ENTRY 10831 20200116 14621083100000001 SUBENT 10831001 20200116 14621083100100001 BIB 12 36 1083100100002 INSTITUTE (1USABNL) 1083100100003 REFERENCE (J,NP/A,195,257,1972) 1083100100004 AUTHOR (I.G.Schroder) 1083100100005 TITLE Emission of long-range alpha-particles in the 1083100100006 subthermal-, thermal-and resonance-neutron fission of 1083100100007 Pu-239 1083100100008 FACILITY (REAC,1USABNL) Brookhaven graphite research reactor 1083100100009 SAMPLE 36 micro-GMS/sq-cm highly enriched Pu-239, 1.27-cm 1083100100010 diameter 1083100100011 DETECTOR (SOLST) Li-drifted semiconductor detector with effect- 1083100100012 IVE area of 2.0 sq-cm and depletion depth of 1-mm. 1083100100013 (BF3) Boron trifluoride counter to monitor neutron beam1083100100014 INC-SPECT Thermal neutrons 1083100100015 MONITOR (92-U-235(N,F),BIN/TER,SIG/RAT) To normalize Pu data. 1083100100016 5.157-MeV spectrum from Pu-239 fission and 1083100100017 5.486-MeV alpha spectrum from Am-241 fission used 1083100100018 to calibrate energy scale. 1083100100019 METHOD Neutron energy range selected by filters of Be or 1083100100020 quartz with a mechanical monochromator. Samarium 1083100100021 filter used to isolate 0.297-eV Pu resonance. 1083100100022 Run 1 consists of measurement of binary events 1083100100023 followed by measurements of ternary events 1083100100024 with an aluminium foil between the source and 1083100100025 counter. 1083100100026 Background measured by inverting foil and 1083100100027 making run with Al-foil between source and counter. 1083100100028 Fission ratio of Pu-239 obtained from long-range 1083100100029 alpha distribution by consideration of long-range 1083100100030 alpha particle distribution of U-235 and evaluation of1083100100031 hidden part of Pu alpha distribution. 1083100100032 ERR-ANALYS (DATA-ERR) Errors contributed by 1083100100033 -statistical errors 1083100100034 -errors in U-235 values 1083100100035 -channel determination 1083100100036 HISTORY (19790611C) 1083100100037 (20191228A) OS. REACTION in sub.2 corrected 1083100100038 ENDBIB 36 0 1083100100039 COMMON 2 3 1083100100040 MONIT MONIT-ERR 1083100100041 NO-DIM NO-DIM 1083100100042 504. 10. 1083100100043 ENDCOMMON 3 0 1083100100044 ENDSUBENT 43 0 1083100199999 SUBENT 10831002 20200116 14621083100200001 BIB 3 3 1083100200002 REACTION (94-PU-239(N,F)2-HE-4,BIN/TER,FY/RAT,,SPA) 1083100200003 STATUS (TABLE) Table 3, Nucl.Phys.A195,257,1972 1083100200004 HISTORY (20191228A) REACTION corrected 1083100200005 ENDBIB 3 0 1083100200006 NOCOMMON 0 0 1083100200007 DATA 3 1 1083100200008 EN-DUMMY DATA DATA-ERR 1083100200009 EV NO-DIM NO-DIM 1083100200010 0.0253 412. 11. 1083100200011 ENDDATA 3 0 1083100200012 ENDSUBENT 11 0 1083100299999 ENDENTRY 2 0 1083199999999