ENTRY 41526 20200720 41884152600000001 SUBENT 41526001 20200720 41884152600100001 BIB 11 54 4152600100002 TITLE Investigation of resonance structure of neutron cross 4152600100003 sections by time-of-flight spectrometers with pulse 4152600100004 neutron sources of Moscow Meson Facility. 4152600100005 AUTHOR (A.A.Bergman, A.I.Berlev, Yu.V.Grigoriev) 4152600100006 INSTITUTE (4RUSJIA) A.A.Bergman, A.I.Berlev 4152600100007 (4RUSFEI) Yu.V.Grigor'ev( = Yu.V.Grigoriev) 4152600100008 REFERENCE (R,JIA-1225,200905) Main reference. 4152600100009 FACILITY (LINAC,4RUSJIA) REPS (Resonance Experimental 4152600100010 Transmissions and Cross-sections) exp.setup of Meson 4152600100011 Facility at Institute for Nuclear Research of Russian 4152600100012 Academy of Science. 4152600100013 INC-SOURCE1 Pulse neutron source RADEX (Radiational experiments). 4152600100014 W target of several layers of natural tungsten of 4152600100015 total thickness 7 cm, cooled by water. 4152600100016 Proton beam: energy 209 MeV, pulse current 5-10 mA, 4152600100017 frequency 1-50 Hz, pulse duration 1-200 microsec. 4152600100018 2 Natural Rb target of 6 cm thickness cooled by water 4152600100019 and Ge target of 1 mm diameter, 10mm*10mm size . 4152600100020 Proton energy 147 (160) MeV, pulse current 5-1 mA, 4152600100021 frequency 1-50 Hz, pulse duration 1-200 microsec. 4152600100022 DETECTOR 1(SCIN) Eight-sections liquid scintillator . 4152600100023 Registration efficiency of Co-60 gamma-rays about 30% 4152600100024 at energy resolution about 30%. 4152600100025 (PROPC) He-3 counter . Registration efficiency of 4152600100026 thermal neutrons about 95%. 4152600100027 Other He-3 proportional counter SNM-18 for neutron 4152600100028 source intensity monitoring at 114m flight base. 4152600100029 Resonance filters of Al (35 keV), Mn (2.4 keV), 4152600100030 W (20 eV) - for background measurement. 4152600100031 2(BF3) B-10 counter SNM-13 at 12 m flight base for 4152600100032 neutron beam intensity monitoring. 4152600100033 (PROPC) He-3 counter SNM-18 . 4152600100034 Registration efficiency of thermal neutrons about 94 %4152600100035 (FISCH) Fission ionization chamber with layers of 4152600100036 Pu-240 and U-235. 4152600100037 METHOD 1(TOF) Flight path 50. m . 4152600100038 2 Flight path about 18m at Isotope Complex facility4152600100039 SAMPLE Thin metallic / oxides (MnO2) disks from Mn-55, Nb-93 4152600100040 ( 2mm diameter), Sm-148, Ho-165 (5mm diameter), Ta-1814152600100041 (0.2 mm diameter), Mo (natural, 0.4 mm diameter), 4152600100042 In (0.5 mm diameter), W, U-238 of 50-80 mm 4152600100043 diameter and different thickness. 4152600100044 U-238 oxide (99.9%) of 0.22 g/cm**2 thickness,in Al bo4152600100045 of 48 mm diameter. 4152600100046 Pu-240 sample (test experiment) of isotopic relative 4152600100047 content: 4152600100048 Pu-240 - 287 microg, 4152600100049 Pu-239 - (3.6+-0.005)*10**-4, 4152600100050 Pu-241 - (2.67+-0.03)*10**-3, 4152600100051 Pu-242 - (4.4 +- 0.2)*10**-5, 4152600100052 Pu-244 < 10**-6 . 4152600100053 MONITOR (92-U-238(N,G)92-U-239,,SIG) 4152600100054 HISTORY (20090810C) Compiled at CJD. M.M. 4152600100055 (20200720U) MESON -> LINAC 4152600100056 ENDBIB 54 0 4152600100057 NOCOMMON 0 0 4152600100058 ENDSUBENT 57 0 4152600199999 SUBENT 41526002 20090810 41474152600200001 BIB 4 6 4152600200002 REACTION (25-MN-55(N,0),,EN) Capture resonances. 4152600200003 Measured at 50 m flight path. 4152600200004 SAMPLE Mn-55 of 2 mm diameter. 4152600200005 COMMENT Of authors. At 2375 eV energy there are more than two 4152600200006 resonances. 4152600200007 STATUS Text of P,JIA-1225, page 6 . 4152600200008 ENDBIB 6 0 4152600200009 NOCOMMON 0 0 4152600200010 DATA 1 3 4152600200011 DATA 4152600200012 EV 4152600200013 228. 4152600200014 359.4 4152600200015 375.2 4152600200016 ENDDATA 5 0 4152600200017 ENDSUBENT 16 0 4152600299999 SUBENT 41526003 20090810 41474152600300001 BIB 4 6 4152600300002 REACTION (74-W-0(N,0),,EN) Capture resonances. 4152600300003 Measured at 50 m flight path. 4152600300004 SAMPLE Mn-55 of 2 mm diameter. 4152600300005 COMMENT Of authors. at 2375 eV energy there are more than two 4152600300006 resonances. 4152600300007 STATUS Text of P,JIA-1225, page 6 . 4152600300008 ENDBIB 6 0 4152600300009 NOCOMMON 0 0 4152600300010 DATA 1 2 4152600300011 DATA 4152600300012 EV 4152600300013 4. 4152600300014 18. 4152600300015 ENDDATA 4 0 4152600300016 ENDSUBENT 15 0 4152600399999 ENDENTRY 3 0 4152699999999