ENTRY 10230 20010309 00001023000000001 SUBENT 10230001 20010309 00001023000100001 BIB 14 37 1023000100002 INSTITUTE (1USADAV) 1023000100003 REFERENCE (J,PR/C,5,1,197201) 1023000100004 AUTHOR (M.AUMAN,F.P.BRADY,J.A.JUNGERMAN,W.J.KNOX,M.R.MCGIE, 1023000100005 T.C.MONTGOMERY) 1023000100006 TITLE Neutron Total Cross Sections of the Light Elements in 1023000100007 the Energy Range 24-60 MeV 1023000100008 FACILITY (CYCLO) Isochronous cyclotron. 1023000100009 INC-SOURCE (P-LI7) 7Li(p,n) source 1023000100010 INC-SPECT Neutrons monochromatic with resolution (FWHM) of 2 1023000100011 MeV. Mean energy determined to better than 100 keV by 1023000100012 time-of-flight. 1023000100013 SAMPLE Cylinders 63mm to 127mm long, 25.4mm diameter. high- 1023000100014 purity material. 1023000100015 METHOD (TOF) Time-of-flight 1023000100016 DETECTOR (TELES) Each telescope contained veto scintillator, CH21023000100017 converter, and two thin (1mm) scintillators seperated 1023000100018 by copper absorber. Absorber removed low-energy tail. 1023000100019 Neutron-detection efficiency of each about 1%. 1023000100020 Beam passed in sequence through a telescope, the 1023000100021 sample, and a second and third telescope. Target - 1023000100022 sample distance 4 m. Sample - midpoint between second 1023000100023 and third telescope distance 3.5 m. 1023000100024 CORRECTION Corrected for background, air displacement, dead time, 1023000100025 finite solid angle, beam hardening, and impurities. 1023000100026 Total of all corrections typically 0.5%. 1023000100027 Energy uncertainty correction small and only made at 1023000100028 46.18 MeV. 1023000100029 ERR-ANALYS (DATA-ERR) Includes uncertainty due to 1023000100030 . counting statistics. 1023000100031 . background correction (20%), 1023000100032 . dead-time correction (30%), 1023000100033 . impurity correction (50%). 1023000100034 STATUS (APRVD) Approved by author. 1023000100035 Data taken from Table II of reference. 1023000100036 HISTORY (19720111C) 1023000100037 (19821015A) Converted to REACTION formalism 1023000100038 (20010309A) Updated to new date formats, lower case. 1023000100039 ENDBIB 37 0 1023000100040 NOCOMMON 0 0 1023000100041 ENDSUBENT 40 0 1023000199999 SUBENT 10230002 20010309 00001023000200001 BIB 1 1 1023000200002 REACTION (4-BE-9(N,TOT),,SIG) 1023000200003 ENDBIB 1 0 1023000200004 NOCOMMON 0 0 1023000200005 DATA 3 5 1023000200006 EN DATA DATA-ERR 1023000200007 MEV MB MB 1023000200008 36.34 971.3 2.3 1023000200009 46.18 810.0 1.7 1023000200010 49.07 762.2 1.7 1023000200011 54.37 696.6 1.8 1023000200012 58.90 641.6 1.6 1023000200013 ENDDATA 7 0 1023000200014 ENDSUBENT 13 0 1023000299999 SUBENT 10230003 20010309 00001023000300001 BIB 1 1 1023000300002 REACTION (6-C-0(N,TOT),,SIG) 1023000300003 ENDBIB 1 0 1023000300004 NOCOMMON 0 0 1023000300005 DATA 3 8 1023000300006 EN DATA DATA-ERR 1023000300007 MEV MB MB 1023000300008 24.63 1389.6 1.7 1023000300009 29.25 1311.2 1.7 1023000300010 36.34 1179.3 1.4 1023000300011 39.56 1130.7 1.2 1023000300012 46.18 1012.7 1.4 1023000300013 49.06 961.8 1.0 1023000300014 54.37 883.3 1.1 1023000300015 58.90 821.5 1.5 1023000300016 ENDDATA 10 0 1023000300017 ENDSUBENT 16 0 1023000399999 SUBENT 10230004 20010309 00001023000400001 BIB 3 3 1023000400002 REACTION (7-N-0(N,TOT),,SIG) 1023000400003 SAMPLE CH2N2 (Melamine) sample. 1023000400004 METHOD Obtained from CH2N2 - CH2 difference. 1023000400005 ENDBIB 3 0 1023000400006 NOCOMMON 0 0 1023000400007 DATA 3 5 1023000400008 EN DATA DATA-ERR 1023000400009 MEV MB MB 1023000400010 36.34 1333.0 7.8 1023000400011 46.18 1178.4 5.8 1023000400012 49.06 1109.6 5.2 1023000400013 54.37 1016.8 4.2 1023000400014 58.90 951.0 5.6 1023000400015 ENDDATA 7 0 1023000400016 ENDSUBENT 15 0 1023000499999 SUBENT 10230005 20010309 00001023000500001 BIB 3 3 1023000500002 REACTION (8-O-0(N,TOT),,SIG) 1023000500003 SAMPLE Al2O3 sample. 1023000500004 METHOD Obtained from Al2O3 - Al difference. 1023000500005 ENDBIB 3 0 1023000500006 NOCOMMON 0 0 1023000500007 DATA 3 7 1023000500008 EN DATA DATA-ERR 1023000500009 MEV MB MB 1023000500010 29.25 1578.2 8.3 1023000500011 36.34 1460.6 8.1 1023000500012 39.56 1412.4 6.6 1023000500013 46.18 1287.2 6.5 1023000500014 49.06 1228.4 5.4 1023000500015 54.37 1149.0 6.1 1023000500016 58.90 1066.4 5.4 1023000500017 ENDDATA 9 0 1023000500018 ENDSUBENT 17 0 1023000599999 SUBENT 10230006 20010309 00001023000600001 BIB 1 1 1023000600002 REACTION (12-MG-0(N,TOT),,SIG) 1023000600003 ENDBIB 1 0 1023000600004 NOCOMMON 0 0 1023000600005 DATA 3 5 1023000600006 EN DATA DATA-ERR 1023000600007 MEV MB MB 1023000600008 36.34 1789.1 7.4 1023000600009 46.18 1664.7 7.7 1023000600010 49.06 1616.8 5.3 1023000600011 54.37 1534.5 6.3 1023000600012 58.90 1448.0 4.6 1023000600013 ENDDATA 7 0 1023000600014 ENDSUBENT 13 0 1023000699999 SUBENT 10230007 20010309 00001023000700001 BIB 1 1 1023000700002 REACTION (13-AL-27(N,TOT),,SIG) 1023000700003 ENDBIB 1 0 1023000700004 NOCOMMON 0 0 1023000700005 DATA 3 7 1023000700006 EN DATA DATA-ERR 1023000700007 MEV MB MB 1023000700008 29.25 1885.8 8.2 1023000700009 36.34 1871.3 8.9 1023000700010 39.56 1854.3 6.8 1023000700011 46.18 1764.0 5.9 1023000700012 49.06 1712.0 5.3 1023000700013 54.37 1619.2 6.1 1023000700014 58.90 1539.7 5.4 1023000700015 ENDDATA 9 0 1023000700016 ENDSUBENT 15 0 1023000799999 SUBENT 10230008 20010309 00001023000800001 BIB 2 2 1023000800002 REACTION (14-SI-0(N,TOT),,SIG) 1023000800003 SAMPLE SiO2 sample. 1023000800004 ENDBIB 2 0 1023000800005 NOCOMMON 0 0 1023000800006 DATA 3 7 1023000800007 EN DATA DATA-ERR 1023000800008 MEV MB MB 1023000800009 29.25 1960. 25. 1023000800010 36.34 1971. 20. 1023000800011 39.56 1937. 16. 1023000800012 46.18 1851. 16. 1023000800013 49.06 1800. 14. 1023000800014 54.37 1696. 15. 1023000800015 58.90 1621. 13. 1023000800016 ENDDATA 9 0 1023000800017 ENDSUBENT 16 0 1023000899999 ENDENTRY 8 0 1023099999999