ENTRY 21062 20170802 22632106200000001 SUBENT 21062001 20170802 22632106200100001 BIB 14 51 2106200100002 INSTITUTE (2UK HAR) AERE Harwell. 2106200100003 (2UK OXF) Oxford Univ, Clarendon lab. A.L. 2106200100004 (2GERMNZ) University of Mainz. H.A. 2106200100005 REFERENCE (J,NP,40,186,1963) 2106200100006 AUTHOR (P.H.Bowen,G.C.Cox,G.B.Huxtable,J.P.Scanlon, 2106200100007 J.J.Thresher,A.Langsford,H.Appel) 2106200100008 TITLE Small angle elastic scattering of neutrons by 2106200100009 uranium at energies between 18 MeV and 120 MeV 2106200100010 FACILITY (SYNCY) Harwell synchrocyclotron and polarized beam 2106200100011 INC-SOURCE (PHOTO) Proton beam on aluminum target, 3.8 cm thick, 2106200100012 producing neutrons at 45 degrees to the proton beam. 2106200100013 INC-SPECT (EN-RSL) - the overall energy resolution was obtained 2106200100014 by combining the width of the energy band with the 2106200100015 intrinsic energy resolution of the spectrometer. 2106200100016 SAMPLE .Natural uranium scatterer, 3.81 cm thick for 2106200100017 all angles, and 2.55 cm thick for 1 degree. 2106200100018 METHOD (TOF) Time of flight spectrometer, 27 m flight path. 2106200100019 DETECTOR (SCIN) Organic liquid scintillator counters. 2106200100020 ANALYSIS .Polarization calculated from observed asymmetries 2106200100021 by least squares fit to the expression. 2106200100022 A(theta) = ( P(theta) + B*theta)p(1.)sin(alpha) 2106200100023 where B*theta represents small angle nuclear 2106200100024 polarizations. 2106200100025 CORRECTION .Corrected for multiple scattering of 15 to 19% 2106200100026 and neutron detection efficiency and intensity. 2106200100027 Because the cross-section for inelastic scattering at 2106200100028 each energy and angle was very much smaller than the 2106200100029 corresponding elastic cross-section, a somewhat crude 2106200100030 estimate of the former was sufficient to enable the 2106200100031 experim. results to be corrected without introducing 2106200100032 appreciable errors. Corrections, which varied from 2106200100033 0.9 +- 0.5 b/sr at 18 MeV to 0.2+-0.1 b/sr at 120 MeV 2106200100034 were deduced from measurements (see REF-REF) on the 2106200100035 production of charged particles from neutron 2106200100036 bombardment at 90 MeV and from measurements (see 2106200100037 REF-REF) of inelastic neutron scattering at 14.5 MeV. 2106200100038 Corrections for the electromagnetic scattering of 2106200100039 neutrons were small, being 2.2, 0.54 and 0.16 b/sr at 2106200100040 1., 2.53 and 4.52 degr., respectively. These values 2106200100041 are slightly energy dependent due to the finite size 2106200100042 of the nucleus but the effects of this dependence are 2106200100043 insignificant in comparison with the errors placed 2106200100044 upon the nuclear cross-sections. 2106200100045 REL-REF (M,,J.Hadley+,J,PR,80,345,1950) at 90. MeV 2106200100046 (M,11322001,J.H.Coon+,J,PR,111,250,1958) at 14. MeV 2106200100047 HISTORY (19790821T) 2106200100048 (19810504A) ERR-ANALYS changed and data corrected. 2106200100049 (20170802A) SD:Updated to new date formats,lower case. 2106200100050 REACTION code corrected in Subents 002-004. Meaningless2106200100051 zeros were deleted from the data. Subents 004-006 were 2106200100052 restored from archive and merged. CORRECTION update. 2106200100053 ENDBIB 51 0 2106200100054 NOCOMMON 0 0 2106200100055 ENDSUBENT 54 0 2106200199999 SUBENT 21062002 20170802 22632106200200001 BIB 4 8 2106200200002 REACTION (92-U-0(N,EL)92-U-0,,DA) 2106200200003 ERR-ANALYS (DATA-ERR) Statistical and correction error, 2106200200004 (ERR-SYS) systematic normalization error 2106200200005 STATUS (TABLE) Tbl. 1 from Nucl.Phys.,40,186,1963 2106200200006 HISTORY (19810504A) ERR-ANALYS changed and data corrected. 2106200200007 (20170731A) SD: SF4 was added to REACTION code. 2106200200008 COS -> ANG as it is given in Tbl.1 (error in the angle 2106200200009 was corrected 3.53 (cos=0.9981) -> 4.52 degr.) 2106200200010 ENDBIB 8 0 2106200200011 NOCOMMON 0 0 2106200200012 DATA 6 48 2106200200013 EN EN-RSL ANG DATA DATA-ERR ERR-SYS 2106200200014 MEV MEV ADEG B/SR B/SR PER-CENT 2106200200015 18. 4. 1.14 18.1 0.9 3.52106200200016 18. 4. 2.53 20.8 1.2 3.52106200200017 18. 4. 4.52 16.9 1.2 3.52106200200018 22.5 5. 1.14 25.4 0.9 3.52106200200019 22.5 5. 2.53 24.1 1.2 3.52106200200020 22.5 5. 4.52 22.2 1.2 3.52106200200021 27.5 5. 1.14 32.2 0.9 3.02106200200022 27.5 5. 2.53 27.3 1.2 3.02106200200023 27.5 5. 4.52 25.3 1.2 3.02106200200024 32.5 5. 1.14 31.3 0.8 2.82106200200025 32.5 5. 2.53 30.9 1.1 2.82106200200026 32.5 5. 4.52 27.4 1.1 2.82106200200027 37.5 5. 1.14 29.0 0.8 2.42106200200028 37.5 5. 2.53 27.7 1.0 2.42106200200029 37.5 5. 4.52 24.7 0.9 2.42106200200030 42.5 5. 1.14 31.3 0.8 2.42106200200031 42.5 5. 2.53 29.0 1.0 2.42106200200032 42.5 5. 4.52 22.7 0.9 2.42106200200033 47.5 5. 1.14 34.3 0.8 2.52106200200034 47.5 5. 2.53 31.5 1.0 2.52106200200035 47.5 5. 4.52 23.9 0.9 2.52106200200036 52.5 6. 1.14 1.14 0.9 2.72106200200037 52.5 6. 2.53 36.6 1.2 2.72106200200038 52.5 6. 4.52 29.2 1.1 2.72106200200039 57.5 6. 1.14 47.4 1.0 3.02106200200040 57.5 6. 2.53 41.0 1.2 3.02106200200041 57.5 6. 4.52 30.7 1.2 3.02106200200042 62.5 7. 1.14 55.5 1.3 3.32106200200043 62.5 7. 2.53 46.3 1.4 3.32106200200044 62.5 7. 4.52 34.4 1.3 3.32106200200045 70. 7. 1.14 63.0 0.9 2.92106200200046 70. 7. 2.53 54.5 1.1 2.92106200200047 70. 7. 4.52 40.1 1.0 2.92106200200048 80. 7. 1.14 75.5 1.3 2.82106200200049 80. 7. 2.53 64.5 1.4 2.82106200200050 80. 7. 4.52 44.0 1.1 2.82106200200051 90. 7. 1.14 80.3 1.4 2.92106200200052 90. 7. 2.53 64.5 1.8 2.92106200200053 90. 7. 4.52 47.0 1.5 2.92106200200054 100. 7. 1.14 84.2 2.0 3.52106200200055 100. 7. 2.53 73.1 2.4 3.52106200200056 100. 7. 4.52 47.3 2.0 3.52106200200057 110. 7. 1.14 90.4 2.7 4.52106200200058 110. 7. 2.53 70.9 3.5 4.52106200200059 110. 7. 4.52 48.4 2.9 4.52106200200060 120. 7. 1.14 93.5 4.9 6.02106200200061 120. 7. 2.53 84.2 6.8 6.02106200200062 120. 7. 4.52 45.2 4.8 6.02106200200063 ENDDATA 50 0 2106200200064 ENDSUBENT 63 0 2106200299999 SUBENT 21062003 20170802 22632106200300001 BIB 4 9 2106200300002 REACTION (92-U-0(N,EL)92-U-0,,DA,,,DERIV) Extrapolated to zero 2106200300003 degree. 2106200300004 ERR-ANALYS (DATA-ERR) Total error including statistical and norma-2106200300005 lization errors (see 21062002). 2106200300006 STATUS (TABLE) Tbl. 1 from Nucl.Phys.,40,186,1963 2106200300007 (DEP,21062002) 2106200300008 HISTORY (19810504A) ERR-ANALYS changed and data corrected. 2106200300009 (20170731A) SD: SF4 was added to REACTION code. 2106200300010 ERR-T -> DATA-ERR. 2106200300011 ENDBIB 9 0 2106200300012 COMMON 1 3 2106200300013 ANG 2106200300014 ADEG 2106200300015 0.0 2106200300016 ENDCOMMON 3 0 2106200300017 DATA 4 16 2106200300018 EN EN-RSL DATA DATA-ERR 2106200300019 MEV MEV B/SR B/SR 2106200300020 18. 4. 19.1 1.5 2106200300021 22.5 5. 25.5 0.9 2106200300022 27.5 5. 31.7 1.7 2106200300023 32.5 5. 31.8 1.0 2106200300024 37.5 5. 29.3 0.8 2106200300025 42.5 5. 32.0 0.8 2106200300026 47.5 5. 35.2 0.9 2106200300027 52.5 6. 41.7 1.2 2106200300028 57.5 6. 46.0 1.6 2106200300029 62.5 7. 56.2 2.4 2106200300030 70. 11. 64.4 1.9 2106200300031 80. 12. 77.6 2.3 2106200300032 90. 13. 81.5 3.1 2106200300033 100. 14. 87.7 3.2 2106200300034 110. 14. 92.1 5.0 2106200300035 120. 15. 100.2 8.5 2106200300036 ENDDATA 18 0 2106200300037 ENDSUBENT 36 0 2106200399999 SUBENT 21062004 20170802 22632106200400001 BIB 4 5 2106200400002 REACTION (92-U-0(N,EL)92-U-0,,POL/DA,,ASY) 2106200400003 ERR-ANALYS (DATA-ERR) No information, probably - statist.error 2106200400004 STATUS (TABLE) Tbl. 2 from Nucl.Phys.,40,186,1963 2106200400005 HISTORY (20170731A) SD: SF4 was added to REACTION code. 2106200400006 Subents 004-006 were restored from archive and merged. 2106200400007 ENDBIB 5 0 2106200400008 NOCOMMON 0 0 2106200400009 DATA 4 48 2106200400010 ANG EN DATA DATA-ERR 2106200400011 ADEG MEV NO-DIM NO-DIM 2106200400012 1.14 18. -0.009 0.016 2106200400013 1.14 22.5 -0.028 0.013 2106200400014 1.14 27.5 -0.047 0.011 2106200400015 1.14 32.5 -0.035 0.010 2106200400016 1.14 37.5 -0.035 0.010 2106200400017 1.14 42.5 -0.046 0.009 2106200400018 1.14 47.5 -0.063 0.009 2106200400019 1.14 52.5 -0.052 0.009 2106200400020 1.14 57.5 -0.066 0.009 2106200400021 1.14 62.5 -0.079 0.008 2106200400022 1.14 70. -0.068 0.006 2106200400023 1.14 80. -0.067 0.006 2106200400024 1.14 90. -0.058 0.008 2106200400025 1.14 100. -0.052 0.009 2106200400026 1.14 110. -0.050 0.013 2106200400027 1.14 120. -0.090 0.022 2106200400028 2.53 18. -0.039 0.023 2106200400029 2.53 22.5 -0.010 0.018 2106200400030 2.53 27.5 -0.028 0.016 2106200400031 2.53 32.5 -0.048 0.014 2106200400032 2.53 37.5 -0.030 0.013 2106200400033 2.53 42.5 -0.030 0.013 2106200400034 2.53 47.5 -0.036 0.012 2106200400035 2.53 52.5 -0.054 0.012 2106200400036 2.53 57.5 -0.046 0.012 2106200400037 2.53 62.5 -0.030 0.012 2106200400038 2.53 70. -0.040 0.008 2106200400039 2.53 80. -0.031 0.009 2106200400040 2.53 90. -0.030 0.010 2106200400041 2.53 100. -0.031 0.013 2106200400042 2.53 110. -0.036 0.018 2106200400043 2.53 120. -0.059 0.027 2106200400044 4.52 18. 0.024 0.023 2106200400045 4.52 22.5 -0.005 0.018 2106200400046 4.52 27.5 0.001 0.014 2106200400047 4.52 32.5 -0.007 0.014 2106200400048 4.52 37.5 -0.001 0.013 2106200400049 4.52 42.5 -0.015 0.013 2106200400050 4.52 47.5 -0.031 0.012 2106200400051 4.52 52.5 -0.030 0.012 2106200400052 4.52 57.5 -0.019 0.012 2106200400053 4.52 62.5 -0.037 0.012 2106200400054 4.52 70. -0.026 0.008 2106200400055 4.52 80. -0.035 0.009 2106200400056 4.52 90. -0.020 0.010 2106200400057 4.52 100. 0.007 0.013 2106200400058 4.52 110. -0.037 0.019 2106200400059 4.52 120. -0.019 0.027 2106200400060 ENDDATA 50 0 2106200400061 ENDSUBENT 60 0 2106200499999 ENDENTRY 4 0 2106299999999