ENTRY 14273 20100820 13671427300000001 SUBENT 14273001 20100820 13671427300100001 BIB 14 28 1427300100002 TITLE New measurement of the 238Pu(n,f) cross-section 1427300100003 AUTHOR (T.Granier,R.Nelson,P.Romain,M.Devlin,N.Fotiades) 1427300100004 INSTITUTE (2FR BRC,1USALAS) 1427300100005 REFERENCE (S,AIP-1175,227,2009) 1427300100006 FACILITY (LINAC,1USALAS) Experiment performed at LANSCE facility1427300100007 SAMPLE 238Pu with the weight of 20 mu-g placed in the fission 1427300100008 ionization chamber 1427300100009 METHOD (TOF) Ionization chamber placed behind GEANIE 1427300100010 spectrometer 1427300100011 flight path approx. 20 m 1427300100012 time interval between proton pulses 1.8 mu-s 1427300100013 subnanosecond pulse width 1427300100014 INC-SOURCE (SPALL) 800 MeV protons from linac on W target 1427300100015 DETECTOR (IOCH) Cylindrical fission ionization chamber with 1427300100016 outer diameter of 4mm and total length of 3 cm, 1427300100017 developed at CEA. Two planar fission chambers of 1427300100018 the GEANIE setup with foils of 238U and 235 U 1427300100019 were used as beam monitors. 1427300100020 ANALYSIS Cross sections were determined from ratio of 235U,238U 1427300100021 fissions to 238Pu fissions. 1427300100022 MONITOR 1(92-U-235(N,F),,SIG) 1427300100023 2(92-U-238(N,F),,SIG) 1427300100024 MONIT-REF 1(,,3,ENDF/B-VII.0,9228,2006) 1427300100025 2(,,3,ENDF/B-VII.0,9237,2006) 1427300100026 CORRECTION Data corrected for contribution of 239Pu and 234U 1427300100027 from alpha decay of 238Pu and for wraparound effect 1427300100028 (overlap of slow neutrons from previous neutron pulse) 1427300100029 HISTORY (20100820C) Compiled by S.H. 1427300100030 ENDBIB 28 0 1427300100031 NOCOMMON 0 0 1427300100032 ENDSUBENT 31 0 1427300199999 SUBENT 14273002 20100820 13671427300200001 BIB 3 6 1427300200002 REACTION (94-PU-238(N,F),,SIG,,AV) 1427300200003 STATUS (TABLE,CURVE) Data presented in fig. 2 of the 1427300200004 reference, sent by author (T.G) Upper edge of highest 1427300200005 energy bin read from the figure 1427300200006 (PRELM) Preliminary data 1427300200007 ERR-ANALYS (ERR-S) Statistical uncertainty 1427300200008 ENDBIB 6 0 1427300200009 NOCOMMON 0 0 1427300200010 DATA 4 14 1427300200011 EN-MIN EN-MAX DATA ERR-S 1427300200012 MEV MEV B B 1427300200013 1.48 2.07 2.39 0.12 1427300200014 2.07 2.89 2.20 0.11 1427300200015 2.89 4.05 2.15 0.11 1427300200016 4.05 5.67 1.98 0.11 1427300200017 5.67 7.94 1.98 0.11 1427300200018 7.94 11.11 2.35 0.13 1427300200019 11.11 15.56 2.19 0.15 1427300200020 15.56 21.78 2.29 0.18 1427300200021 21.78 30.49 2.33 0.17 1427300200022 30.49 42.69 2.12 0.15 1427300200023 42.69 59.76 1.68 0.12 1427300200024 59.76 83.67 1.77 0.12 1427300200025 83.67 117.10 1.70 0.12 1427300200026 117.10 161.00 1.68 0.12 1427300200027 ENDDATA 16 0 1427300200028 ENDSUBENT 27 0 1427300299999 ENDENTRY 2 0 1427399999999