ENTRY 22120 20090401 22112212000000001 SUBENT 22120001 20090401 22112212000100001 BIB 15 56 2212000100002 INSTITUTE (2ZZZGEL) F.J.Hambsch,H.H.Knitter, C.Budtz-joerensen. 2212000100003 (2GERTHD) J.P.Theobald 2212000100004 REFERENCE (J,NP/A,491,56,198901) 2212000100005 (W,KNITTER,1989) 2212000100006 AUTHOR (F.J.Hambsch,H.H.Knitter,C.Budtz-Joergensen, 2212000100007 J.P.Theobald) 2212000100008 TITLE -Fission mode fluctuations in the resonances of 2212000100009 235-U(N,F). 2212000100010 FACILITY (LINAC,2ZZZGEL) The Geel linac gelina was used as 2212000100011 pulsed white neutron source. For the measurements 2212000100012 in the 0.4 eV to 500 KeV range the machine parameters 2212000100013 were 800 hz pulse repetition rate, 0.7 ns pulse width 2212000100014 and 10 kw beam power at 100 MeV electrons. For the 2212000100015 energy range from 0.006 eV to 25 eV the corresponding 2212000100016 parameters were 40 hz, 2 micro-S and 1.5 to 2 kw, 2212000100017 respectively. 2212000100018 INC-SOURCE (PHOTO) Neutrons were produced in the beam stop target 2212000100019 and moderated above and below the target. The direct 2212000100020 target yield was shielded by 20 cm lead and 20 cm 2212000100021 copper. A 0.1 g/cm2 10-B filter was used in the 800 hz2212000100022 measurements to reduce the flux of slow neutrons. The 2212000100023 beam was tailored in a collimator to give a beam spot 2212000100024 of 7 cm diameter at the fission chamber position. 2212000100025 .Measurements with a 5 cm thick paraffin block in front2212000100026 of the fission chamber gave a thermal neutron flux, 2212000100027 which was used as reference. 2212000100028 SAMPLE .The fission sample was prepared by vacuum evaporation 2212000100029 of uf4. The fission layer had a diameter of 7 cm and a2212000100030 thickness of 47 micro-g/cm2. The isotopic composition 2212000100031 was 99.8098%, 0.0638%, 0.0389%, and 0.0875% for 2212000100032 235-U, 234-U, 236-U and 238-U, respectively. 2212000100033 The UF4-layer was supported by a 30 micro-g/cm2 2212000100034 polyimide foil, spanned on an aluminium ring 2212000100035 of 10 cm outer and 8 cm inner diameter. The polyimide 2212000100036 foil was evaporated from both sides with gold 2212000100037 layers of 40 micro-g/cm2 for electrical conductivity. 2212000100038 METHOD (TOF) A flight path of 8.83 m from from the target to2212000100039 the fission chamber was used. 2212000100040 DETECTOR (FISCH) A twin frisch-gridded ionization chamber, in- 2212000100041 cluding an ionization chamber for gamma-flash compen- 2212000100042 sation, was used for the fission fragment detection. 2212000100043 The two alpha-particle lines at 4.396 MeV and 4.773 2212000100044 MeV from 235-U and 234-U, respectively, were used for 2212000100045 absolute calibration. 2212000100046 PART-DET (FF) 2212000100047 CORRECTION .No details given. 2212000100048 ERR-ANALYS (DATA-ERR) No details given. 2212000100049 COMMENT .Data of fission fragment mass distributions are given 2212000100050 in figures of the main ref. 2212000100051 STATUS (TABLE) Data taken from main ref. 2212000100052 HISTORY (19891102C) N.O. 2212000100053 (19891211E) 2212000100054 in san 001 - facility code corrected, 2212000100055 new reference added, 2212000100056 free text under 'institute' interpreted 2212000100057 Upper case to low case converted 2212000100058 ENDBIB 56 0 2212000100059 NOCOMMON 0 0 2212000100060 ENDSUBENT 59 0 2212000199999 SUBENT 22120002 20090401 22112212000200001 BIB 3 3 2212000200002 REACTION (92-U-235(N,F),,AKE,FF) 2212000200003 COMMENT .Result of the 40 hz measurement. 2212000200004 HISTORY (20090401U) STATUS keywd deleted - in SAN 001 2212000200005 ENDBIB 3 0 2212000200006 NOCOMMON 0 0 2212000200007 DATA 6 12 2212000200008 EN-MIN EN-MAX SPIN J PARITY DATA DATA-ERR 2212000200009 EV EV NO-DIM NO-DIM MEV MEV 2212000200010 6.E-03 8.E-03 1.706E+02 2.E-022212000200011 8.E-03 1.E-02 1.7063E+02 2.E-022212000200012 1.E-02 1.3E-02 1.7062E+02 2.E-022212000200013 1.3E-02 1.8E-02 1.706E+02 1.E-022212000200014 1.8E-02 2.3E-02 1.7059E+02 2.E-022212000200015 2.3E-02 3.E-02 1.706E+02 2.E-022212000200016 2.5E-02 2.5E-02 1.706E+02 6.E-032212000200017 3.E-02 4.4E-02 1.7056E+02 2.E-022212000200018 4.4E-02 6.2E-02 1.7062E+02 2.E-022212000200019 6.2E-02 1.E-01 1.7056E+02 3.E-022212000200020 1.E-01 2.1E-01 1.7062E+02 2.E-022212000200021 2.85E-01 2.85E-01 3. -1. 1.7051E+02 3.E-022212000200022 ENDDATA 14 0 2212000200023 ENDSUBENT 22 0 2212000299999 SUBENT 22120003 20090401 22112212000300001 BIB 3 3 2212000300002 REACTION (92-U-235(N,F),,AKE,FF) 2212000300003 COMMENT .Result of the 800 Hz measurement. 2212000300004 HISTORY (20090401U) STATUS keywd deleted - in SAN 001 2212000300005 ENDBIB 3 0 2212000300006 NOCOMMON 0 0 2212000300007 DATA 4 51 2212000300008 EN-MIN EN-MAX DATA DATA-ERR 2212000300009 EV EV MEV MEV 2212000300010 2.5E-02 2.5E-02 1.706E+02 5.E-03 2212000300011 1.14 1.14 1.7057E+02 5.E-02 2212000300012 3.14 3.14 1.7084E+02 7.E-02 2212000300013 3.61 3.61 1.7069E+02 7.E-02 2212000300014 4.85 4.85 1.7077E+02 1.4E-01 2212000300015 5.2 6.1 1.7062E+02 7.E-02 2212000300016 6.38 6.38 1.7075E+02 8.E-02 2212000300017 7.08 7.08 1.709E+02 7.E-02 2212000300018 8.77 8.77 1.7067E+02 2.E-02 2212000300019 9.28 9.28 1.7074E+02 5.E-02 2212000300020 1.018E+01 1.018E+01 1.7095E+02 8.E-02 2212000300021 1.167E+01 1.167E+01 1.7083E+02 7.E-02 2212000300022 1.24E+01 1.24E+01 1.7082E+02 3.E-02 2212000300023 1.27E+01 1.47E+01 1.7084E+02 3.E-02 2212000300024 1.609E+01 1.609E+01 1.7082E+02 8.E-02 2212000300025 1.666E+01 1.666E+01 1.7099E+02 7.E-02 2212000300026 1.806E+01 1.806E+01 1.7082E+02 6.E-02 2212000300027 1.93E+01 1.93E+01 1.7097E+02 2.E-02 2212000300028 2.017E+01 2.017E+01 1.7092E+02 1.1E-01 2212000300029 2.063E+01 2.063E+01 1.7073E+02 1.2E-01 2212000300030 2.107E+01 2.107E+01 1.7068E+02 6.E-02 2212000300031 2.293E+01 2.293E+01 1.7092E+02 8.E-02 2212000300032 2.34E+01 2.36E+01 1.7075E+02 5.E-02 2212000300033 2.42E+01 2.45E+01 1.7072E+02 6.E-02 2212000300034 2.52E+01 2.56E+01 1.7055E+02 6.E-02 2212000300035 2.56E+01 2.56E+01 1.7072E+02 8.E-02 2212000300036 2.646E+01 2.646E+01 1.708E+02 7.E-02 2212000300037 2.779E+01 2.779E+01 1.7073E+02 7.E-02 2212000300038 2.836E+01 2.836E+01 1.7073E+02 1.3E-01 2212000300039 3.06E+01 3.09E+01 1.7086E+02 8.E-02 2212000300040 3.208E+01 3.208E+01 1.7084E+02 5.E-02 2212000300041 3.352E+01 3.352E+01 1.7106E+02 6.E-02 2212000300042 3.44E+01 3.51E+01 1.7066E+02 2.E-02 2212000300043 3.941E+01 3.941E+01 1.7051E+02 5.E-02 2212000300044 4.13E+01 4.29E+01 1.7082E+02 5.E-02 2212000300045 4.29E+01 4.61E+01 1.7069E+02 5.E-02 2212000300046 4.68E+01 4.7E+01 1.7082E+02 6.E-02 2212000300047 4.74E+01 4.97E+01 1.7074E+02 5.E-02 2212000300048 4.98E+01 5.27E+01 1.7074E+02 3.E-02 2212000300049 5.45E+01 5.69E+01 1.7099E+02 3.E-02 2212000300050 5.72E+01 5.91E+01 1.7095E+02 5.E-02 2212000300051 5.91E+01 6.15E+01 1.7089E+02 6.E-02 2212000300052 6.26E+01 6.49E+01 1.708E+02 8.E-02 2212000300053 6.5E+01 6.76E+01 1.7073E+02 1.2E-01 2212000300054 6.88E+01 7.32E+01 1.7078E+02 4.E-02 2212000300055 7.38E+01 7.61E+01 1.7081E+02 6.E-02 2212000300056 7.65E+01 8.19E+01 1.7065E+02 6.E-02 2212000300057 8.19E+01 8.62E+01 1.7059E+02 4.E-02 2212000300058 8.87E+01 8.87E+01 1.7068E+02 8.E-02 2212000300059 8.95E+01 9.33E+01 1.7082E+02 5.E-02 2212000300060 9.34E+01 9.89E+01 1.7071E+02 6.E-02 2212000300061 ENDDATA 53 0 2212000300062 ENDSUBENT 61 0 2212000399999 ENDENTRY 3 0 2212099999999