ENTRY 14418 20150605 14071441800000001 SUBENT 14418001 20150605 14071441800100001 BIB 13 27 1441800100002 TITLE Ratio of the prompt fission neutron spectrum of 239Pu 1441800100003 to that of 235U 1441800100004 AUTHOR (M.Sugimoto, A.B.Smith, P.T.Guenther) 1441800100005 INSTITUTE (1USAANL) 1441800100006 REFERENCE (J,NSE,97,235,1987) 1441800100007 (R,ANL-NDM-96,1986) Extended version of the NSE article1441800100008 FACILITY (DYNAM,1USAANL) 1441800100009 INC-SOURCE (P-LI7) 7Li(p,n)7Be at 0 deg 1441800100010 SAMPLE Solid metal cylinders of identical size (2 cm in diam, 1441800100011 2 cm long). 1441800100012 Pu sample in 0.1 mm thick welded-steel can, while U 1441800100013 sample not clad. 1441800100014 Placed 15 cm from the neutron source at the focus of 1441800100015 10 flight paths. 1441800100016 (94-PU-239,ENR=0.955) 1441800100017 (92-U-235,ENR=0.946) 1441800100018 METHOD (TOF) Flight paths in length from 4.976 to 5.077 m, 1441800100019 measured to +/-0.5 cm including mean detector 1441800100020 thickness. 1441800100021 DETECTOR (SCIN) NE213 liquid scintillators (12.7 cm in diam., 1441800100022 ~2 cm thick) 1441800100023 COMMENT By author: Multiple-scattering of the fission neutrons 1441800100024 is small due to the small size of the samples. 1441800100025 ERR-ANALYS (DATA-ERR) Foreground count, background count, and 1441800100026 sum of net count from 1 to 10 MeV 1441800100027 STATUS (APRVD) Masayoshi Sugimoto (2015-06-12) 1441800100028 HISTORY (20150605C) On 1441800100029 ENDBIB 27 0 1441800100030 COMMON 2 3 1441800100031 EN EN-RSL 1441800100032 MEV MEV 1441800100033 0.55 0.05 1441800100034 ENDCOMMON 3 0 1441800100035 ENDSUBENT 34 0 1441800199999 SUBENT 14418002 20150605 14071441800200001 BIB 3 5 1441800200002 REACTION ((94-PU-239(N,F),PR,NU/DE,,NPD)/ 1441800200003 (92-U-235(N,F),PR,NU/DE,,NPD)) 1441800200004 FLAG (1.) These points are not well visible on the article 1441800200005 figure, and digitization could be less accurate. 1441800200006 STATUS (CURVE) Fig.1 of ANL/NDM-96, 1986 1441800200007 ENDBIB 5 0 1441800200008 NOCOMMON 0 0 1441800200009 DATA 5 22 1441800200010 E-MIN E-MAX DATA DATA-ERR FLAG 1441800200011 MEV MEV NO-DIM NO-DIM NO-DIM 1441800200012 1.0 1.1 0.943 0.017 1441800200013 1.1 1.2 0.975 0.015 1441800200014 1.2 1.3 0.956 1441800200015 1.3 1.4 0.938 1441800200016 1.4 1.6 0.970 1441800200017 1.6 1.7 0.946 1441800200018 1.7 1.9 0.981 1441800200019 1.9 2.0 0.992 0.012 1441800200020 2.0 2.2 0.990 1441800200021 2.2 2.4 0.995 1. 1441800200022 2.4 2.6 0.995 1. 1441800200023 2.6 2.8 1.016 1441800200024 2.8 3.0 1.003 0.011 1441800200025 3.0 3.5 1.025 1441800200026 3.5 4.0 1.047 1441800200027 4.0 4.5 1.061 0.013 1441800200028 4.5 5.0 1.073 1441800200029 5.0 5.5 1.080 1441800200030 5.5 6.0 1.129 1441800200031 6.0 7.0 1.134 0.028 1441800200032 7.0 8.0 1.151 0.052 1441800200033 8.0 10.0 1.233 0.135 1441800200034 ENDDATA 24 0 1441800200035 ENDSUBENT 34 0 1441800299999 SUBENT 14418003 20150605 14071441800300001 BIB 3 7 1441800300002 REACTION 1(94-PU-239(N,F)0-NN-1,PR/PAR,KE) 1441800300003 2(94-PU-239(N,F)0-NN-1,PR/PAR,KE) 1441800300004 ANALYSIS 235U(n,f) PFNS in ENDF-B/V (Watt form, =2.652 MeV) 1441800300005 assumed. 1441800300006 1Linear fitting to the spectrum ratio 1441800300007 2Quadratic fitting to the spectrum ratio 1441800300008 STATUS (TABLE) Table 2 of ANL/NDM-96, 1986 1441800300009 ENDBIB 7 0 1441800300010 COMMON 2 3 1441800300011 E-MIN E-MAX 1441800300012 MEV MEV 1441800300013 1. 10. 1441800300014 ENDCOMMON 3 0 1441800300015 DATA 4 1 1441800300016 DATA 1DATA-ERR 1DATA 2DATA-ERR 2 1441800300017 MEV MEV MEV MEV 1441800300018 2.727 0.004 2.715 0.004 1441800300019 ENDDATA 3 0 1441800300020 ENDSUBENT 19 0 1441800399999 ENDENTRY 3 0 1441899999999