ENTRY 20075 20190925 22832007500000001 SUBENT 20075001 20190925 22832007500100001 BIB 14 41 2007500100002 TITLE Nu-bar of U-238 from 1.5 to 15 MeV 2007500100003 AUTHOR (I.Asplund-Nilsson,H.Conde,N.Starfelt) 2007500100004 REFERENCE (J,NSE,20,527,1964) Final publication. 2007500100005 (R,FOA4-A-4246-411,1962) Preliminary report. 2007500100006 ((R,FOA4-A-4368-411,1964)=(R,EANDC(OR)-31,1964)) 2007500100007 Preliminary reports. 2007500100008 INSTITUTE (2SWDFOA) 2007500100009 FACILITY (CCW,2SWDFOA) Cockcroft-Walton accelerator for 14.8 MeV2007500100010 (VDG,2SWDAE ) 5.5 MeV accelerator at Studsvik for all 2007500100011 other energies. 2007500100012 INC-SOURCE (P-T) T(p,n)He3 reaction up to 3.5 MeV neutrons 2007500100013 (D-D) D(d,n)He3 reactions from 4.5 to 7.5 MeV 2007500100014 (D-T) T(d,n)He4 reaction for 14.8 MeV neutrons 2007500100015 SAMPLE 140 mg of U-238 was painted on five platinum plates 2007500100016 with a thickness of about 4 mg/cm2. 2007500100017 METHOD (COINC) Coincidences between fission fragments and 2007500100018 prompt neutrons. 2007500100019 DETECTOR (STANK) Cylindrical liquid scintillation detector 2007500100020 (50 cm in diam, and 50 cm in length) except for 2007500100021 14.8 MeV neutrons where the shape was 2007500100022 spherical (60 cm in diam.). 2007500100023 (FISCH) Fission chamber in the center of the 2007500100024 cylindrical scintillator tank. 2007500100025 MONITOR (98-CF-252(0,F),PR,NU) 2007500100026 COMMENT A least square fit to the present results yields 2007500100027 nu-bar(En) = 2.313 + 0.154*En above the threshold for 2007500100028 fission, where 'En' is the neutron energy. 2007500100029 CORRECTION For pile up (1.5%), subtraction of background, 2007500100030 Spontaneous fission of U-238 (1%), 2007500100031 Random coincidences (less then 0.2%) 2007500100032 Variation of the detection efficiency (0.5%) 2007500100033 Escape of neutrons to the axial tube of the tank(0.5%)2007500100034 Fission caused by neutrons which had lost energy in 2007500100035 the collimator (1 to 2.5%) 2007500100036 The anisotropy correction was less than 0.2%. 2007500100037 ERR-ANALYS (ERR-S) The stated errors are due to counting 2007500100038 statistics only 2007500100039 HISTORY (19710524T) From NEUDADA file 2007500100040 (19800825A) converted to reaction formalism. 2007500100041 (20190925U) SD:Updated to new date formats,lower case. 2007500100042 BIB updated. 2007500100043 ENDBIB 41 0 2007500100044 COMMON 1 3 2007500100045 MONIT 2007500100046 PRT/FIS 2007500100047 3.775 2007500100048 ENDCOMMON 3 0 2007500100049 ENDSUBENT 48 0 2007500199999 SUBENT 20075002 20190925 22832007500200001 BIB 4 7 2007500200002 REACTION (92-U-238(N,F),PR,NU) 2007500200003 PART-DET (PN,FF) Prompt neutrons and fission fragments in 2007500200004 coincidence. 2007500200005 STATUS (TABLE) Table 1 from Nucl.Sci.Eng.,20(1964)527 2007500200006 HISTORY (19710524T) From NEUDADA file 2007500200007 (19800825A) 2007500200008 (20190925U) SD: DATA-ERR -> ERR-S. 2007500200009 ENDBIB 7 0 2007500200010 NOCOMMON 0 0 2007500200011 DATA 4 9 2007500200012 EN EN-RSL DATA ERR-S 2007500200013 MEV MEV PRT/FIS PRT/FIS 2007500200014 1.49 0.01 2.520 0.056 2007500200015 2.40 0.01 2.671 0.051 2007500200016 3.50 0.02 2.864 0.049 2007500200017 4.88 0.05 3.068 0.049 2007500200018 5.63 0.15 3.159 0.059 2007500200019 6.32 0.06 3.269 0.059 2007500200020 6.83 0.06 3.379 0.054 2007500200021 7.45 0.05 3.518 0.053 2007500200022 14.8 0.2 4.563 0.067 2007500200023 ENDDATA 11 0 2007500200024 ENDSUBENT 23 0 2007500299999 ENDENTRY 2 0 2007599999999