ENTRY 40089 20111020 41544008900000001 SUBENT 40089001 20111020 41544008900100001 BIB 15 41 4008900100002 INSTITUTE (4RUSKUR) 4008900100003 REFERENCE (C,70HELSINKI,1,357,197006) IAEA-CN-26/121. 4008900100004 AUTHOR (G.V.Muradyan,T.A.Mostovaya,V.I.Mostovoy, 4008900100005 Ju.G.Shchepkin) 4008900100006 TITLE A method of direct measurement of the 4008900100007 capture-to-fission cross-section ratio 4008900100008 FACILITY (LINAC,4RUSKUR) Electron linear accelerator 4008900100009 INC-SOURCE 25 MeV electron reactions on uranium sample 4008900100010 SAMPLE U-235 layer of 0.8 mg/cm2 thickness on aluminum foil 4008900100011 of 5 microm thickness was placed in the chamber along 4008900100012 neutron beam. U-235 weight - 24 mg. 4008900100013 METHOD (TOF) Time Of Flight, flight path 5 m. 4008900100014 DETECTOR 1(IOCH) Ionization chamber with 95.0 percent of 4008900100015 efficiency of fission cases registration. Argon (95%) 4008900100016 and C-O2 (5%) mixture as working gas at pressure 4008900100017 130 mm Hg. 4008900100018 2(NAICR) Capture was registered simultaneously by two 4008900100019 NaI(Tl) crystals of 200 mm diameter and 100mm length 4008900100020 (BF3) For reducing measurement series to 4008900100021 common neutron beam three monitors were used (two BF3 4008900100022 proportional counters and one NaI(Tl) crystal 4008900100023 scintillation counter) 4008900100024 MONITOR (92-U-235(N,ABS),,ALF) In energy range 0.55-20 eV 4008900100025 For determination of absolute alpha value 4008900100026 the calibration was made. 4008900100027 MONIT-REF (20917001,F.D.Brooks+,R,AERE-M-1670,1966) 4008900100028 PART-DET 1(FF) Fission Fragments 4008900100029 2(G) Gammas 4008900100030 COMMENT Five measurements series with working chamber and five 4008900100031 measurements series with imitating chamber were made. 4008900100032 In DATA section the data averaged on standard energy 4008900100033 interval with taking into account the neutron spectrum 4008900100034 are given 4008900100035 HISTORY (19731204C) Compiled at the centre 4008900100036 (19750210U) N1 in BIB record corrected 4008900100037 (20060420U) M.M. Reference was corrected. 4008900100038 Dates were corrected for 4-digits year. 4008900100039 Uppercase corrected. DETECTOR codes were corrected. 4008900100040 Some information was added in Sub.001 and .002 . 4008900100041 (20111020A) M.M. Volume number was added in reference. 4008900100042 ERR-ANALYS (DATA-ERR) No information available 4008900100043 ENDBIB 41 0 4008900100044 NOCOMMON 0 0 4008900100045 ENDSUBENT 44 0 4008900199999 SUBENT 40089002 20060420 41384008900200001 BIB 2 2 4008900200002 REACTION (92-U-235(N,ABS),,ALF,,AV) 4008900200003 STATUS From Table 1. 4008900200004 ENDBIB 2 0 4008900200005 NOCOMMON 0 0 4008900200006 DATA 4 16 4008900200007 EN-MIN EN-MAX DATA DATA-ERR 4008900200008 EV EV NO-DIM NO-DIM 4008900200009 1.0000E+01 2.0000E+01 9.6000E-01 2.0000E-02 4008900200010 2.0000E+01 3.0000E+01 9.2000E-01 3.0000E-02 4008900200011 3.0000E+01 4.0000E+01 8.1000E-01 3.0000E-02 4008900200012 4.0000E+01 5.0000E+01 7.3000E-01 4.0000E-02 4008900200013 5.0000E+01 6.0000E+01 5.3000E-01 3.0000E-02 4008900200014 6.0000E+01 8.0000E+01 5.5000E-01 5.0000E-02 4008900200015 8.0000E+01 1.0000E+02 6.0000E-01 4.0000E-02 4008900200016 1.0000E+02 2.0000E+02 6.5000E-01 3.0000E-02 4008900200017 2.0000E+02 3.0000E+02 5.5000E-01 3.0000E-02 4008900200018 3.0000E+02 4.0000E+02 6.3000E-01 6.0000E-02 4008900200019 4.0000E+02 6.0000E+02 3.8000E-01 3.0000E-02 4008900200020 6.0000E+02 8.0000E+02 5.1000E-01 5.0000E-02 4008900200021 8.0000E+02 1.0000E+03 6.4000E-01 8.0000E-02 4008900200022 1.0000E+03 2.0000E+03 4.6000E-01 5.0000E-02 4008900200023 2.0000E+03 3.0000E+03 6.4000E-01 7.0000E-02 4008900200024 3.0000E+03 5.0000E+03 5.0000E-01 8.0000E-02 4008900200025 ENDDATA 18 0 4008900200026 ENDSUBENT 25 0 4008900299999 ENDENTRY 2 0 4008999999999