ENTRY 31743 20150616 31723174300000001 SUBENT 31743001 20150616 31723174300100001 BIB 15 45 3174300100002 TITLE Thermal neutron scattering kernels for sapphire and 3174300100003 silicon single crystals 3174300100004 AUTHOR (F.Cantargi,J.R.Granada,R.E.Mayer) 3174300100005 INSTITUTE (3ARGCAB) 3174300100006 REFERENCE (J,ANE,80,43,2015) 3174300100007 #doi:10.1016/j.anucene.2015.01.020 3174300100008 FACILITY (LINAC,3ARGCAB) 25 MeV Electron LINAC based pulsed 3174300100009 neutron source. 50 Hz repetition rate. 3174300100010 - Nominal average beam energy = 25 MeV 3174300100011 - Watt fast-neutron spectrum 3174300100012 - Nominal average peak current = 4 uA 3174300100013 - Repetition rate (pulses per second) = 50 3174300100014 - Pulse width of electron beam = 1.4 us 3174300100015 INC-SOURCE (PHOTO) 3174300100016 - (g,n) on lead target 3174300100017 - Moderator: polyethylene slab shaped (2x21x21) cm3; 3174300100018 density 0.9183 g/cm3; temperature (293+-2) K 3174300100019 INC-SPECT - Watt fast-neutron spectrum 3174300100020 - Beam profile at the sample position: circular, 3174300100021 25mm diameter, uniform 3174300100022 SAMPLE Al2O3 sapphire single crystal of cylindrical geometry 3174300100023 (10 cm height and 10 cm diameter) placed at about 3174300100024 360 cm from the neutron source. 3174300100025 Sample temperature 293 +- 2 K. 3174300100026 METHOD (TOF) - Flight path = (827.2 +- 0.5) cm. 3174300100027 - Time-of-flight binning 5 us. 3174300100028 (TRN) 3174300100029 CORRECTION - The time-of-flight scale was corrected by the mean 3174300100030 emission time of the moderator. 3174300100031 - The TOF spectra were corrected by dead time effects 3174300100032 from detectors and electronics. 3174300100033 Less that 3% in every case. 3174300100034 DETECTOR (HE3SP) The detector bank consisted of several 3He 3174300100035 proportional counters (10 atm filling pressure, 3174300100036 15.24 cm active length, 2.54 cm diameter) placed at 3174300100037 835.0 +/- 0.2 cm from the neutron source and 3174300100038 475.0 +- 0.2 cm from the sample 3174300100039 ADD-RES The Debye model was also used to represent the 3174300100040 lattice dynamics. The frequency spectra for both, 3174300100041 aluminum and oxygen bounded in sapphire, were 3174300100042 represented with a Debye curve with Td = 1032 K 3174300100043 ERR-ANALYS (ERR-S) Quoted uncertainties are only due to statistics3174300100044 STATUS (TABLE) Fig.3 and Fig. 4 of the reference. 3174300100045 HISTORY (20150616C) 3174300100046 (20150716R) Data received from F.Cantargi 16 July 2015 3174300100047 ENDBIB 45 0 3174300100048 NOCOMMON 0 0 3174300100049 ENDSUBENT 48 0 3174300199999 SUBENT 31743002 20150616 31723174300200001 BIB 1 1 3174300200002 REACTION (13-AL-OXI(N,TOT),,SIG) 3174300200003 ENDBIB 1 0 3174300200004 COMMON 2 3 3174300200005 TEMP TEMP-ERR 3174300200006 K K 3174300200007 293. 2. 3174300200008 ENDCOMMON 3 0 3174300200009 DATA 3 50 3174300200010 EN DATA ERR-S 3174300200011 EV B B 3174300200012 0.0011 2.68 0.18 3174300200013 0.0014 2.58 0.15 3174300200014 0.0018 2.32 0.09 3174300200015 0.0022 2.04 0.06 3174300200016 0.0028 1.89 0.05 3174300200017 0.0035 1.69 0.04 3174300200018 0.0045 1.47 0.05 3174300200019 0.0056 1.37 0.03 3174300200020 0.0071 1.23 0.04 3174300200021 0.0089 1.15 0.03 3174300200022 0.0112 1.05 0.03 3174300200023 0.0141 1.04 0.02 3174300200024 0.0178 1.00 0.02 3174300200025 0.0224 0.99 0.02 3174300200026 0.0282 1.01 0.02 3174300200027 0.0355 1.10 0.02 3174300200028 0.0447 1.24 0.02 3174300200029 0.0562 1.56 0.02 3174300200030 0.0708 1.96 0.02 3174300200031 0.0891 2.51 0.02 3174300200032 0.1122 3.15 0.02 3174300200033 0.1413 4.05 0.02 3174300200034 0.1778 4.80 0.02 3174300200035 0.2239 5.93 0.03 3174300200036 0.2818 6.89 0.03 3174300200037 0.3548 8.03 0.03 3174300200038 0.4467 9.17 0.03 3174300200039 0.5623 10.08 0.03 3174300200040 0.7079 10.80 0.03 3174300200041 0.8913 11.58 0.04 3174300200042 1.1220 12.04 0.04 3174300200043 1.4125 12.47 0.04 3174300200044 1.778 12.79 0.04 3174300200045 2.238 13.06 0.05 3174300200046 2.818 13.25 0.04 3174300200047 3.548 13.48 0.05 3174300200048 4.466 13.49 0.05 3174300200049 5.623 13.56 0.05 3174300200050 7.0795 13.64 0.05 3174300200051 8.9125 13.63 0.05 3174300200052 11.2202 13.87 0.07 3174300200053 14.1254 13.72 0.07 3174300200054 17.7828 13.85 0.08 3174300200055 22.3872 13.88 0.06 3174300200056 28.1838 13.66 0.09 3174300200057 35.4813 13.85 0.07 3174300200058 44.6684 13.79 0.09 3174300200059 56.2341 13.93 0.07 3174300200060 70.7946 14.05 0.10 3174300200061 89.1251 14.06 0.11 3174300200062 ENDDATA 52 0 3174300200063 ENDSUBENT 62 0 3174300299999 ENDENTRY 2 0 3174399999999