ENTRY 20037 20190117 22742003700000001 SUBENT 20037001 20190117 22742003700100001 BIB 9 17 2003700100002 TITLE Prompt nu-bar in spontaneous and neutron induced 2003700100003 fission of U-236 and its half-life for spontaneous 2003700100004 fission 2003700100005 AUTHOR (H.Conde,M.Holmberg) 2003700100006 INSTITUTE (2SWDFOA) 2003700100007 REFERENCE (J,JNE,25,331,1971) Main reference. 2003700100008 (C,69VIENNA,,928,1969) 2003700100009 METHOD (COINC) Coincidences between fission neutrons and 2003700100010 fission fragments. 2003700100011 MONITOR (98-CF-252(0,F),PR,NU) 2003700100012 MONIT-REF (,G.C.Hanna+,J,REA,7,(4),3,1969) 2003700100013 ERR-ANALYS (DATA-ERR) No information given. 2003700100014 HISTORY (19710524T) From NEUDADA file 2003700100015 (19800825A) converted to reaction formalism and updated2003700100016 with main reference. 2003700100017 (20190117U) SD:Updated to new date formats,lower case. 2003700100018 Ref. corrected. MONIT-REF added. 2003700100019 ENDBIB 17 0 2003700100020 COMMON 1 3 2003700100021 MONIT 2003700100022 PRT/FIS 2003700100023 3.756 2003700100024 ENDCOMMON 3 0 2003700100025 ENDSUBENT 24 0 2003700199999 SUBENT 20037002 20190117 22742003700200001 BIB 9 26 2003700200002 REACTION (92-U-236(N,F),PR,NU) 2003700200003 FACILITY (VDG,2SWDAE ) 5.5 MeV Van de Graaff at Studsvik. 2003700200004 INC-SOURCE (P-LI7) Proton-lithium 7 2003700200005 (P-T) proton-tritium. 2003700200006 (D-D) Deuteron-deuterium. 2003700200007 SAMPLE 742 mg of U-236 was electrolytically deposited on 2003700200008 both sides of four platinum cylinders with a coating 2003700200009 thickness of about 1.1 mg/cm2. 2003700200010 Isotopic composition was 0.004% U-234, 0.740% U-235, 2003700200011 98.73% U-236 and 0.52% U-238. 2003700200012 DETECTOR (STANK) A cylindrical scintillator tank. 2003700200013 (FISCH) Fission chamber placed at center of the 2003700200014 scintillator. 2003700200015 COMMENT .The incident neutron energy spread was +- 15 keV at 2003700200016 1 MeV. 2003700200017 CORRECTION .For, 2003700200018 - spontaneous fission (+0.3%) 2003700200019 - thermal induced fission (+0.2%) 2003700200020 - pile-up (+0.15%) 2003700200021 - different fission neutron spectra (-0.8%) 2003700200022 - false gates (+0.2%) 2003700200023 - fission foil thickness (+0.3%) 2003700200024 STATUS (TABLE) Table 3 from J.Nucl.Ener.,25(1971)331 2003700200025 HISTORY (19710524T) From NEUDADA file 2003700200026 (19800825A) 2003700200027 (20190117U) SD: BIB updated. NO-DIM -> PRT/FIS. 2003700200028 ENDBIB 26 0 2003700200029 NOCOMMON 0 0 2003700200030 DATA 3 21 2003700200031 EN DATA DATA-ERR 2003700200032 MEV PRT/FIS PRT/FIS 2003700200033 0.77 2.45 0.06 2003700200034 0.82 2.40 0.05 2003700200035 0.88 2.44 0.05 2003700200036 0.98 2.47 0.05 2003700200037 1.08 2.43 0.05 2003700200038 1.29 2.50 0.04 2003700200039 1.50 2.56 0.04 2003700200040 1.69 2.52 0.05 2003700200041 1.90 2.55 0.04 2003700200042 2.21 2.55 0.04 2003700200043 2.29 2.69 0.05 2003700200044 2.51 2.59 0.04 2003700200045 2.59 2.67 0.05 2003700200046 2.79 2.67 0.05 2003700200047 2.99 2.72 0.05 2003700200048 3.29 2.78 0.05 2003700200049 3.79 2.81 0.05 2003700200050 4.17 2.85 0.04 2003700200051 5.50 2.96 0.06 2003700200052 6.20 3.12 0.04 2003700200053 6.70 3.26 0.05 2003700200054 ENDDATA 23 0 2003700200055 ENDSUBENT 54 0 2003700299999 SUBENT 20037003 20190117 22742003700300001 BIB 8 24 2003700300002 REACTION (92-U-236(0,F),PR,NU) 2003700300003 SAMPLE 742 mg of U-236 was electrolytically deposited on 2003700300004 both sides of four platinum cylinders with a coating 2003700300005 thickness of about 1.1 mg/cm2. 2003700300006 Isotopic composition was 0.004% U-234, 0.740% U-235, 2003700300007 98.73% U-236 and 0.52% U-238. 2003700300008 DETECTOR (STANK) A cylindrical scintillator tank. 2003700300009 (FISCH) Fission chamber placed at center of the 2003700300010 scintillator. 2003700300011 PART-DET (PN,FF) Prompt neutrons and fission fragments in 2003700300012 coincidence. 2003700300013 COMMENT .The ratio between the half-lives for spontaneous 2003700300014 fission of 92-U-238 and 92-U-236 was determined to be 2003700300015 0.30+-0.03, resulting in a half-life of 2003700300016 (3.7+-0.7)*1.0E+16 year, using the known half-life of 2003700300017 U-238 (see MONIT-REF). 2003700300018 CORRECTION .For, 2003700300019 - bias setting of fission chamber 2003700300020 - bias setting of scintillator 2003700300021 - loss of fission events in the coincidence circuit 2003700300022 STATUS (TABLE) Table 4 from J.Nucl.Ener.,25(1971)331 2003700300023 HISTORY (19710524T) From NEUDADA file 2003700300024 (19800825A) 2003700300025 (20190117U) SD: BIB updated. NO-DIM -> PRT/FIS. 2003700300026 ENDBIB 24 0 2003700300027 NOCOMMON 0 0 2003700300028 DATA 2 1 2003700300029 DATA DATA-ERR 2003700300030 PRT/FIS PRT/FIS 2003700300031 1.90 0.05 2003700300032 ENDDATA 3 0 2003700300033 ENDSUBENT 32 0 2003700399999 SUBENT 20037004 20190117 22742003700400001 BIB 8 19 2003700400002 REACTION (92-U-238(0,F),PR,NU) 2003700400003 SAMPLE .About 700 Mg U-238 electrolytically deposited on 2003700400004 four platinum cylinders. 2003700400005 DETECTOR (STANK) A spherical scintillator tank. 2003700400006 (FISCH) Fission chamber placed at the center of the 2003700400007 scintillator. 2003700400008 PART-DET (PN,FF) Prompt neutrons and fission fragments in 2003700400009 coincidence. 2003700400010 COMMENT .The ratio between the half-lives for spontaneous 2003700400011 fission of 92-U-238 and 92-U-236 was determined to be 2003700400012 0.30+-0.03. 2003700400013 CORRECTION .For, 2003700400014 - bias setting of fission chamber 2003700400015 - bias setting of scintillator 2003700400016 - loss of fission events in the coincidence circuit 2003700400017 STATUS (TABLE) Table 4 from J.Nucl.Ener.,25(1971)331 2003700400018 HISTORY (19710524T) From NEUDADA file 2003700400019 (19800825A) 2003700400020 (20190117U) SD: BIB updated. NO-DIM -> PRT/FIS. 2003700400021 ENDBIB 19 0 2003700400022 NOCOMMON 0 0 2003700400023 DATA 2 1 2003700400024 DATA DATA-ERR 2003700400025 PRT/FIS PRT/FIS 2003700400026 2.00 0.05 2003700400027 ENDDATA 3 0 2003700400028 ENDSUBENT 27 0 2003700499999 ENDENTRY 4 0 2003799999999