ENTRY 10763 20100401 13631076300000001 SUBENT 10763001 20100401 13631076300100001 BIB 13 31 1076300100002 INSTITUTE (1USALRL) 1076300100003 REFERENCE (J,NSE,69,375,197903) 1076300100004 AUTHOR (T.W.Phillips,R.E.Howe) 1076300100005 TITLE Total neutron cross section for Americium-241. 1076300100006 FACILITY (LINAC,1USALRL) 100-MeV linac. 1076300100007 METHOD (TOF) Time of flight; 250 meter flight path. 1076300100008 SAMPLE A large sample of isotopically pure (99.975%) 241Am 1076300100009 oxide was reduced to metal. The resultant 50 gram 1076300100010 sample was doubly encapsulated in aluminum cans 1076300100011 (0.05-cm thick walls and 0.025-cm thick ends.) 1076300100012 INC-SOURCE Electron beam of the linac was pulsed with 10 nsec 1076300100013 burst width. On striking a tantalum target cooled by 1076300100014 heavy water,this electron beam produced a continuous 1076300100015 energy spectrum of neutrons. 1076300100016 DETECTOR (SCIN) Scintillation detector 1076300100017 CORRECTION The neutron flight time spectra were corrected for 1076300100018 dead time losses and added together to give the 1076300100019 transmitted spectrum for each sample. 1076300100020 A small measured background (less than 5%) due only 1076300100021 to cosmic ray events was subtracted from each of 1076300100022 these spectra. 1076300100023 ERR-ANALYS (ERR-S) Statistical uncertainty. 1076300100024 Systematic errors which would modify the overall 1076300100025 normalization of the cross section are estimated to 1076300100026 be less than 3%. 1076300100027 STATUS (APRVD) Approved by T.W. Phillips, 1978/11/29. 1076300100028 (TABLE) data taken from Table I in reference. 1076300100029 HISTORY (19780726C) 1076300100030 (19790501A) reference updated 1076300100031 (20100401A) VM:Updated to new date formats,lower case. 1076300100032 BIB updates 1076300100033 ENDBIB 31 0 1076300100034 NOCOMMON 0 0 1076300100035 ENDSUBENT 34 0 1076300199999 SUBENT 10763002 20100401 13631076300200001 BIB 2 2 1076300200002 REACTION (95-AM-241(N,TOT),,SIG) 1076300200003 HISTORY (20100401A) Data error heading updated. 1076300200004 ENDBIB 2 0 1076300200005 NOCOMMON 0 0 1076300200006 DATA 3 32 1076300200007 EN DATA ERR-S 1076300200008 MEV B B 1076300200009 0.45 9.13 0.03 1076300200010 0.50 8.88 0.02 1076300200011 0.55 8.51 0.02 1076300200012 0.61 8.22 0.02 1076300200013 0.70 7.96 0.01 1076300200014 0.80 7.57 0.01 1076300200015 0.90 7.18 0.01 1076300200016 1.02 7.00 0.01 1076300200017 1.20 6.87 0.01 1076300200018 1.40 6.76 0.01 1076300200019 1.60 6.78 0.01 1076300200020 1.82 6.84 0.01 1076300200021 2.10 7.04 0.01 1076300200022 2.42 7.27 0.01 1076300200023 2.80 7.50 0.01 1076300200024 3.20 7.65 0.02 1076300200025 3.59 7.72 0.02 1076300200026 4.02 7.72 0.02 1076300200027 4.61 7.70 0.02 1076300200028 5.49 7.41 0.02 1076300200029 6.49 7.00 0.02 1076300200030 7.48 6.63 0.02 1076300200031 8.48 6.25 0.02 1076300200032 9.49 5.98 0.03 1076300200033 10.50 5.83 0.04 1076300200034 11.49 5.69 0.04 1076300200035 12.61 5.62 0.05 1076300200036 14.11 5.54 0.05 1076300200037 15.98 5.73 0.06 1076300200038 17.95 5.91 0.07 1076300200039 20.60 5.88 0.09 1076300200040 24.79 5.93 0.07 1076300200041 ENDDATA 34 0 1076300200042 ENDSUBENT 41 0 1076300299999 ENDENTRY 2 0 1076399999999