ENTRY O1501 20081115 O037O150100000001 SUBENT O1501001 20081115 O037O150100100001 BIB 16 61 O150100100002 TITLE Measurements of nucleon-induced fission cross-sections O150100100003 of separated tungsten isotopes and natural tungsten O150100100004 in the 5-200 MeV energy region. O150100100005 AUTHOR (V.P.Eismont, N.P.Filatov, A.N.Smirnov, S.M.Soloviev, O150100100006 J.Blomgren, H.Conde, A.V.Prokofiev, S.G.Mashnik) O150100100007 INSTITUTE (4RUSRI) O150100100008 (2SWDUPP) Department of neutron research and the O150100100009 Svedberg Laboratory (TSL), Uppsala University. O150100100010 (1USALAS) O150100100011 REFERENCE (S,ISINN-13,309,2006) Preliminary results. O150100100012 Data were reanalysed by authors.New data were reportedO150100100013 to NICE2007. O150100100014 REL-REF (R,22882001,A.N.SMIRNOV+,J,PR/C,70,054603,2004) O150100100015 The design of the thin-film breakdown counters fission O150100100016 chambers. O150100100017 FACILITY (CYCLO,2SWDUPP) The broad proton beam facility at TSL O150100100018 the Svedbegrg Laboratory, Uppsala University. O150100100019 PART-DET (FF) O150100100020 COMMENT -By authors: absolute (p,f) cross sections for O150100100021 separated isotopes of tungsten W-182,183,184 and 186 O150100100022 and W-natural have been obtained by multiplication of O150100100023 the measured cross section ratios to the parameterizedO150100100024 the Bi-209(p,f) cross section. O150100100025 MONITOR (83-BI-209(P,F),,SIG) O150100100026 MONIT-REF (,A.N.SMIRNOV+,J,NSTS,2,238,2002) O150100100027 DETECTOR (TFBC) Thin-film breakdown counters fission chambers. O150100100028 The number of detector-target sandwiches=4, their O150100100029 sensitive area 2.3-cm**2 in the mosaic arrangements. O150100100030 The mosaic arrangements were irradiated in pairs and O150100100031 one of them was used as a relative monitor of the O150100100032 proton flux. The proton flux was monitored by O150100100033 detection of protons scattered by a 0.1-mm thick O150100100034 stainless steel exit window of the beam line at an O150100100035 angle of about 45-degree by means of a scintillation O150100100036 telescope. O150100100037 SAMPLE Metal powder of separated isotopes of tungsten were O150100100038 transformed to W/O3 chemical form, deposited on O150100100039 aluminum backings by evaporation in vacuum. O150100100040 Thickness of deposited layers about 2-mg/cm**2, O150100100041 defined by direct weighting and by Rutherford O150100100042 backscattering alpha-particles. O150100100043 ERR-ANALYS (ERR-1) Maximal total statistical uncertainty of O150100100044 relative results for proton measurements above O150100100045 90-MeV. O150100100046 (ERR-2).See above but only below 60-MeV. O150100100047 (ERR-S) Statistical uncertainty. O150100100048 CORRECTION Correction to fission event counting rates, O150100100049 connected with- O150100100050 1. Thin-film breakdown counters fission chambers O150100100051 detection efficiency taking into account charge, O150100100052 mass,kinetic energy distributions of fission fragmentsO150100100053 and influence of angular anisotropy and linear momentumO150100100054 transfer, O150100100055 2. Background of fission events due presence of heavy O150100100056 fissile admixtures in aluminum backings. O150100100057 HISTORY (20070109C) By S.B. O150100100058 (20081115D) Entry was deleted, according authors's O150100100059 letter from 12.11.2008.New Data were reported on O150100100060 conference NICE 2007. See Entry O1697. O150100100061 STATUS (TABLE) In text O150100100062 (COREL,22937001) Data for (n,f) reaction. O150100100063 ENDBIB 61 0 O150100100064 COMMON 2 3 O150100100065 ERR-1 ERR-2 O150100100066 PER-CENT PER-CENT O150100100067 10. 25. O150100100068 ENDCOMMON 3 0 O150100100069 ENDSUBENT 68 0 O150100199999 NOSUBENT O1501002 20081115 O037O150100200001 NOSUBENT O1501003 20081115 O037O150100300001 NOSUBENT O1501004 20081115 O037O150100400001 NOSUBENT O1501005 20081115 O037O150100500001 NOSUBENT O1501006 20081115 O037O150100600001 ENDENTRY 6 0 O150199999999