408 99.040 .2632 .6502 2308200100047 235U 2 199.9+-1.1 0.0056 0.0408 99.040 .2632 .6502 2308200100048 ----------------------------------------------------- 2308200100049 .Two boron samples (1) 80. and (2) 8. microgram/cm2 2308200100050 MONITOR (5-B-10(N,A)3-LI-7,,SIG) 2308200100051 CORRECTION .Correction for the 235U(n,f) contribution to the yield2308200100052 of 234U(n,f), for time-dependent TOF spectra back- 2308200100053 ground 2308200100054 ERR-ANALYS .Total errors are composed of the strongly 2308200100055 energy-dependent statistical, a systematic error and 2308200100056 overall normalization uncertainties given below and 2308200100057 in specific Sub-entries 2308200100058 (ERR-1) Error of number of atoms in 234U samples for 2308200100059 both 30 and 9 flight paths measurements 2308200100060 (ERR-2) Error of number of atoms in 10-B samples for 2308200100061 both 30 and 9 flight paths measurements 2308200100062 HISTORY (20091102C) S.M. 2308200100063 ENDBIB 61 0 2308200100064 COMMON 2 3 2308200100065 ERR-1 ERR-2 2308200100066 PER-CENT PER-CENT 2308200100067 0.5 1. 2308200100068 ENDCOMMON 3 0 2308200100069 ENDSUBENT 68 0 2308200199999 SUBENT 23082002 20091102 22162308200200001 BIB 7 18 2308200200002 REACTION (92-U-234(N,F),,SIG) 2308200200003 DETECTOR (FISCH) Double Frish-gridded ionization chamber with 2308200200004 ultrapure methane as a working gas 2308200200005 METHOD (TOF) Flight base 30.32 m 2308200200006 (STTA) Stack target measurements with 234U/235U and 2308200200007 10-B/235U back-to-back samples mounted on the 2308200200008 cathode of the Frish-gridded ionization chamber 2308200200009 SAMPLE .A monitor B-10 sample 80. microgram/cm2 was used 2308200200010 REL-REF (A,10620004,G.James+,J,PR/C,15,2083,1977) 2308200200011 ERR-ANALYS (ERR-3) 234U alpha pile up correction error 2308200200012 (ERR-4) 235U alpha pile up correction error 2308200200013 (ERR-5) Number of atoms in 234U sample error 2308200200014 (ERR-6) Number of atoms in 235U sample error 2308200200015 (EN-ERR-DIG) Energy digitizing error 2308200200016 (ERR-DIG) Data digitizing error 2308200200017 (DATA-ERR) Error bar on Fig.6 2308200200018 STATUS (CURVE) Fig.6 of NSE, vol.156, p.211. 2308200200019 Request for data sent to C.Wagemans 2009-08-25 2308200200020 ENDBIB 18 0 2308200200021 COMMON 6 3 2308200200022 ERR-3 ERR-4 ERR-5 ERR-6 EN-ERR-DIG ERR-DIG 2308200200023 PER-CENT PER-CENT PER-CENT PER-CENT EV B 2308200200024 7. 0.9 0.5 0.5 2.8256E-02 3.5129E-042308200200025 ENDCOMMON 3 0 2308200200026 DATA 3 42 2308200200027 EN DATA DATA-ERR 2308200200028 EV B B 2308200200029 551.27 0.14632 0.60976E-1 2308200200030 552.11 0.15850 0.85365E-1 2308200200031 553.59 0.31700 0.12195 2308200200032 554.30 1.4755 0.30488 2308200200033 555.14 4.1950 0.68293 2308200200034 555.91 5.3414 0.82927 2308200200035 556.62 4.5365 0.73171 2308200200036 557.39 1.9511 0.36585 2308200200037 558.16 0.56082 0.17073 2308200200038 559.00 0.34129 0.10976 2308200200039 559.70 1.5852 0.31707 2308200200040 560.41 3.1096 0.52439 2308200200041 561.31 3.1827 0.50000 2308200200042 562.02 1.8534 0.35366 2308200200043 562.86 0.39000 0.17073 2308200200044 566.72 0.11875E-1 0.73171E-1 2308200200045 569.10 0.72805E-1 0.24390E-1 2308200200046 572.32 0.14591 0.73169E-1 2308200200047 573.09 0.58492 0.19512 2308200200048 573.86 1.1825 0.29268 2308200200049 574.63 1.5727 0.34146 2308200200050 575.47 1.2556 0.31707 2308200200051 576.31 0.38974 0.13415 2308200200052 577.21 0.84845E-1 0.85367E-1 2308200200053 577.98 0.60440E-1 0.60977E-1 2308200200054 579.59 0.15797 0.48781E-1 2308200200055 580.36 0.49942 0.17073 2308200200056 581.20 1.8775 0.37805 2308200200057 582.10 3.2189 0.52439 2308200200058 582.87 2.3896 0.43903 2308200200059 583.64 1.0725 0.23171 2308200200060 584.48 0.99934 0.23171 2308200200061 585.19 1.5115 0.30488 2308200200062 586.09 1.5237 0.31707 2308200200063 586.99 0.48710 0.15854 2308200200064 588.73 0.11454E-1 0.60976E-1 2308200200065 589.50 0.48025E-1 0.48780E-1 2308200200066 590.27 0.48010E-1 0.36585E-1 2308200200067 591.94 0.47978E-1 0.60976E-1 2308200200068 593.68 0.84530E-1 0.60974E-1 2308200200069 594.52 0.23086 0.10976 2308200200070 598.70 0.23459E-1 0.85365E-1 2308200200071 ENDDATA 44 0 2308200200072 ENDSUBENT 71 0 2308200299999 SUBENT 23082003 20091102 22162308200300001 BIB 8 22 2308200300002 REACTION 1(92-U-234(N,F),,SIG) Flight path 9 m 2308200300003 2(92-U-234(N,F),,SIG) Flight path 30 m 2308200300004 DETECTOR (SIBAR) The Si-Au surface-barrier detector 2308200300005 METHOD (STTA) Stack target measurements with 234U/10-B and 2308200300006 235U/10-B back-to-back samples mounted in the center 2308200300007 vacuum chamber together with two Si-Au detectors 2308200300008 positioned outside the neutron beam 2308200300009 1(TOF) Flight base 9.36 m 2308200300010 2(TOF) Flight base 30.286 m 2308200300011 ANALYSIS .Low-detection geometry (15% of 2*pi) 2308200300012 SAMPLE .A monitor B-10 sample 80. microgram/cm2 was used 2308200300013 REL-REF (A,10620004,G.James+,J,PR/C,15,2083,1977) 2308200300014 ERR-ANALYS (ERR-3) 234U alpha pile up correction error 2308200300015 (ERR-4) 235U alpha pile up correction error 2308200300016 (ERR-5) Number of atoms in 234U sample error 2308200300017 (ERR-6) Number of atoms in 235U sample error 2308200300018 (EN-ERR-DIG) Energy digitizing error 2308200300019 (ERR-DIG) Data digitizing error 2308200300020 (DATA-ERR) Error bar on the fig 2308200300021 STATUS (CURVE) Cross section represented on Fig. 11 and 2308200300022 Fig.8 of NSE,156,211,2007. Request for data sent to 2308200300023 C.Wagemans 2009-08-25 2308200300024 ENDBIB 22 0 2308200300025 COMMON 4 3 2308200300026 ERR-3 ERR-4 ERR-5 ERR-6 2308200300027 PER-CENT PER-CENT PER-CENT PER-CENT 2308200300028 0.9 0.8 0.5 0.6 2308200300029 ENDCOMMON 3 0 2308200300030 DATA 9 55 2308200300031 EN DATA 1DATA-ERR 1EN-ERR-DIG1ERR-DIG 1DATA 22308200300032 DATA-ERR 2EN-ERR-DIG2ERR-DIG 2 2308200300033 EV B B EV B B 2308200300034 B EV B 2308200300035 4.8383 0.15757 0.22081 7.5904E-04 1.6488E-02 0.52558 2308200300036 0.62561 7.5904E-04 1.6488E-02 2308200300037 4.8502 0.26785 0.25761 7.5904E-04 1.6488E-02 2308200300038 2308200300039 4.8588 -.6345E-012308200300040 0.29441 7.5904E-04 1.6488E-02 2308200300041 4.8837 0.15709 0.29441 7.5904E-04 1.6488E-02 2308200300042 2308200300043 4.8988 0.9730E-022308200300044 0.18401 7.5904E-04 1.6488E-02 2308200300045 4.9334 0.34058 0.33121 7.5904E-04 1.6488E-02 2308200300046 2308200300047 4.9399 0.26691 2308200300048 0.62564 7.5904E-04 1.6488E-02 2308200300049 4.9496 0.41401 0.29442 7.5904E-04 1.6488E-02 2308200300050 2308200300051 4.9604 1.0395 2308200300052 0.69923 7.5904E-04 1.6488E-02 2308200300053 4.9658 0.48745 0.29442 7.5904E-04 1.6488E-02 2308200300054 2308200300055 4.9809 0.26648 2308200300056 0.25761 7.5904E-04 1.6488E-02 2308200300057 4.9993 0.67110 0.36801 7.5904E-04 1.6488E-02 2308200300058 2308200300059 5.0026 0.15585 2308200300060 0.18401 7.5904E-04 1.6488E-02 2308200300061 5.0177 1.1125 0.33121 7.5904E-04 1.6488E-02 2308200300062 2308200300063 5.0231 1.9589 2308200300064 0.77283 7.5904E-04 1.6488E-02 2308200300065 5.0350 1.3700 0.33122 7.5904E-04 1.6488E-02 2308200300066 2308200300067 5.0436 1.0019 2308200300068 0.51522 7.5904E-04 1.6488E-02 2308200300069 5.0512 1.7010 0.36800 7.5904E-04 1.6488E-02 2308200300070 2308200300071 5.0653 1.2224 2308200300072 0.44162 7.5904E-04 1.6488E-02 2308200300073 5.0685 3.6513 0.58881 7.5904E-04 1.6488E-02 2308200300074 2308200300075 5.0858 5.4912 0.95685 7.5904E-04 1.6488E-02 2308200300076 2308200300077 5.0869 5.6752 2308200300078 1.2880 7.5904E-04 1.6488E-02 2308200300079 5.1032 7.7727 1.3249 7.5904E-04 1.6488E-02 2308200300080 2308200300081 5.1086 7.8462 2308200300082 1.6929 7.5904E-04 1.6488E-02 2308200300083 5.1216 11.710 2.0241 7.5904E-04 1.6488E-02 2308200300084 2308200300085 5.1313 11.305 2308200300086 2.2449 7.5904E-04 1.6488E-02 2308200300087 5.1378 13.918 2.5025 7.5904E-04 1.6488E-02 2308200300088 2308200300089 5.1551 15.832 2.7969 7.5904E-04 1.6488E-02 2308200300090 2308200300091 5.1616 16.384 2308200300092 2.4657 7.5904E-04 1.6488E-02 2308200300093 5.1735 14.691 2.5761 7.5904E-04 1.6488E-02 2308200300094 2308200300095 5.1908 12.961 2.1713 7.5904E-04 1.6488E-02 2308200300096 2308200300097 5.2069 9.3909 2308200300098 1.5089 7.5904E-04 1.6488E-02 2308200300099 5.2102 9.2436 1.5456 7.5904E-04 1.6488E-02 2308200300100 2308200300101 5.2274 5.0481 0.99361 7.5904E-04 1.6488E-02 2308200300102 2308200300103 5.2447 4.3855 0.77281 7.5904E-04 1.6488E-02 2308200300104 2308200300105 5.2523 3.3182 2308200300106 0.80964 7.5904E-04 1.6488E-02 2308200300107 5.2631 2.1036 0.44161 7.5904E-04 1.6488E-02 2308200300108 2308200300109 5.2814 2.0298 0.36800 7.5904E-04 1.6488E-02 2308200300110 2308200300111 5.2966 1.2936 2308200300112 0.44159 7.5904E-04 1.6488E-02 2308200300113 5.2998 0.99917 0.33120 7.5904E-04 1.6488E-02 2308200300114 2308200300115 5.3182 0.55736 0.33121 7.5904E-04 1.6488E-02 2308200300116 2308200300117 5.3366 0.70437 0.22080 7.5904E-04 1.6488E-02 2308200300118 2308200300119 5.3430 0.22589 2308200300120 0.25761 7.5904E-04 1.6488E-02 2308200300121 5.3560 0.59377 0.33121 7.5904E-04 1.6488E-02 2308200300122 2308200300123 5.3744 0.40957 0.33120 7.5904E-04 1.6488E-02 2308200300124 2308200300125 5.3874 0.22542 2308200300126 0.25760 7.5904E-04 1.6488E-02 2308200300127 5.4111 0.22517 0.29439 7.5904E-04 1.6488E-02 2308200300128 2308200300129 5.4360 0.4091E-012308200300130 0.18401 7.5904E-04 1.6488E-02 2308200300131 5.4522 0.40875 0.33121 7.5904E-04 1.6488E-02 2308200300132 2308200300133 5.4717 0.26134 0.29441 7.5904E-04 1.6488E-02 2308200300134 2308200300135 5.4825 0.7722E-012308200300136 0.25760 7.5904E-04 1.6488E-02 2308200300137 5.5095 0.18734 0.29441 7.5904E-04 1.6488E-02 2308200300138 2308200300139 5.5311 0.22392 2308200300140 0.29440 7.5904E-04 1.6488E-02 2308200300141 5.5495 0.11332 0.22081 7.5904E-04 1.6488E-02 2308200300142 2308200300143 5.5689 0.11312 0.33121 7.5904E-04 1.6488E-02 2308200300144 2308200300145 ENDDATA 114 0 2308200300146 ENDSUBENT 145 0 2308200399999 SUBENT 23082004 20091102 22162308200400001 BIB 3 6 2308200400002 REACTION (92-U-234(N,F),,RI,,LIM) 2308200400003 ERR-ANALYS (ERR-T) Total error 2308200400004 STATUS (TABLE) Table III of NSE,156,211,2007 and text, 2308200400005 page 216 bottom 2308200400006 (DEP,23082002) 2308200400007 (DEP,23082003) 2308200400008 ENDBIB 6 0 2308200400009 NOCOMMON 0 0 2308200400010 DATA 4 1 2308200400011 EN-MIN EN-MAX DATA ERR-T 2308200400012 EV EV B B 2308200400013 0.5 1.0 E+05 0.858 0.060 2308200400014 ENDDATA 3 0 2308200400015 ENDSUBENT 14 0 2308200499999 SUBENT 23082005 20091102 22162308200500001 BIB 6 16 2308200500002 REACTION (92-U-234(N,F),,WID,,,DERIV) Derived from cross sec- 2308200500003 tion in this paper and resonance parameters from 2308200500004 JEFF-3.1 library 2308200500005 ANALYSIS (SHAPE) Performed with SAMMY code 2308200500006 REL-REF (R,,N.Larson+,R,ORNL-TM-9179,2003) SAMMY code 2308200500007 .Assumed data from JEFF-3.1 library for -2.16 eV res. 2308200500008 ASSUMED (ASSUM1,92-U-234(N,0),,EN) Negative resonance 2308200500009 (ASSUM2,92-U-234(N,TOT),,WID) For negative resonance 2308200500010 (ASSUM3,92-U-234(N,EL),,WID) For negative resonance 2308200500011 (ASSUM4,92-U-234(N,G),,WID) For negative resonance 2308200500012 (ASSUM5,92-U-234(N,F),,WID) For negative resonance 2308200500013 ERR-ANALYS (DATA-ERR) Total error 2308200500014 STATUS .Text from NSE,156,211,2007, page 218 2308200500015 (DEP,23082002) 2308200500016 (DEP,23082003) 2308200500017 (DEP,22492003) 2308200500018 ENDBIB 16 0 2308200500019 COMMON 5 3 2308200500020 ASSUM1 ASSUM2 ASSUM3 ASSUM4 ASSUM5 2308200500021 EV MILLI-EV MILLI-EV MILLI-EV MILLI-EV 2308200500022 -2.16 30.156 3.92 24.4 16. E-03 2308200500023 ENDCOMMON 3 0 2308200500024 DATA 3 1 2308200500025 EN-RES DATA DATA-ERR 2308200500026 EV MICRO-EV MICRO-EV 2308200500027 5.16 18.60 1.11 2308200500028 ENDDATA 3 0 2308200500029 ENDSUBENT 28 0 2308200599999 ENDENTRY 5 0 2308299999999