ENTRY 12641 20220210 14981264100000001 SUBENT 12641001 20220210 14981264100100001 BIB 16 44 1264100100002 TITLE Total cross sections for 14-MeV neutrons 1264100100003 AUTHOR (D.I.Meyer,W.Nyer) 1264100100004 REFERENCE (R,LA-1279,1951) 1264100100005 INSTITUTE (1USALAS) 1264100100006 FACILITY (CCW,1USALAS) A Cockcroft-Walton accelerator operated 1264100100007 at 250 kilovolts. 1264100100008 INC-SOURCE (D-T) If the reaction energy is taken as 17.60 MeV, 1264100100009 the neutron energies range from 14.08 to 14.35 MeV at 1264100100010 the angle (70 degrees to the beam) at which the 1264100100011 measurements were made. 1264100100012 DETECTOR (GEMUC) Copper spirals wrapped around Geiger tube to 1264100100013 detect Cu(n,2n) reaction neutrons were used. 1264100100014 Background was reduced by shielding the detector with 1264100100015 cadmium. 1264100100016 SAMPLE All samples were 1 inch in diameter except for 1264100100017 Cu samples which were 1/2 inch and 1 inch diameter. 1264100100018 METHOD (TRN) The transmission is defined as the ratio of the 1264100100019 neutron flux as measured by the detector with a 1264100100020 scattering sample in the path of the neutrons to the 1264100100021 neutron flux with no scattering sample in the path of 1264100100022 the neutrons. In general the length of the scattering 1264100100023 sample was such as to give a transmission of 1264100100024 approximately 0.5. 1264100100025 ANALYSIS Cross sections were evaluated by relation sigma = 1264100100026 (1/nx)*log(1/T), where n is the number of atoms or 1264100100027 molecules per cm3, x is the length of the scattering 1264100100028 sample in centimeters, and T is the transmission 1264100100029 corrected for the effect of room-scattered neutrons. 1264100100030 ERR-ANALYS (DATA-ERR) Standard deviations. 1264100100031 (ERR-S) Statistical errors 1264100100032 (ERR-1,0.25,1.) Small-angle scattering effects. 1264100100033 CORRECTION Error due to elastic neutron scattering was about 1264100100034 0.25 to 1 percent. No correction for this effect was 1264100100035 considered. Corrections due to room scattered 1264100100036 neutrons were considered. 1264100100037 MONITOR (29-CU-63(N,2N)29-CU-62,,SIG) 1264100100038 MONIT-REF (11797002,J.L.Fowler+,J,PR,77,787,1950) 1264100100039 STATUS (TABLE) page 7. 1264100100040 HISTORY (19840308C) 1264100100041 (20220210A) BP: Updated to new date formats, lower 1264100100042 case. corrections according last EXFOR rules and 1264100100043 Dict. Corrected error analysis, monitor, detector, 1264100100044 method and incident neutron energy, added status, 1264100100045 monitor reference, analysis, molecular cross sections. 1264100100046 ENDBIB 44 0 1264100100047 COMMON 3 3 1264100100048 EN-MIN EN-MAX ERR-S 1264100100049 MEV MEV PER-CENT 1264100100050 14.08 14.35 1.2 1264100100051 ENDCOMMON 3 0 1264100100052 ENDSUBENT 51 0 1264100199999 SUBENT 12641002 20220210 14981264100200001 BIB 2 2 1264100200002 REACTION (1-H-1(N,TOT),,SIG) 1264100200003 SAMPLE CH2 compound 1264100200004 ENDBIB 2 0 1264100200005 NOCOMMON 0 0 1264100200006 DATA 2 1 1264100200007 DATA DATA-ERR 1264100200008 B B 1264100200009 0.675 0.020 1264100200010 ENDDATA 3 0 1264100200011 ENDSUBENT 10 0 1264100299999 SUBENT 12641003 20220210 14981264100300001 BIB 2 2 1264100300002 REACTION (1-H-2(N,TOT),,SIG) 1264100300003 SAMPLE D2O 1264100300004 ENDBIB 2 0 1264100300005 NOCOMMON 0 0 1264100300006 DATA 2 1 1264100300007 DATA DATA-ERR 1264100300008 B B 1264100300009 0.81 0.03 1264100300010 ENDDATA 3 0 1264100300011 ENDSUBENT 10 0 1264100399999 SUBENT 12641004 20220210 14981264100400001 BIB 2 2 1264100400002 REACTION (6-C-0(N,TOT),,SIG) 1264100400003 SAMPLE Carbon sample. 1264100400004 ENDBIB 2 0 1264100400005 NOCOMMON 0 0 1264100400006 DATA 2 1 1264100400007 DATA DATA-ERR 1264100400008 B B 1264100400009 1.29 0.02 1264100400010 ENDDATA 3 0 1264100400011 ENDSUBENT 10 0 1264100499999 SUBENT 12641005 20220210 14981264100500001 BIB 2 2 1264100500002 REACTION (7-N-0(N,TOT),,SIG) 1264100500003 SAMPLE Nitrogen. 1264100500004 ENDBIB 2 0 1264100500005 NOCOMMON 0 0 1264100500006 DATA 2 1 1264100500007 DATA DATA-ERR 1264100500008 B B 1264100500009 1.39 0.05 1264100500010 ENDDATA 3 0 1264100500011 ENDSUBENT 10 0 1264100599999 SUBENT 12641006 20220210 14981264100600001 BIB 2 2 1264100600002 REACTION (8-O-0(N,TOT),,SIG) 1264100600003 SAMPLE Compounds H2O and CH2-O2. 1264100600004 ENDBIB 2 0 1264100600005 NOCOMMON 0 0 1264100600006 DATA 2 2 1264100600007 DATA DATA-ERR 1264100600008 B B 1264100600009 1.62 0.04 1264100600010 1.60 0.04 1264100600011 ENDDATA 4 0 1264100600012 ENDSUBENT 11 0 1264100699999 SUBENT 12641007 20220210 14981264100700001 BIB 2 2 1264100700002 REACTION (29-CU-0(N,TOT),,SIG) 1264100700003 SAMPLE Natural copper. 1264100700004 ENDBIB 2 0 1264100700005 NOCOMMON 0 0 1264100700006 DATA 2 1 1264100700007 DATA DATA-ERR 1264100700008 B B 1264100700009 2.85 0.05 1264100700010 ENDDATA 3 0 1264100700011 ENDSUBENT 10 0 1264100799999 SUBENT 12641008 20220309 14981264100800001 BIB 3 3 1264100800002 REACTION (1-H-PLE(N,TOT),,SIG) 1264100800003 SAMPLE CH2. 1264100800004 HISTORY (20220210C) BP 1264100800005 ENDBIB 3 0 1264100800006 NOCOMMON 0 0 1264100800007 DATA 2 1 1264100800008 DATA DATA-ERR 1264100800009 B B 1264100800010 2.64 0.03 1264100800011 ENDDATA 3 0 1264100800012 ENDSUBENT 11 0 1264100899999 SUBENT 12641009 20220309 14981264100900001 BIB 3 3 1264100900002 REACTION (1-H-WTR(N,TOT),,SIG) 1264100900003 SAMPLE H2O. 1264100900004 HISTORY (20220210C) BP 1264100900005 ENDBIB 3 0 1264100900006 NOCOMMON 0 0 1264100900007 DATA 2 1 1264100900008 DATA DATA-ERR 1264100900009 B B 1264100900010 2.97 0.03 1264100900011 ENDDATA 3 0 1264100900012 ENDSUBENT 11 0 1264100999999 SUBENT 12641010 20220309 14981264101000001 BIB 3 3 1264101000002 REACTION (1-H-CMP(N,TOT),,SIG) CH2O2. 1264101000003 SAMPLE CH2O2. 1264101000004 HISTORY (20220210C) BP 1264101000005 ENDBIB 3 0 1264101000006 NOCOMMON 0 0 1264101000007 DATA 2 1 1264101000008 DATA DATA-ERR 1264101000009 B B 1264101000010 5.84 0.10 1264101000011 ENDDATA 3 0 1264101000012 ENDSUBENT 11 0 1264101099999 SUBENT 12641011 20220309 14981264101100001 BIB 3 3 1264101100002 REACTION (1-H-D2O(N,TOT),,SIG) 1264101100003 SAMPLE D2O. 1264101100004 HISTORY (20220210C) BP 1264101100005 ENDBIB 3 0 1264101100006 NOCOMMON 0 0 1264101100007 DATA 2 1 1264101100008 DATA DATA-ERR 1264101100009 B B 1264101100010 3.23 0.03 1264101100011 ENDDATA 3 0 1264101100012 ENDSUBENT 11 0 1264101199999 ENDENTRY 11 0 1264199999999