ENTRY 14595 20200130 14671459500000001 SUBENT 14595001 20200130 14671459500100001 BIB 11 32 1459500100002 TITLE Correlation of mass, energy, and angle in 1459500100003 MeV-neutron-induced fission of U235 and U238 1459500100004 AUTHOR (J.W.Meadows) 1459500100005 REFERENCE (J,PR,177,1817,1969) 1459500100006 #doi:10.1103/PhysRev.177.1817 1459500100007 INSTITUTE (1USAANL) 1459500100008 FACILITY (VDG,1USAANL) 3-MeV Van de Graaff generator. 1459500100009 INC-SOURCE (D-D) Neutrons produced by the D(d,n)He3 reaction 1459500100010 using deuterium gas. 1459500100011 (P-LI7) Neutrons produced by the Li7(p,n)Be7 reaction 1459500100012 using thin lithium metal target. 1459500100013 INC-SPECT The neutron energy spreads were about of 100 keV from 1459500100014 the gas targets and about of 50 keV from the metal 1459500100015 targets. 1459500100016 Thermal neutrons were obtained by encasing the detector1459500100017 chamber in about 4 in. of paraffin. 1459500100018 SAMPLE The uranium samples were 1 cm in diameter and had a 1459500100019 surface density of about 120 mu-g/cm2. The U235 1459500100020 samples were made by evaporating uranium metal 1459500100021 enriched to about 93% onto 130 mu-g/cm2 nickel foils. 1459500100022 The U238 samples were made in a similar manner, using 1459500100023 uranium metal containing about 0.2% U235. 1459500100024 DETECTOR (SIBAR) Four or two (to measure U238 fission at 1459500100025 1.5 MeV) silicon surface barrier detectors having 1459500100026 room-temperature resistivities in the vicinity of 1459500100027 500 ohm-cm. The active areas were 4 cm2 for the common 1459500100028 detectors (placed on each side of the uranium sample) 1459500100029 and 3 cm2 for the others. The edges of the detectors 1459500100030 shielded by aluminum collimators whose inside edges 1459500100031 were rounded. 1459500100032 METHOD (EXTB) 1459500100033 HISTORY (20200130C) OG. 1459500100034 ENDBIB 32 0 1459500100035 NOCOMMON 0 0 1459500100036 ENDSUBENT 35 0 1459500199999 SUBENT 14595002 20200130 14671459500200001 BIB 4 10 1459500200002 REACTION 1(92-U-235(N,F),PRV,AP,LF) 1459500200003 2(92-U-235(N,F),PRV,AP,HF) 1459500200004 ERR-ANALYS No information on uncertainties. 1459500200005 MISC-COL (MISC1) The average angles of the fission fragments 1459500200006 detected. Resolution of the average angles (full 1459500200007 widths at half maximum) for 7, 45, and 90 degrees were 1459500200008 4, 7, and 9 degrees, respectively. 1459500200009 (MISC2) The variance of the provisional mass 1459500200010 distribution 1459500200011 STATUS (TABLE) Table I (p.1820) in Phys.Rev,177,1817,1969. 1459500200012 ENDBIB 10 0 1459500200013 NOCOMMON 0 0 1459500200014 DATA 5 12 1459500200015 EN DATA 1DATA 2MISC1 MISC2 1459500200016 MEV NO-DIM NO-DIM ADEG NO-DIM 1459500200017 0.0253E-6 97.2 139.1 7. 34.7 1459500200018 0.0253E-6 97.2 139.1 45. 33.5 1459500200019 0.0253E-6 97.4 139.1 90. 34.9 1459500200020 0.12 97.2 138.9 7. 35.0 1459500200021 0.12 97.5 138.6 45. 33.4 1459500200022 0.12 97.8 138.7 90. 35.0 1459500200023 0.5 97.3 138.8 7. 35.7 1459500200024 0.5 97.5 138.4 45. 33.6 1459500200025 0.5 97.0 138.7 90. 35.4 1459500200026 6.0 98.0 138.6 7. 46.5 1459500200027 6.0 98.0 138.6 45. 45.6 1459500200028 6.0 97.9 138.2 90. 46.1 1459500200029 ENDDATA 14 0 1459500200030 ENDSUBENT 29 0 1459500299999 SUBENT 14595003 20200130 14671459500300001 BIB 4 11 1459500300002 REACTION 1(92-U-235(N,F),SEC,AKE,LF) 1459500300003 2(92-U-235(N,F),SEC,AKE,HF) 1459500300004 3(92-U-235(N,F),SEC,AKE,LF+HF) 1459500300005 ERR-ANALYS (DATA-ERR) The energies are measured relative to the 1459500300006 U235 thermal-neutron fission spectrum, and the errors 1459500300007 are relative to this standard. 1459500300008 MISC-COL (MISC) The average angles of the fission fragments 1459500300009 detected. Resolution of the average angles (full 1459500300010 widths at half maximum) for 7, 45, and 90 degrees were 1459500300011 4, 7, and 9 degrees, respectively. 1459500300012 STATUS (TABLE) Table I (p.1820) in Phys.Rev,177,1817,1969. 1459500300013 ENDBIB 11 0 1459500300014 NOCOMMON 0 0 1459500300015 DATA 8 12 1459500300016 EN DATA 1DATA-ERR 1DATA 2DATA-ERR 2DATA 31459500300017 DATA-ERR 3MISC 1459500300018 MEV MEV MEV MEV MEV MEV 1459500300019 MEV ADEG 1459500300020 0.0253E-6 100.2 70.3 170.5 1459500300021 7. 1459500300022 0.0253E-6 100.2 70.2 170.4 1459500300023 45. 1459500300024 0.0253E-6 100.2 70.4 170.6 1459500300025 90. 1459500300026 0.12 99.8 0.2 70.1 0.3 170.0 1459500300027 0.4 7. 1459500300028 0.12 99.8 0.2 70.3 0.3 170.2 1459500300029 0.4 45. 1459500300030 0.12 100.2 0.2 70.3 0.3 170.5 1459500300031 0.4 90. 1459500300032 0.5 99.8 0.3 70.1 0.3 169.9 1459500300033 0.4 7. 1459500300034 0.5 99.8 0.3 70.5 0.3 170.3 1459500300035 0.4 45. 1459500300036 0.5 100.0 0.3 70.3 0.3 170.3 1459500300037 0.4 90. 1459500300038 6.0 99.0 0.1 70.2 0.2 169.2 1459500300039 0.2 7. 1459500300040 6.0 98.9 0.1 70.1 0.2 169.0 1459500300041 0.2 45. 1459500300042 6.0 99.1 0.1 70.4 0.2 169.5 1459500300043 0.2 90. 1459500300044 ENDDATA 28 0 1459500300045 ENDSUBENT 44 0 1459500399999 SUBENT 14595004 20200130 14671459500400001 BIB 4 11 1459500400002 REACTION 1(92-U-238(N,F),PRV,AP,LF) 1459500400003 2(92-U-238(N,F),PRV,AP,HF) 1459500400004 ERR-ANALYS No information on uncertainties. 1459500400005 MISC-COL (MISC1) The average angles of the fission fragments 1459500400006 detected. For E=5.6 MeV resolution of the average 1459500400007 angles (full widths at half maximum) for 7, 45, and 90 1459500400008 degrees were 4, 7, and 9 degrees, respectively. For 1459500400009 E=1.5 MeV the resolution was not given. 1459500400010 (MISC2) The variance of the provisional mass 1459500400011 distribution 1459500400012 STATUS (TABLE) Table I (p.1820) in Phys.Rev,177,1817,1969. 1459500400013 ENDBIB 11 0 1459500400014 NOCOMMON 0 0 1459500400015 DATA 5 5 1459500400016 EN DATA 1DATA 2MISC1 MISC2 1459500400017 MEV NO-DIM NO-DIM ADEG NO-DIM 1459500400018 1.5 100.2 139.0 7. 37.0 1459500400019 1.5 99.9 138.9 80. 37.0 1459500400020 5.6 99.9 138.9 7. 43.4 1459500400021 5.6 99.6 139.0 45. 42.4 1459500400022 5.6 99.6 139.2 90. 42.8 1459500400023 ENDDATA 7 0 1459500400024 ENDSUBENT 23 0 1459500499999 SUBENT 14595005 20200130 14671459500500001 BIB 4 11 1459500500002 REACTION 1(92-U-238(N,F),SEC,AKE,LF) 1459500500003 2(92-U-238(N,F),SEC,AKE,HF) 1459500500004 3(92-U-238(N,F),SEC,AKE,LF+HF) 1459500500005 ERR-ANALYS (DATA-ERR) The energies are measured relative to the 1459500500006 U235 thermal-neutron fission spectrum, and the errors 1459500500007 are relative to this standard. 1459500500008 MISC-COL (MISC) The average angles of the fission fragments 1459500500009 detected. Distribution of the average angles (full 1459500500010 widths at half maximum) for 7, 45, and 90 degrees were 1459500500011 4, 7, and 9 degrees, respectively. 1459500500012 STATUS (TABLE) Table I (p.1820) in Phys.Rev,177,1817,1969. 1459500500013 ENDBIB 11 0 1459500500014 NOCOMMON 0 0 1459500500015 DATA 8 5 1459500500016 EN DATA 1DATA-ERR 1DATA 2DATA-ERR 2DATA 31459500500017 DATA-ERR 3MISC 1459500500018 MEV MEV MEV MEV MEV MEV 1459500500019 MEV ADEG 1459500500020 1.5 99.0 0.7 71.2 0.7 170.2 1459500500021 1.0 7. 1459500500022 1.5 99.2 0.7 71.6 0.7 170.8 1459500500023 1.0 80. 1459500500024 5.6 97.7 0.5 70.2 0.5 167.9 1459500500025 0.7 7. 1459500500026 5.6 97.8 0.5 70.3 0.5 168.1 1459500500027 0.7 45. 1459500500028 5.6 97.2 0.5 69.9 0.5 167.0 1459500500029 0.7 90. 1459500500030 ENDDATA 14 0 1459500500031 ENDSUBENT 30 0 1459500599999 ENDENTRY 5 0 1459599999999