ENTRY 40546 20191213 41854054600000001 SUBENT 40546001 20191213 41854054600100001 BIB 9 23 4054600100002 INSTITUTE (4RUSRI) 4054600100003 REFERENCE (J,AE,46,416,1979) Issue 6 4054600100004 (J,SJA,46,475,1979) Engl.transl.of J,AE,46,416,1979 4054600100005 AUTHOR (B.M.Aleksandrov,Yu.A.Nemilov,Yu.A.Selitskii, 4054600100006 S.M.Solov'ev, V.B.Funshtein,S.V.Khlebnikov, 4054600100007 B.M.Shiryaev) 4054600100008 TITLE Absolute measurements of the cross-section for the 4054600100009 fission of 241Am by 2.5-MeV neutrons 4054600100010 FACILITY (LINAC,4RUSRI) Low-voltage accelerator 4054600100011 INC-SOURCE (D-D) D(d,n)He-3, 70-80 keV deuteron beam 4054600100012 DETECTOR (SOLST) Surface-barrier Si semiconductor detector 4054600100013 for accompanying hellion detection 4054600100014 (SOLST) Mica detector for fission fragments detection.4054600100015 96 % efficiency. 4054600100016 METHOD (ASSOP) 4054600100017 HISTORY (19800405C) 4054600100018 (20180325U) M.M. Upper -> lower case correction. 4054600100019 Dates were corrected for 4-digits year. 4054600100020 Ref. SJA,46,475,1979 was added. 4054600100021 STATUS, BIB information was added 4054600100022 (20191213A) Code NCHKD was deleted. 4054600100023 Subent 002 was corrected. 4054600100024 BIB information was updated . 4054600100025 ENDBIB 23 0 4054600100026 COMMON 1 3 4054600100027 EN 4054600100028 MEV 4054600100029 2.5 4054600100030 ENDCOMMON 3 0 4054600100031 ENDSUBENT 30 0 4054600199999 SUBENT 40546002 20191213 41854054600200001 BIB 9 32 4054600200002 REACTION (95-AM-241(N,F),,SIG) 4054600200003 DECAY-DATA (95-AM-241,432.7YR) 432.7+-0.6 yr. 4054600200004 SAMPLE Thin film, Pu-239 content 0.5 % , mass = 2754+-25 4054600200005 microgram, thickness < 300 microgram/cm2 4054600200006 MONITOR U-238 and U-238 were monitors. 4054600200007 CORRECTION - spontaneous fission of target - 1.9+-0.2 % , 4054600200008 - on mica detector insensitivity to small-angle 4054600200009 fragments - 4+-1 % , 4054600200010 - He-3 separation from complete spectrum = 1.5+-1.0 % ,4054600200011 - target non-spherical shape = 1.5+-0.2 % , 4054600200012 - fission by scattered neutrons - 3+-1 % , 4054600200013 - Pu-239 impurity - 0.5+-0.1 % , 4054600200014 - geometry and neutrons angular distribution - 4054600200015 0.3+-0.1 % . 4054600200016 REL-REF (A,40636008,M.L.Kazarinova+,J,AE,8,139,1960) 4054600200017 1.95+-0.2 b 4054600200018 (A,12572010,C.Bowman+,J,PR,166,1219,1968) 4054600200019 1.96+-0.2 b 4054600200020 (A,40012010,E.F.Fomushkin+,J,YF,10,917,1969) 4054600200021 2.05+-0.07 b 4054600200022 (A,40010002,D.L.Shpak+,R,YFI-8,4,1969) 4054600200023 1.9+-0.1 b 4054600200024 ERR-ANALYS (ERR-S) Statistical error 4054600200025 (ERR-1) Error in determining of distance from neutron 4054600200026 source to sample. 4054600200027 (ERR-T) Total error 4054600200028 STATUS (TABLE) Text, p.475 of J.Sov.At.Energy,v.46,p.475,1979 4054600200029 (DEP,40546003) U-235 CS 4054600200030 (DEP,40546003) U-238 CS 4054600200031 HISTORY (20191213A) CORRECTION lines were moved from Subent 0014054600200032 and corrected. 4054600200033 ERR-1, REL-REFs were added. 4054600200034 ENDBIB 32 0 4054600200035 COMMON 1 3 4054600200036 ERR-HL 4054600200037 YR 4054600200038 0.6 4054600200039 ENDCOMMON 3 0 4054600200040 DATA 4 1 4054600200041 DATA ERR-T ERR-S ERR-1 4054600200042 B B PER-CENT PER-CENT 4054600200043 1.98 0.07 2.2 1.7 4054600200044 ENDDATA 3 0 4054600200045 ENDSUBENT 44 0 4054600299999 SUBENT 40546003 20191213 41854054600300001 BIB 6 8 4054600300002 REACTION (92-U-235(N,F),,SIG) 4054600300003 SAMPLE Natural U and U-235 20 mm in diameter placed in 4054600300004 briquette with Am targets 4054600300005 REL-REF (A,40258002,I.M.Kuks+,C,73KIEV,4,18,1973) 4054600300006 And YFI-17,33,1974 4054600300007 ERR-ANALYS (DATA-ERR) Total error 4054600300008 STATUS (TABLE) Text, p.475 of J.Sov.At.Energy,v.46,p.475,1979 4054600300009 HISTORY (20191213U) Sample information was updated 4054600300010 ENDBIB 8 0 4054600300011 NOCOMMON 0 0 4054600300012 DATA 2 1 4054600300013 DATA DATA-ERR 4054600300014 B B 4054600300015 1.27 0.05 4054600300016 ENDDATA 3 0 4054600300017 ENDSUBENT 16 0 4054600399999 SUBENT 40546004 20191213 41854054600400001 BIB 7 8 4054600400002 REACTION (92-U-238(N,F),,SIG) 4054600400003 SAMPLE Natural U and U-235 20 mm in diameter placed in 4054600400004 briquette with Am targets 4054600400005 COMMENT In reference erroneously given U-239 4054600400006 REL-REF (A,40081002,I.M.Kuks+,J,SJA,30,64,1971) 4054600400007 ERR-ANALYS (DATA-ERR) Total error 4054600400008 STATUS (TABLE) Text, p.475 of J.Sov.At.Energy,v.46,p.475,1979 4054600400009 HISTORY (20191213U) Sample information was updated 4054600400010 ENDBIB 8 0 4054600400011 NOCOMMON 0 0 4054600400012 DATA 2 1 4054600400013 DATA DATA-ERR 4054600400014 B B 4054600400015 0.52 0.02 4054600400016 ENDDATA 3 0 4054600400017 ENDSUBENT 16 0 4054600499999 ENDENTRY 4 0 4054699999999