ENTRY 30941 20090914 31413094100000001 SUBENT 30941001 20090914 31413094100100001 BIB 14 28 3094100100002 TITLE Measurements of total cross sections of teflon, 3094100100003 polytetrafluorethylene, in the epithermal range. 3094100100004 AUTHOR (P.J.Prado,J.Dawidowski,J.R.Granada,R.E.Mayer, 3094100100005 G.Sibona,G.J.Cuello). 3094100100006 INSTITUTE (3ARGCAB) 3094100100007 EXP-YEAR (1990) 3094100100008 REFERENCE (W,GRANADA,199101) 3094100100009 MONITOR Absolute transmission measurement. 3094100100010 FACILITY (LINAC,3ARGCAB) Pulsed 25 MeV electron linear 3094100100011 accelerator at the Centro Atomico Bariloche. 3094100100012 The Linac was run at 100 pps, 25 micro-Amp 3094100100013 average current. 3094100100014 INC-SOURCE Lead target + thin polyethylene moderator. 3094100100015 A cadmium sheet was placed in the beam to avoid frame 3094100100016 overlap. 3094100100017 METHOD (TOF,TRN)Time of flight technique,flight path = 17.87m 3094100100018 The sample-in sample-out method was used, with the 3094100100019 sample changer placed at 8.40 m from the neutron source3094100100020 DETECTOR (HE3SP) Seven He-3 counters, each of 2.5 cm diam. and 3094100100021 15 cm active length, with 10 atm filling gas pressure. 3094100100022 CORRECTION Performed: background and dead time 3094100100023 Negligible: in-scattering and multiple scattering 3094100100024 ERR-ANALYS (DATA-ERR) Quoted errors due to uncertainty of 3094100100025 thickness (negligible) and statistics. 3094100100026 STATUS (TABLE) Data taken from private communication dated at 3094100100027 9101 from Dr. Granada 3094100100028 HISTORY (19910131C) VOF.- 3094100100029 (20090912A) SD:Updated to new date formats,lower case. 3094100100030 ENDBIB 28 0 3094100100031 COMMON 2 3 3094100100032 TEMP TEMP-ERR 3094100100033 K K 3094100100034 292.0 1.0 3094100100035 ENDCOMMON 3 0 3094100100036 ENDSUBENT 35 0 3094100199999 SUBENT 30941002 20090914 31413094100200001 BIB 2 7 3094100200002 REACTION (6-C-CMP(N,THS)6-C-CMP,,SIG) 3094100200003 Total cross section per C-F2 (Teflon) molecule. 3094100200004 SAMPLE Polymeric sample (C-F2)n at 292 deg-K. 3094100200005 Density = (2.12 + - .03) g/cm**3. 3094100200006 Thickness=(2.498 + - .002) cm 3094100200007 The teflon sample was supplied by Reaktorstation 3094100200008 Garching. 3094100200009 ENDBIB 7 0 3094100200010 NOCOMMON 0 0 3094100200011 DATA 3 56 3094100200012 EN DATA DATA-ERR 3094100200013 EV B B 3094100200014 5.596E-01 12.5 .3 3094100200015 6.683E-01 12.5 .3 3094100200016 7.499E-01 12.4 .3 3094100200017 8.413E-01 12.7 .3 3094100200018 9.441E-01 12.6 .3 3094100200019 1.059E+00 12.6 .3 3094100200020 1.189E+00 12.6 .3 3094100200021 1.334E+00 12.5 .3 3094100200022 1.496E+00 12.5 .3 3094100200023 1.679E+00 12.5 .3 3094100200024 1.884E+00 12.4 .3 3094100200025 2.113E+00 12.6 .3 3094100200026 2.371E+00 12.5 .3 3094100200027 2.661E+00 12.6 .3 3094100200028 2.985E+00 12.5 .3 3094100200029 3.350E+00 12.6 .3 3094100200030 3.758E+00 12.5 .3 3094100200031 4.217E+00 12.6 .3 3094100200032 4.731E+00 12.6 .3 3094100200033 5.309E+00 12.5 .3 3094100200034 5.957E+00 12.5 .3 3094100200035 6.683E+00 12.7 .3 3094100200036 7.499E+00 12.7 .3 3094100200037 8.414E+00 12.7 .3 3094100200038 9.441E+00 12.5 .3 3094100200039 1.059E+01 12.4 .3 3094100200040 1.189E+01 12.7 .3 3094100200041 1.334E+01 12.6 .3 3094100200042 1.496E+01 12.6 .3 3094100200043 1.679E+01 12.7 .3 3094100200044 1.884E+01 12.8 .3 3094100200045 2.113E+01 12.6 .3 3094100200046 2.371E+01 12.7 .3 3094100200047 2.661E+01 12.8 .3 3094100200048 2.985E+01 12.6 .3 3094100200049 3.350E+01 12.5 .3 3094100200050 3.758E+01 12.7 .3 3094100200051 4.217E+01 12.4 .3 3094100200052 4.731E+01 12.6 .3 3094100200053 5.309E+01 12.7 .3 3094100200054 5.957E+01 12.5 .3 3094100200055 6.683E+01 12.5 .3 3094100200056 7.499E+01 12.5 .3 3094100200057 8.414E+01 12.8 .3 3094100200058 9.441E+01 12.5 .4 3094100200059 1.059E+02 12.9 .3 3094100200060 1.189E+02 12.6 .3 3094100200061 1.334E+02 12.9 .4 3094100200062 1.496E+02 12.6 .4 3094100200063 1.679E+02 12.7 .3 3094100200064 1.884E+02 12.4 .4 3094100200065 2.113E+02 12.4 .4 3094100200066 2.371E+02 12.6 .4 3094100200067 2.661E+02 12.5 .3 3094100200068 2.985E+02 12.6 .4 3094100200069 3.351E+02 12.6 .3 3094100200070 ENDDATA 58 0 3094100200071 ENDSUBENT 70 0 3094100299999 SUBENT 30941003 20090914 31413094100300001 BIB 4 5 3094100300002 REACTION (9-F-19(N,THS)9-F-19,BA,SIG) 3094100300003 MONITOR (6-C-0(N,THS)6-C-0,BA,SIG) 3094100300004 ANALYSIS Average total cross section derived from teflon data, 3094100300005 by subtraction of (free atom) carbon contributions. 3094100300006 STATUS (DEP,30941002) 3094100300007 ENDBIB 5 0 3094100300008 COMMON 1 3 3094100300009 MONIT 3094100300010 B 3094100300011 4.746 3094100300012 ENDCOMMON 3 0 3094100300013 DATA 3 56 3094100300014 EN DATA DATA-ERR 3094100300015 EV B B 3094100300016 5.596E-01 3.60 .15 3094100300017 6.683E-01 3.61 .15 3094100300018 7.499E-01 3.58 .15 3094100300019 8.413E-01 3.69 .15 3094100300020 9.441E-01 3.67 .15 3094100300021 1.059E+00 3.65 .15 3094100300022 1.189E+00 3.65 .15 3094100300023 1.334E+00 3.63 .15 3094100300024 1.496E+00 3.62 .15 3094100300025 1.679E+00 3.60 .15 3094100300026 1.884E+00 3.58 .16 3094100300027 2.113E+00 3.66 .16 3094100300028 2.371E+00 3.62 .15 3094100300029 2.661E+00 3.65 .16 3094100300030 2.985E+00 3.61 .15 3094100300031 3.350E+00 3.67 .16 3094100300032 3.758E+00 3.60 .16 3094100300033 4.217E+00 3.65 .16 3094100300034 4.731E+00 3.67 .16 3094100300035 5.309E+00 3.62 .16 3094100300036 5.957E+00 3.60 .15 3094100300037 6.683E+00 3.72 .16 3094100300038 7.499E+00 3.71 .16 3094100300039 8.414E+00 3.71 .16 3094100300040 9.441E+00 3.61 .16 3094100300041 1.059E+01 3.55 .16 3094100300042 1.189E+01 3.72 .16 3094100300043 1.334E+01 3.65 .16 3094100300044 1.496E+01 3.66 .17 3094100300045 1.679E+01 3.71 .17 3094100300046 1.884E+01 3.73 .16 3094100300047 2.113E+01 3.66 .16 3094100300048 2.371E+01 3.69 .17 3094100300049 2.661E+01 3.77 .16 3094100300050 2.985E+01 3.65 .17 3094100300051 3.350E+01 3.64 .17 3094100300052 3.758E+01 3.73 .17 3094100300053 4.217E+01 3.59 .17 3094100300054 4.731E+01 3.67 .16 3094100300055 5.309E+01 3.73 .17 3094100300056 5.957E+01 3.61 .18 3094100300057 6.683E+01 3.60 .18 3094100300058 7.499E+01 3.62 .16 3094100300059 8.414E+01 3.73 .17 3094100300060 9.441E+01 3.61 .18 3094100300061 1.059E+02 3.78 .17 3094100300062 1.189E+02 3.65 .17 3094100300063 1.334E+02 3.81 .18 3094100300064 1.496E+02 3.68 .18 3094100300065 1.679E+02 3.70 .17 3094100300066 1.884E+02 3.57 .19 3094100300067 2.113E+02 3.59 .18 3094100300068 2.371E+02 3.64 .19 3094100300069 2.661E+02 3.64 .17 3094100300070 2.985E+02 3.66 .19 3094100300071 3.351E+02 3.67 .17 3094100300072 ENDDATA 58 0 3094100300073 ENDSUBENT 72 0 3094100399999 ENDENTRY 3 0 3094199999999