ENTRY 23425 20180924 22722342500000001 SUBENT 23425001 20180924 22722342500100001 BIB 14 53 2342500100002 TITLE The forward scattering of cold neutrons by mixtures of2342500100003 light and heavy water 2342500100004 AUTHOR (R.P.May, K.Ibel, J.Haas) 2342500100005 REFERENCE (J,JAC,15,15,1982) 2342500100006 INSTITUTE (2FR ILL) 2342500100007 FACILITY (REAC,2FR ILL) High flux reactor in Grenoble 2342500100008 Mechanical velocity selector 2342500100009 DETECTOR (BF3) Multidetector of gas-amplification type filled 2342500100010 with BF3, around 3800 elements each of 1 cm2 area, 2342500100011 detection efficiency 45-90 % for neutron wavelength 2342500100012 0.7 -1 nm . 2342500100013 Distance detector-sample 10.5 m for transmission , 2342500100014 2.53 m for scattering experiments. 2342500100015 Solid angle 4.7E-3 times of the full solid angle 4PI. 2342500100016 METHOD (TRN) Typical measuring time 5min for transmission, 2342500100017 20 min for scattering experiment. 2342500100018 INC-SOURCE Beam cross section was determined by sample aperture 2342500100019 to be 8.5 x 9.5 mm . 2342500100020 For transmission - primary beam was attenuated by 2342500100021 Cd plate of 1 mm thickness, 3 x 5 cm size, with 15 2342500100022 small holes. Fraction of 1.0 nm neutrons transmitted 2342500100023 1/1100 +-4% . 2342500100024 SAMPLE H(2)O/D(2)O in quartz cells (HELLMA type 100-QS) 2342500100025 surrounded by Cd. Neutron pathway within cells was 2342500100026 1.00mm+-0.5% . For D(2)O rich - cells of 2.00 mm 2342500100027 thickness.Cylindrical cells of 0.50 mm thickness -for 2342500100028 few measurements on samples rich in H(2)O and neutrons 2342500100029 of 1.0 nm wavelength. 2342500100030 Molecular density (1/30)*10**24 water molecules per cm32342500100031 CORRECTION For scattering experiment: 2342500100032 for background via diaphragm and cell windows by 2342500100033 subtracting weighted spectrum taken with an empty cell.2342500100034 Other - checked with Cd in sample position -negligible 2342500100035 ERR-ANALYS (DATA-ERR) Type of error is not explained in the 2342500100036 article. 2342500100037 ADD-RES The total cross section dependence from D(2)O 2342500100038 fraction in sample for 1.0, 0.7, 0.45 nm wavelength 2342500100039 neutrons - on Fig.3 of J.of Applied Crystallography, 2342500100040 15,15,1982 2342500100041 COMMENT Of compiler M.M. EN was calculated by compiler : 2342500100042 EN(eV)=0.0818/((Wave/Angstrom)**2), Angstrom=10**-10 m:2342500100043 En, eV Wave length, m 2342500100044 0.00404 0.45 E-9 2342500100045 0.00327 0.50 E-9 2342500100046 0.00227 0.60 E-9 2342500100047 0.00167 0.70 E-9 2342500100048 0.00128 0.80 E-9 2342500100049 0.00101 0.90 E-9 2342500100050 8.18E-4 1.00 E-9 2342500100051 5.68E-4 1.20 E-9 2342500100052 but values were deleted from DATA block according to a 2342500100053 comment of N.Otsuka (NDS, IAEA) . 2342500100054 HISTORY (20180924C) M.M. 2342500100055 ENDBIB 53 0 2342500100056 NOCOMMON 0 0 2342500100057 ENDSUBENT 56 0 2342500199999 SUBENT 23425002 20180924 22722342500200001 BIB 3 10 2342500200002 REACTION (1-H-WTR(N,TOT),,SIG) 2342500200003 Wave length dependence of the total cross section 2342500200004 at temperature 281.8 K 2342500200005 Neutron wavelength digitized. 2342500200006 REL-REF (A,,,R,BNL-325,1976) Editors D.I.Gaber,R.R.Kinsey, 2342500200007 Neutron Cross Sections, v.II, BNL-325, 3rd edition. 2342500200008 (A,,K.Heinloth,J,ZP,163,218,1961) 2342500200009 Values at 291 K temperature 2342500200010 Neutron wavelength digitized. 2342500200011 STATUS (CURVE)Fig.1 of J.of Applied Crystallography,15,15,19822342500200012 ENDBIB 10 0 2342500200013 COMMON 1 3 2342500200014 ERR-DIG 2342500200015 B 2342500200016 0.147 2342500200017 ENDCOMMON 3 0 2342500200018 DATA 3 6 2342500200019 WVE-LN DATA DATA-ERR 2342500200020 M B B 2342500200021 0.45 E-09 175.43 0.8902 2342500200022 0.50 E-09 180.72 1.1869 2342500200023 0.60 E-09 194.29 1.1869 2342500200024 0.70 E-09 206.96 1.1869 2342500200025 0.80 E-09 216.66 0.8902 2342500200026 0.90 E-09 228.44 1.1869 2342500200027 ENDDATA 8 0 2342500200028 ENDSUBENT 27 0 2342500299999 SUBENT 23425003 20180924 22722342500300001 BIB 3 10 2342500300002 REACTION (1-H-D2O(N,TOT),,SIG) 2342500300003 Wave length dependence of the total cross section 2342500300004 at temperature 281.8 K 2342500300005 Neutron wavelength digitized. 2342500300006 REL-REF (A,,D.I.Gaber+,R,BNL-325,1976) 2342500300007 Editors D.I.Gaber,R.R.Kinsey, 2342500300008 Neutron Cross Sections, v.II, BNL-325, 3rd edition. 2342500300009 (A,,K.Heinloth,J,ZP,163,218,1961) 2342500300010 Values at 291 K temperature 2342500300011 STATUS (CURVE)Fig.1 of J.of Applied Crystallography,15,15,19822342500300012 ENDBIB 10 0 2342500300013 COMMON 1 3 2342500300014 ERR-DIG 2342500300015 B 2342500300016 0.0142 2342500300017 ENDCOMMON 3 0 2342500300018 DATA 3 8 2342500300019 WVE-LN DATA DATA-ERR 2342500300020 M B B 2342500300021 0.45 E-9 21.356 0.84080 2342500300022 0.50 E-9 21.773 0.81078 2342500300023 0.60 E-9 21.975 0.99095 2342500300024 0.70 E-9 20.885 0.99095 2342500300025 0.80 E-9 18.535 0.84080 2342500300026 0.90 E-9 18.737 0.93077 2342500300027 1.00 E-9 18.819 0.96080 2342500300028 1.20 E-9 19.013 0.87071 2342500300029 ENDDATA 10 0 2342500300030 ENDSUBENT 29 0 2342500399999 SUBENT 23425004 20180924 22722342500400001 BIB 2 4 2342500400002 REACTION (1-H-WTR(N,TOT),,SIG,,TMP) 2342500400003 Temperature dependence of the total cross section 2342500400004 for 1.0 nm wavelength neutrons 2342500400005 STATUS (CURVE)Fig.2 of J.of Applied Crystallography,15,15,19822342500400006 ENDBIB 4 0 2342500400007 COMMON 2 3 2342500400008 WVE-LN ERR-DIG 2342500400009 M B 2342500400010 1.E-09 0.027 2342500400011 ENDCOMMON 3 0 2342500400012 DATA 3 6 2342500400013 TEMP DATA DATA-ERR 2342500400014 K B B 2342500400015 281.76 234.86 1.428 2342500400016 282.98 237.00 1.488 2342500400017 284.26 237.42 1.250 2342500400018 285.43 239.26 1.309 2342500400019 293.06 245.86 1.369 2342500400020 298.01 250.92 1.488 2342500400021 ENDDATA 8 0 2342500400022 ENDSUBENT 21 0 2342500499999 ENDENTRY 4 0 2342599999999