ENTRY 41499 20070821 41414149900000001 SUBENT 41499001 20070821 41414149900100001 BIB 12 36 4149900100002 REFERENCE (J,AE,102,(3),189,2007) 4149900100003 (J,AE/T,102,(3),232,2007)Engl.translation of AE,102,1894149900100004 TITLE Determination of Pu-240 spontaneous fission products 4149900100005 yields. 4149900100006 AUTHOR (A.V.Bushuev, V.N.Zubarev, A.F.Kozhin, E.V.Petrova, 4149900100007 T.K.Ragimov, A.M.Petrov, G.N.Vlaskin, V.I.Timonin, 4149900100008 A.A.Samoylov) 4149900100009 INSTITUTE (4RUSMIF) - Bushuev, Zubarev, Kozhin, Petrova 4149900100010 (4RUSRUS) Institute of nonorganic materials 4149900100011 - Ragimov, Petrov, Vlaskin, Timonin, Samoylov4149900100012 SAMPLE Two samples of metallic plutonium as sphere covered 4149900100013 twice by stainless steel of 2mm thickness: 4149900100014 1. Mass - 82.93g, Radius - 1.05 cm. 4149900100015 2. Mass - 41.46g, Radius - 0.83cm. 4149900100016 Content: Pu-238 < 1.E-4%, Pu-239 - (7.86 +- 0.01)%, 4149900100017 Pu-240 - (91.07 +- 0.01)%, Pu-241 - (0.88 +- 0.01)%, 4149900100018 Pu-242 - (0.17 +- 0.01)%. 4149900100019 Am-241 content - about 3% of plutonium mass. 4149900100020 DETECTOR (GE) Coaxial germanium detector, protected by borated 4149900100021 polyethylene (40mm), lead (4mm) and cadmium (2mm).4149900100022 Efficiency - 60%, resolution - 1.9 keV for 4149900100023 E-gamma=1332 keV. 4149900100024 Energy dependence of detector efficiency was defined 4149900100025 by Eu-152 and Ra-226 sources. 4149900100026 METHOD (GSPEC) 4149900100027 ANALYSIS The spontaneous fission yields are calculated by 4149900100028 ratio of counts in gamma-peaks of fission products and4149900100029 counts in peak og 642. keV gamma-ray of Pu-240. 4149900100030 CORRECTION Corrections for: 4149900100031 - Self-Absorption of gamma-rays of Pu-240 and fission 4149900100032 products , 4149900100033 - Initiated fission, 4149900100034 - Spontaneous fission of other isotopes - 0.995%. 4149900100035 ERR-ANALYS (DATA-ERR) Errors are not specified. 4149900100036 STATUS (TABLE) Table of Reference. 4149900100037 HISTORY (20070821C) Compiled at CJD. M.M. 4149900100038 ENDBIB 36 0 4149900100039 NOCOMMON 0 0 4149900100040 ENDSUBENT 39 0 4149900199999 SUBENT 41499002 20070821 41414149900200001 BIB 3 17 4149900200002 REACTION (94-PU-240(0,F)ELEM/MASS,IND,FY) 4149900200003 Yields of Pu-240 Spontaneous fission 4149900200004 DECAY-DATA (94-PU-240,,DG,642.4) 4149900200005 (37-RB-94,,DG,1309.,0.871) 4149900200006 (38-SR-92,,DG,1383.,0.90) 4149900200007 (38-SR-94,,DG,1428.,0.942) 4149900200008 (39-Y-96-M,,DG,1107.,0.481,DG,1751.,0.882) 4149900200009 (51-SB-132,,DG,973.9) 4149900200010 (51-SB-133,,DG,1096.,0.430,DG,1132.,0.226) 4149900200011 (53-I-134,,DG,847.1,,DG,1072.6) 4149900200012 (53-I-135,,DG,1260.,0.287,DG,1796.,0.077) 4149900200013 (53-I-136,,DG,1321.,0.248) 4149900200014 (54-XE-138,,DG,1768.,0.167) 4149900200015 (55-CS-138-G,,DG,1436.,0.763) 4149900200016 (55-CS-138-M,,DG,1436.,0.190) 4149900200017 (57-LA-140,,DG,1596.,0.954) 4149900200018 FLAG (1.) Yield for sum Cs-138-g + Cs-138-m 4149900200019 ENDBIB 17 0 4149900200020 NOCOMMON 0 0 4149900200021 DATA 6 10 4149900200022 ELEMENT MASS ISOMER DATA DATA-ERR FLAG 4149900200023 NO-DIM NO-DIM NO-DIM PC/FIS PC/FIS NO-DIM 4149900200024 37. 94. 1.23 0.04 4149900200025 38. 92. 2.92 0.14 4149900200026 38. 94. 3.94 0.06 4149900200027 39. 96. 1. 1.13 0.16 4149900200028 51. 133. 3.26 0.18 4149900200029 53. 135. 8.13 0.15 4149900200030 53. 136. 3.65 0.40 4149900200031 54. 138. 7.60 0.29 4149900200032 55. 138. 6.85 0.18 1. 4149900200033 57. 140. 5.70 0.18 4149900200034 ENDDATA 12 0 4149900200035 ENDSUBENT 34 0 4149900299999 ENDENTRY 2 0 4149999999999