ENTRY 14097 20110124 13701409700000001 SUBENT 14097001 20110124 13701409700100001 BIB 10 24 1409700100002 INSTITUTE (1USAANL,1USANWU) 1409700100003 REFERENCE (J,PR,114,1351,1959) 1409700100004 AUTHOR (A.B.Smith,P.R.Fields,R.K.Sjoblom,J.H.Roberts) 1409700100005 TITLE Precise Determination of the U233 Fission Neutron 1409700100006 Spectrum 1409700100007 FACILITY (REAC,1USAANL) CP-5 research reactor 1409700100008 INC-SOURCE Thermal neutron flux inducing 5E5 fission/minutes 1409700100009 METHOD (TOF) Fast time of flight techniques are employed 1409700100010 to study the neutron energy distribution from 0.3 to 1409700100011 5.0 Mev 1409700100012 The experimentally determined fission neutron spectrum 1409700100013 is expressed in the form: N(E)=(a0+a1E+a2E2)f(E), 1409700100014 where E is the neutron energy in Mev, N(E) is the 1409700100015 number of U233 fission neutrons per unit energy 1409700100016 interval, f(E) is the U235 prompt fission neutron 1409700100017 spectrum, and a0, a1, and a2 are constants normalized 1409700100018 to give agreement with the known average number of 1409700100019 U233 prompt fission neutrons 1409700100020 DETECTOR (PLATE) Proton recoil emulsions are utilized for 1409700100021 neutron measurements from 1.2 to 7.0 Mev 1409700100022 SAMPLE Uranium oxide foil of 500 microg 1409700100023 HISTORY (20060519C) DR 1409700100024 (20061120A) DR EN-DUMMY changed to EN 1409700100025 (20101122A) OS. REACTION corrected 1409700100026 ENDBIB 24 0 1409700100027 COMMON 1 3 1409700100028 EN 1409700100029 EV 1409700100030 0.0253 1409700100031 ENDCOMMON 3 0 1409700100032 ENDSUBENT 31 0 1409700199999 SUBENT 14097002 20110124 13701409700200001 BIB 4 4 1409700200002 REACTION (92-U-233(N,F)0-NN-1,PR,KE) 1409700200003 ERR-ANALYS (DATA-ERR) No information 1409700200004 STATUS (TABLE) Data taken from text 1409700200005 HISTORY (20101122A) OS. REACTION SF6 changed from AKE to KE 1409700200006 ENDBIB 4 0 1409700200007 NOCOMMON 0 0 1409700200008 DATA 2 1 1409700200009 DATA DATA-ERR 1409700200010 MEV MEV 1409700200011 1.870 0.04 1409700200012 ENDDATA 3 0 1409700200013 ENDSUBENT 12 0 1409700299999 ENDENTRY 2 0 1409799999999