ENTRY 10245 20210803 14901024500000001 SUBENT 10245001 20210803 14901024500100001 BIB 13 29 1024500100002 TITLE Neutron-helium scattering 1024500100003 AUTHOR (D.S.Cramer,L.Cranberg) 1024500100004 REFERENCE (J,NP/A,180,273,1972) 1024500100005 #doi:10.1016/0375-9474(72)90169-8 1024500100006 REL-REF (I,,,J,PT,19,(7),112,1966) The University of Virginia 1024500100007 accelerator description. 1024500100008 INSTITUTE (1USAVIR) 1024500100009 FACILITY (VDG,1USAVIR) 5.5 mV Van de Graaff accelerator. 1024500100010 SAMPLE A stainless steel spherical vessel of 3.8 cm diam., 1024500100011 0.08 cm wall thickness was filled with 303 atmospheres 1024500100012 of 4He. 1024500100013 DETECTOR (SCIN) Plastic scintillator (12.7 cm diam. by 2.54 cm 1024500100014 thick) coupled to a photomultiplier tube. The 1024500100015 relative efficiency of the neutron detector was 1024500100016 obtained by measuring the angular distribution of 1024500100017 neutrons scattered from a thin polyethylene radiator 1024500100018 (0.26 cm diam.) and using TOF methods to sort out 1024500100019 neutrons scattered from hydrogen and from carbon. 1024500100020 METHOD (PHD,TOF) Scattered neutrons were detected at the end 1024500100021 of a tied flight path of 2.25 m with a plastic 1024500100022 scintillator. 1024500100023 CORRECTION Data corrected for background, multiple scattering, 1024500100024 and detector efficiency. 1024500100025 ERR-ANALYS (DATA-ERR) Experimental errors. 1024500100026 STATUS (APRVD) Approved by D.S.Cramer on 8 October 1975. 1024500100027 HISTORY (19741211C) 1024500100028 (19821018A) Converted to reaction formalism. 1024500100029 (20011130A) Converted to new date formats, lower case. 1024500100030 (20210803A) BP: Updated entry, digitized Fig.3 data. 1024500100031 ENDBIB 29 0 1024500100032 NOCOMMON 0 0 1024500100033 ENDSUBENT 32 0 1024500199999 SUBENT 10245002 20210803 14901024500200001 BIB 6 12 1024500200002 REACTION (2-HE-4(N,EL)2-HE-4,,DA) 1024500200003 INC-SOURCE (P-LI7) For 0.545 and 0.840 MeV neutrons. 1024500200004 MONITOR (2-HE-4(N,EL)2-HE-4,,SIG) Normalized to elastic cross 1024500200005 sections. 1024500200006 MONIT-REF ((MONIT),G.R.Satchler+,J,NP/A,112,1,1968) 1024500200007 ((MONIT)10078001,G.L.Morgan+,J,PR,168,1114,1968) 1024500200008 ((MONIT),J.D.Seagrave,W,SEAGRAVE,1970) Normalization 1024500200009 cross sections used in the present work. 1024500200010 STATUS (TABLE) Tabulated data received from D. Cramer, 7 1024500200011 July, 1975. Also shown in Fig. 3 of the reference as 1024500200012 ARB-UNITS. 1024500200013 HISTORY (20210803A) BP: Added energy errors and monitor values.1024500200014 ENDBIB 12 0 1024500200015 NOCOMMON 0 0 1024500200016 DATA 6 32 1024500200017 EN EN-ERR ANG-CM DATA-CM DATA-ERR MONIT 1024500200018 MEV MEV ADEG MB/SR MB/SR B 1024500200019 0.545 0.005 25.6 68. 21. 1.751024500200020 0.545 0.005 38.7 43. 14. 1.751024500200021 0.545 0.005 49.9 73. 15. 1.751024500200022 0.545 0.005 61.7 67. 14. 1.751024500200023 0.545 0.005 73.2 48. 4. 1.751024500200024 0.545 0.005 84.2 74. 3. 1.751024500200025 0.545 0.005 94.8 100. 4. 1.751024500200026 0.545 0.005 105.1 133. 5. 1.751024500200027 0.545 0.005 114.8 183. 7. 1.751024500200028 0.545 0.005 124.1 237. 11. 1.751024500200029 0.545 0.005 131.0 243. 11. 1.751024500200030 0.545 0.005 141.5 326. 12. 1.751024500200031 0.545 0.005 149.7 344. 9. 1.751024500200032 0.545 0.005 157.6 374. 10. 1.751024500200033 0.840 0.008 24.9 408. 66. 4.601024500200034 0.840 0.008 37.2 367. 26. 4.601024500200035 0.840 0.008 49.3 310. 13. 4.601024500200036 0.840 0.008 61.1 195. 14. 4.601024500200037 0.840 0.008 61.1 212. 11. 4.601024500200038 0.840 0.008 72.6 186. 10. 4.601024500200039 0.840 0.008 83.7 163. 9. 4.601024500200040 0.840 0.008 94.4 208. 9. 4.601024500200041 0.840 0.008 104.6 280. 11. 4.601024500200042 0.840 0.008 114.4 353. 15. 4.601024500200043 0.840 0.008 123.7 440. 23. 4.601024500200044 0.840 0.008 132.6 581. 25. 4.601024500200045 0.840 0.008 132.6 607. 26. 4.601024500200046 0.840 0.008 132.6 565. 24. 4.601024500200047 0.840 0.008 141.1 704. 25. 4.601024500200048 0.840 0.008 149.3 815. 29. 4.601024500200049 0.840 0.008 157.2 881. 32. 4.601024500200050 0.840 0.008 161.1 959. 59. 4.601024500200051 ENDDATA 34 0 1024500200052 ENDSUBENT 51 0 1024500299999 SUBENT 10245003 20210803 14901024500300001 BIB 5 14 1024500300002 REACTION (2-HE-4(N,EL)2-HE-4,,DA,,REL) 1024500300003 INC-SOURCE (P-T) source used for 1.16 and 1.33 MeV neutron data. 1024500300004 ANALYSIS In the data representations of Fig. 3 the ordinate 1024500300005 scale is chosen so that the angular distribution 1024500300006 yields unity when integrated over angle (both polar 1024500300007 and azimuthal). This procedure is convenient for 1024500300008 comparisons of relative angular distributions, since 1024500300009 it separates out the uncertainties associated with 1024500300010 the values adopted for the total cross section, which 1024500300011 is usually obtained by an independent measurement. 1024500300012 STATUS (CURVE) Fig. 3, page 279. 1024500300013 HISTORY (20011130U) INC-SOURCE and MONITOR added 1024500300014 (20210803A) BP: Updated subentry, corrected reaction 1024500300015 string, digitized the data. 1024500300016 ENDBIB 14 0 1024500300017 NOCOMMON 0 0 1024500300018 DATA 5 32 1024500300019 EN EN-ERR COS-CM DATA-CM DATA-ERR 1024500300020 MEV MEV NO-DIM ARB-UNITS ARB-UNITS 1024500300021 1.16 0.012 -0.950 0.138 0.005 1024500300022 1.16 0.012 -0.913 0.134 0.005 1024500300023 1.16 0.012 -0.862 0.118 0.005 1024500300024 1.16 0.012 -0.778 0.101 0.003 1024500300025 1.16 0.012 -0.680 0.081 0.004 1024500300026 1.16 0.012 -0.548 0.068 0.004 1024500300027 1.16 0.012 -0.416 0.056 0.005 1024500300028 1.16 0.012 -0.250 0.044 0.005 1024500300029 1.16 0.012 -0.070 0.041 0.004 1024500300030 1.16 0.012 0.111 0.046 0.004 1024500300031 1.16 0.012 0.300 0.059 0.004 1024500300032 1.16 0.012 0.486 0.075 0.006 1024500300033 1.16 0.012 0.650 0.101 0.004 1024500300034 1.16 0.012 0.739 0.109 0.004 1024500300035 1.16 0.012 0.802 0.120 0.005 1024500300036 1.16 0.012 0.915 0.142 0.005 1024500300037 1.33 0.013 -0.954 0.111 0.004 1024500300038 1.33 0.013 -0.921 0.107 0.005 1024500300039 1.33 0.013 -0.862 0.098 0.005 1024500300040 1.33 0.013 -0.777 0.088 0.003 1024500300041 1.33 0.013 -0.669 0.072 0.005 1024500300042 1.33 0.013 -0.555 0.062 0.004 1024500300043 1.33 0.013 -0.414 0.050 0.005 1024500300044 1.33 0.013 -0.251 0.042 0.004 1024500300045 1.33 0.013 -0.077 0.046 0.005 1024500300046 1.33 0.013 0.104 0.053 0.005 1024500300047 1.33 0.013 0.297 0.069 0.004 1024500300048 1.33 0.013 0.479 0.089 0.005 1024500300049 1.33 0.013 0.646 0.109 0.005 1024500300050 1.33 0.013 0.724 0.116 0.006 1024500300051 1.33 0.013 0.798 0.130 0.005 1024500300052 1.33 0.013 0.902 0.153 0.007 1024500300053 ENDDATA 34 0 1024500300054 ENDSUBENT 53 0 1024500399999 ENDENTRY 3 0 1024599999999