ENTRY 30905 20090912 31413090500000001 SUBENT 30905001 20090912 31413090500100001 BIB 11 32 3090500100002 TITLE Measurement of the total neutron cross-section of 3090500100003 germanium at energies below 2 eV 3090500100004 AUTHOR (M.Salama) 3090500100005 INSTITUTE (3EGYCAI) 3090500100006 REFERENCE (J,AKE,42,(2),105,1983) 3090500100007 (W,SALAMA,19880626) Numerical data for total sigma. 3090500100008 SAMPLE Prepared from a spec pure polycrystalline Germanium 3090500100009 in fine powder form (grain size less than 10**(-4) cm. 3090500100010 The spectroscopic analysis of the used element showed 3090500100011 the presence of some impurities of low total cross 3090500100012 sections (Si: 15 ppm and less than 10 ppm for S, Ca, 3090500100013 Cr and Fe). The Germanium powder is packed in perspex 3090500100014 container with glass windows. One sample of thickness 3090500100015 2.90 gm/cm**2 corresponding to about 0.80 transmission 3090500100016 for 0.0253 eV neutron was prepared. For incident 3090500100017 intensity measurements, a glass plate of the same 3090500100018 thickness has been used to eliminate the effect of the 3090500100019 lateral glass plates of the container. Germanium has 3090500100020 a diamond type structure crystallised in the cubic 3090500100021 system with cell edge a0 = 5.6576 Angstrom and related 3090500100022 to the space group 9OH - FD3M.8 atoms are present per 3090500100023 unit cell of coordinates (0, 0, 0, 1/4, 1/4, 1/4). 3090500100024 MONITOR Absolute transmission measurement 3090500100025 FACILITY (REAC,3EGYCAI) Thermal reactor ET-RR-1 3090500100026 METHOD (TOF,TRN) Transmission method using a chopper 3090500100027 time-of-flight spectrometer. 3090500100028 Spectrometer flight was 8.1 m. 3090500100029 DETECTOR (HE3SP) He3 gas filled neutron detector 3090500100030 ERR-ANALYS No description of error analysis. 3090500100031 HISTORY (19880804C) TMK 3090500100032 (19890420A) VOF.-Reactions' codes corrected 3090500100033 (20090912A) SD:Updated to new date formats,lower case. 3090500100034 ENDBIB 32 0 3090500100035 COMMON 1 3 3090500100036 TEMP 3090500100037 DEG-C 3090500100038 20. 3090500100039 ENDCOMMON 3 0 3090500100040 ENDSUBENT 39 0 3090500199999 SUBENT 30905002 20090912 31413090500200001 BIB 3 10 3090500200002 REACTION (32-GE-0(N,TOT),,SIG) 3090500200003 COMMENT Fig. of cross-section vs. neutron wavelength and energy3090500200004 of range 2.2 eV to 7 milli-eV is given in journal 3090500200005 Atomkernenergie/Kerntechnik vol. 42 (1983) No. 2, 3090500200006 p. 105. At neutron energies between 1.2 eV to 0.20 eV, 3090500200007 the cross section behaviour showed an evidence for 3090500200008 1/v thermal slope given as: 3090500200009 sig = ((8.40 +- 0.29) +- (1.54 +- 0.06)/root(E)) B3090500200010 STATUS (TABLE) Data taken from private communication, 3090500200011 Dr.M.Salama, 26 June 1988. 3090500200012 ENDBIB 10 0 3090500200013 NOCOMMON 0 0 3090500200014 DATA 2 108 3090500200015 EN DATA 3090500200016 EV B 3090500200017 2.2461 8.70 3090500200018 1.7247 8.20 3090500200019 1.4375 8.00 3090500200020 1.1880 8.20 3090500200021 0.9982 8.40 3090500200022 0.8506 8.51 3090500200023 0.7334 8.30 3090500200024 0.6389 8.70 3090500200025 0.5632 8.04 3090500200026 0.4974 8.88 3090500200027 0.4436 9.26 3090500200028 0.3982 8.93 3090500200029 0.3593 9.19 3090500200030 0.3259 9.32 3090500200031 0.2970 9.70 3090500200032 0.2717 9.52 3090500200033 0.2495 9.40 3090500200034 0.2300 9.54 3090500200035 0.2126 9.72 3090500200036 0.1972 9.96 3090500200037 0.1833 9.96 3090500200038 0.1709 9.71 3090500200039 0.1579 9.67 3090500200040 0.1495 9.46 3090500200041 0.1403 9.28 3090500200042 0.1317 9.01 3090500200043 0.1243 8.93 3090500200044 0.1173 9.04 3090500200045 0.1109 8.97 3090500200046 0.1050 9.02 3090500200047 0.0995 8.97 3090500200048 0.0945 8.82 3090500200049 0.0898 9.01 3090500200050 0.0855 8.54 3090500200051 0.0814 8.64 3090500200052 0.0777 8.59 3090500200053 0.0742 8.76 3090500200054 0.0709 8.63 3090500200055 0.0679 8.13 3090500200056 0.0650 8.18 3090500200057 0.0624 8.41 3090500200058 0.0598 8.43 3090500200059 0.0575 7.87 3090500200060 0.0552 8.27 3090500200061 0.0531 8.07 3090500200062 0.0511 8.08 3090500200063 0.0492 8.15 3090500200064 0.0475 8.20 3090500200065 0.0458 8.22 3090500200066 0.0442 8.17 3090500200067 0.0427 8.15 3090500200068 0.0413 8.16 3090500200069 0.0394 8.27 3090500200070 0.0386 8.20 3090500200071 0.0374 8.04 3090500200072 0.0362 8.16 3090500200073 0.0351 7.86 3090500200074 0.0340 7.66 3090500200075 0.0330 6.91 3090500200076 0.0320 7.61 3090500200077 0.0310 7.57 3090500200078 0.0302 7.42 3090500200079 0.0293 8.10 3090500200080 0.0285 7.82 3090500200081 0.0277 7.72 3090500200082 0.0269 7.39 3090500200083 0.0262 7.30 3090500200084 0.0255 7.48 3090500200085 0.0248 7.53 3090500200086 0.0242 7.40 3090500200087 0.0236 7.40 3090500200088 0.0230 7.20 3090500200089 0.0224 6.82 3090500200090 0.0219 5.21 3090500200091 0.0213 4.98 3090500200092 0.0208 4.91 3090500200093 0.0203 4.99 3090500200094 0.0198 5.11 3090500200095 0.0194 5.29 3090500200096 0.0189 5.36 3090500200097 0.0185 5.29 3090500200098 0.0181 6.47 3090500200099 0.0177 5.68 3090500200100 0.0173 5.72 3090500200101 0.0169 5.84 3090500200102 0.0166 5.89 3090500200103 0.0162 5.88 3090500200104 0.0159 5.97 3090500200105 0.0155 5.92 3090500200106 0.0152 5.94 3090500200107 0.0149 5.70 3090500200108 0.0146 5.68 3090500200109 0.0143 5.85 3090500200110 0.0138 5.80 3090500200111 0.0133 5.61 3090500200112 0.0127 6.83 3090500200113 0.0123 6.81 3090500200114 0.0118 5.63 3090500200115 0.0114 4.44 3090500200116 0.0110 3.74 3090500200117 0.0106 3.18 3090500200118 0.0103 2.99 3090500200119 0.00998 2.63 3090500200120 0.0096 3.27 3090500200121 0.0093 3.18 3090500200122 0.0091 3.76 3090500200123 0.0080 4.91 3090500200124 0.0073 4.41 3090500200125 ENDDATA 110 0 3090500200126 ENDSUBENT 125 0 3090500299999 SUBENT 30905003 20090912 31413090500300001 BIB 3 6 3090500300002 REACTION (32-GE-0(N,TOT),,SIG,,MXW,DERIV) 3090500300003 COMMENT Given data is in good agreement within statistical 3090500300004 error with the value (9.80 +- 0.40) b of Mughabghab, 3090500300005 S.F., D.I.Garber: BNL - 325(1976) 3090500300006 STATUS (DEP,30905002) 3090500300007 (TABLE) Data from the text of AKE,42,(2),105,1983 3090500300008 ENDBIB 6 0 3090500300009 COMMON 1 3 3090500300010 KT 3090500300011 EV 3090500300012 0.0253 3090500300013 ENDCOMMON 3 0 3090500300014 DATA 2 1 3090500300015 DATA DATA-ERR 3090500300016 B B 3090500300017 9.69 0.31 3090500300018 ENDDATA 3 0 3090500300019 ENDSUBENT 18 0 3090500399999 SUBENT 30905004 20090912 31413090500400001 BIB 3 17 3090500400002 REACTION (32-GE-0(N,THS)32-GE-0,,SIG,,MXW,DERIV) 3090500400003 COMMENT Given data is in good agreement with the value 8.50 b 3090500400004 of Shull,C.G., E.O.Wollan: Phys. Rev. 81(1950) 527 in 3090500400005 Neutron Diffraction and Transmission Studies as well as3090500400006 with the value of (8.6 +- 0.50) b reported in Neutron 3090500400007 Cross-Sections, AECU 2040 (1952). 3090500400008 Using sig(a) = (2.23 +- 0.18) b of Pomerance,H.: 3090500400009 Phys. Rev. 83 (1951) 641 - 645 in pile oscillator 3090500400010 measurements, sig(s) = (7.46 +- 0.16) b was obtained 3090500400011 and good agreement with (7.5 +- 0.20) b of Second 3090500400012 International Conference on Nuclear Data for Reactors, 3090500400013 Conf. Proc. vol. 1(1970) Helsinki and is slightly 3090500400014 lower than 9.0 b of Hughes,D.J., R.Schwartz: Neutron 3090500400015 Cross-Sections. BNL - 325, 2nd. Edition (1958), 3090500400016 Supplement (1960) and Supplement no. 2 (1966) 3090500400017 STATUS (DEP,30905002) 3090500400018 (TABLE) Data from the text of AKE,42,(2),105,1983 3090500400019 ENDBIB 17 0 3090500400020 COMMON 1 3 3090500400021 EN 3090500400022 EV 3090500400023 0.0253 3090500400024 ENDCOMMON 3 0 3090500400025 DATA 2 1 3090500400026 DATA DATA-ERR 3090500400027 B B 3090500400028 8.40 0.29 3090500400029 ENDDATA 3 0 3090500400030 ENDSUBENT 29 0 3090500499999 SUBENT 30905005 20090912 31413090500500001 BIB 3 13 3090500500002 REACTION (32-GE-0(N,THS)32-GE-0,,SIG,,MXW,CALC) 3090500500003 Author designated as average scattering cross section 3090500500004 COMMENT Given data was obtained by using 3090500500005 sig(a) = (2.23 +- 0.18) b of Pomerance,H.: Phys. Rev. 3090500500006 83(1951) 641-645. Given data is in good agreement 3090500500007 with (7.5 +- 0.2) b of Mughabghab,S.F., D.I.Garber: 3090500500008 BNL - 325 (1976), however disagree with (3 +- 1) b of 3090500500009 Neutron Cross-Sections, AECU 2040 (1952) and Hughes, 3090500500010 D.J., R.Schwartz: Neutron Cross-Sections. BNL - 325, 3090500500011 2nd. Edition (1958), Supplement (1960) and Supplement 3090500500012 no. 2 (1966) 3090500500013 STATUS (TABLE) Data taken from journal 3090500500014 Atomkernenergie/Kerntechnik vol. 42 (1983) No. 2, p.1053090500500015 ENDBIB 13 0 3090500500016 COMMON 1 3 3090500500017 EN 3090500500018 EV 3090500500019 0.0253 3090500500020 ENDCOMMON 3 0 3090500500021 DATA 2 1 3090500500022 DATA DATA-ERR 3090500500023 B B 3090500500024 7.46 0.6 3090500500025 ENDDATA 3 0 3090500500026 ENDSUBENT 25 0 3090500599999 SUBENT 30905006 20090912 31413090500600001 BIB 3 7 3090500600002 REACTION (32-GE-0(N,THS)32-GE-0,COH,AMP,,MXW) 3090500600003 COMMENT Given data is in good agreement within statistical 3090500600004 error with (8.18 +- 0.0036) F of Mughabghab,S.F., 3090500600005 D.I.Garber: BNL- 325 (1976) and 8.4 F of Shull,C.G., 3090500600006 E.O.Wollan: Phys. Rev. 81 (1950) 527. 3090500600007 STATUS (TABLE) Data taken from journal 3090500600008 Atomkernenergie/Kerntechnik, vol.42(1983) No 2,p.105. 3090500600009 ENDBIB 7 0 3090500600010 COMMON 1 3 3090500600011 EN 3090500600012 EV 3090500600013 0.0253 3090500600014 ENDCOMMON 3 0 3090500600015 DATA 2 1 3090500600016 DATA DATA-ERR 3090500600017 FERMI FERMI 3090500600018 8.38 1.2 3090500600019 ENDDATA 3 0 3090500600020 ENDSUBENT 19 0 3090500699999 SUBENT 30905007 20090912 31413090500700001 BIB 3 7 3090500700002 REACTION (32-GE-0(N,THS)32-GE-0,COH,SIG,,MXW) 3090500700003 COMMENT Given data is in good agreement within statistical 3090500700004 error with (8.41 +- 0.05) b of Mughabghab,S.F., 3090500700005 D.I.Garber: BNL - 325 (1976) and 8.8 b of Shull,C.G., 3090500700006 E.O.Wollan: Phys. Rev. 81 (1950) 527. 3090500700007 STATUS (TABLE) Data taken from journal 3090500700008 Atomkernenergie.Kerntechnik, vol.42(1983) No 2,p.105. 3090500700009 ENDBIB 7 0 3090500700010 COMMON 1 3 3090500700011 EN 3090500700012 EV 3090500700013 0.0253 3090500700014 ENDCOMMON 3 0 3090500700015 DATA 2 1 3090500700016 DATA DATA-ERR 3090500700017 B B 3090500700018 8.41 0.05 3090500700019 ENDDATA 3 0 3090500700020 ENDSUBENT 19 0 3090500799999 ENDENTRY 7 0 3090599999999