ENTRY 30784 20090909 31413078400000001 SUBENT 30784001 20090909 31413078400100001 BIB 12 26 3078400100002 TITLE Measurement of the total neutron cross-section of 3078400100003 selenium at neutron energies below 2 eV 3078400100004 AUTHOR (M.Salama) 3078400100005 INSTITUTE (3EGYCAI) 3078400100006 REFERENCE (J,AKE,42,(3),187,1983) 3078400100007 (W,SALAMA,19880626) Numerical data for total sig. 3078400100008 SAMPLE Two samples of thickness 2.08 g/cm2 and 1.36 g/cm2 3078400100009 used. Prepared from a spec fine powder(grain size less 3078400100010 than 10**(-4) cm.). Spectroscopic analysis of selenium:3078400100011 C<0.01%, Al,Si<0.002% and B,Ba,Ca,Cu,Fe<0.001%. 3078400100012 Selenium crystalizes in hexagonal system with cell 3078400100013 constants a0 = 4.954 Angstrom related to the space 3078400100014 group d(4)(3)-p3(1)-21 with the position of the atoms 3078400100015 located at (x,0,1/3, 0,x,2/3, x(bar),x(bar),0). 3078400100016 MONITOR Absolute transmission measurement. 3078400100017 FACILITY (REAC,3EGYCAI) ET-RR-1 reactor 3078400100018 METHOD (TOF,TRN) Transmission method in connection with a 3078400100019 time-of-flight spectrometer. 3078400100020 Mechanical chopper 3078400100021 DETECTOR (HE3SP)He3 gas filled neutron detector, placed at 3078400100022 the end of 8.1 m flight path. 3078400100023 ERR-ANALYS No description of error analysis. 3078400100024 STATUS (TABLE) Given data is taken from Jour. of 3078400100025 Atomkernenergie. Kerntechnik vol. 42(1983) No.3, p.187.3078400100026 HISTORY (19880602C) TMK 3078400100027 (20090725A) SD:Updated to new date formats,lower case. 3078400100028 ENDBIB 26 0 3078400100029 COMMON 1 3 3078400100030 TEMP 3078400100031 DEG-C 3078400100032 20. 3078400100033 ENDCOMMON 3 0 3078400100034 ENDSUBENT 33 0 3078400199999 SUBENT 30784002 20090909 31413078400200001 BIB 3 11 3078400200002 REACTION (34-SE-0(N,TOT),,SIG) 3078400200003 COMMENT Fig. of cross-section vs. neutron wavelength and energy3078400200004 given in jour. Atomkernenergie.Kerntechnik vol. 42 3078400200005 (1983) No.3, p.187. At neutron energies between 2.2 eV3078400200006 and 0.2 eV, the data were fitted by Least Square 3078400200007 method. The expression obtained for the thermal total 3078400200008 cross section was found to be 3078400200009 sig(t) = ((8.66 +- 0.25) + (1.94 +- 0.05)/root(E))b 3078400200010 STATUS (TABLE) Given data obtained by private communication, 3078400200011 M.Salama, 26 June 1988. This data correspond to fig. 1 3078400200012 of Atomkernenergie, vol. 42(1983) No. 3 3078400200013 ENDBIB 11 0 3078400200014 NOCOMMON 0 0 3078400200015 DATA 2 80 3078400200016 EN DATA 3078400200017 EV B 3078400200018 2.2461 10.3901 3078400200019 1.7247 11.1186 3078400200020 1.4375 11.2559 3078400200021 0.8506 12.1006 3078400200022 0.6389 10.6132 3078400200023 0.5632 10.6519 3078400200024 0.3982 10.7012 3078400200025 0.2970 10.7181 3078400200026 0.2495 11.8959 3078400200027 0.2126 12.1130 3078400200028 0.1972 12.4263 3078400200029 0.1833 12.6190 3078400200030 0.1709 12.8569 3078400200031 0.1495 12.7570 3078400200032 0.1403 13.71669 3078400200033 0.1243 13.1104 3078400200034 0.1173 12.8857 3078400200035 0.1109 12.8184 3078400200036 0.1050 12.8582 3078400200037 0.0995 13.5023 3078400200038 0.0945 13.2856 3078400200039 0.0898 14.1684 3078400200040 0.0814 15.0564 3078400200041 0.0777 15.0089 3078400200042 0.0742 15.0269 3078400200043 0.0679 15.1543 3078400200044 0.0650 15.7996 3078400200045 0.0624 15.0507 3078400200046 0.0598 17.0176 3078400200047 0.0575 15.2099 3078400200048 0.0552 16.0075 3078400200049 0.0531 16.1716 3078400200050 0.0511 16.2925 3078400200051 0.0492 16.4089 3078400200052 0.0475 16.6053 3078400200053 0.0458 16.7483 3078400200054 0.0442 17.5304 3078400200055 0.0418 18.4994 3078400200056 0.0374 18.4475 3078400200057 0.0362 18.4419 3078400200058 0.0351 18.6108 3078400200059 0.0330 18.3781 3078400200060 0.0302 18.2016 3078400200061 0.0293 19.3798 3078400200062 0.0285 19.9460 3078400200063 0.0277 19.9024 3078400200064 0.0262 19.8527 3078400200065 0.0255 19.6896 3078400200066 0.0248 21.3917 3078400200067 0.0242 20.2061 3078400200068 0.0236 21.8843 3078400200069 0.0230 22.9024 3078400200070 0.0224 22.1087 3078400200071 0.0203 22.872 3078400200072 0.0194 21.9674 3078400200073 0.0185 23.4928 3078400200074 0.0177 24.2466 3078400200075 0.0169 23.6801 3078400200076 0.0162 23.2870 3078400200077 0.0155 23.2204 3078400200078 0.0149 23.1926 3078400200079 0.0143 23.4596 3078400200080 0.0138 24.0910 3078400200081 0.0127 25.2146 3078400200082 0.0123 25.1372 3078400200083 0.0118 28.6236 3078400200084 0.0114 26.4103 3078400200085 0.0110 25.0086 3078400200086 0.00998 26.5862 3078400200087 0.0096 29.4736 3078400200088 0.0091 30.5896 3078400200089 0.0088 28.6807 3078400200090 0.0085 30.1048 3078400200091 0.0082 31.4145 3078400200092 0.0080 32.680 3078400200093 0.00778 33.7637 3078400200094 0.0067 33.267 3078400200095 0.00655 32.827 3078400200096 0.0056 32.1978 3078400200097 0.00547 33.5303 3078400200098 ENDDATA 82 0 3078400200099 ENDSUBENT 98 0 3078400299999 SUBENT 30784003 20090909 31413078400300001 BIB 4 6 3078400300002 REACTION (34-SE-0(N,TOT),,SIG,,MXW,DERIV) 3078400300003 REL-REF (A,,S.F.Mughabghab+,R,BNL-325,,1976) 3078400300004 COMMENT The given data is in good agreement within statistical 3078400300005 error with that of (21.40 +- 1.00) b of Mughabghab, 3078400300006 S.F., D.I.Garber: BNL - 325(1976) 3078400300007 STATUS (DEP,30784002) 3078400300008 ENDBIB 6 0 3078400300009 COMMON 1 3 3078400300010 EN 3078400300011 EV 3078400300012 0.0253 3078400300013 ENDCOMMON 3 0 3078400300014 DATA 2 1 3078400300015 DATA DATA-ERR 3078400300016 B B 3078400300017 20.86 0.56 3078400300018 ENDDATA 3 0 3078400300019 ENDSUBENT 18 0 3078400399999 SUBENT 30784004 20090909 31413078400400001 BIB 3 16 3078400400002 REACTION (34-SE-0(N,ABS),,SIG,,MXW,DERIV) 3078400400003 COMMENT The given data is in good agreement within statistical 3078400400004 error with the value (12.1 +- 0.30) b of Pomerance, 3078400400005 H.: Phys. Rev. 83 (1951) 641 - 645) using the pile 3078400400006 oscillator method, also in agreement within 3078400400007 statistical error with the value (11.80 +- 0.40) b of 3078400400008 Hughes,D.J., R.Schwartz: Neutron Cross-Sections, 3078400400009 BNL-325.,to be slightly higher than the values 3078400400010 (11.50 +- 0.10) b of Lapointe,C.,F.Rasetti: Phys. Rev.3078400400011 58 (1940) 554 and that of (11.70 +- 0.10) b of 3078400400012 Meadows,J.W., J.F.Wolem: Nucl. Sci. and Eng. 9 (1961) 3078400400013 132. 3078400400014 Comment by compiler 3078400400015 Data given in Table and discussion is slightly 3078400400016 different. Given in Table is (12.29 +- 0.31) b. 3078400400017 STATUS (DEP,30784002) 3078400400018 ENDBIB 16 0 3078400400019 COMMON 1 3 3078400400020 EN 3078400400021 EV 3078400400022 0.0253 3078400400023 ENDCOMMON 3 0 3078400400024 DATA 2 1 3078400400025 DATA DATA-ERR 3078400400026 B B 3078400400027 12.20 0.31 3078400400028 ENDDATA 3 0 3078400400029 ENDSUBENT 28 0 3078400499999 SUBENT 30784005 20090909 31413078400500001 BIB 2 2 3078400500002 REACTION (34-SE-0(N,THS)34-SE-0,FA,SIG,,MXW,DERIV) 3078400500003 STATUS (DEP,30784002) 3078400500004 ENDBIB 2 0 3078400500005 COMMON 1 3 3078400500006 EN 3078400500007 EV 3078400500008 0.0253 3078400500009 ENDCOMMON 3 0 3078400500010 DATA 2 1 3078400500011 DATA DATA-ERR 3078400500012 B B 3078400500013 8.66 0.25 3078400500014 ENDDATA 3 0 3078400500015 ENDSUBENT 14 0 3078400599999 SUBENT 30784006 20090909 31413078400600001 BIB 3 16 3078400600002 REACTION (34-SE-0(N,THS)34-SE-0,BA,SIG,,MXW,DERIV) 3078400600003 COMMENT Given data is obtained after applying the correction 3078400600004 factor term (A+1/A)**2. 3078400600005 Given data was found to be in good agreement within 3078400600006 statistical errors with the value (9 +- 1) b of 3078400600007 Egelstaff,P.A.: AERE, N/R 1147 (1958) and that of 3078400600008 (8.00 +- 1.00) of Hughes,D.J., R.Schwartz: Neutron 3078400600009 Cross-Sections, BNL- 325, 2nd ed. (1958), Supplement 3078400600010 (1960) and Supplement no. 2(1966) Slightly higher 3078400600011 than the sig(S)(free) values of Koester,L.,K.Knoph, 3078400600012 W.Waschowski: Z. Phys. A 296, 1(1980)43., after 3078400600013 being corrected by (A+1/A)**2. 3078400600014 Comment by compiler: 3078400600015 Data given in Table and discussion is slightly 3078400600016 different. given in Table is (8.66 +- 0.25) b. 3078400600017 STATUS (DEP,30784002) 3078400600018 ENDBIB 16 0 3078400600019 COMMON 1 3 3078400600020 EN 3078400600021 EV 3078400600022 0.0253 3078400600023 ENDCOMMON 3 0 3078400600024 DATA 2 1 3078400600025 DATA DATA-ERR 3078400600026 B B 3078400600027 8.88 0.25 3078400600028 ENDDATA 3 0 3078400600029 ENDSUBENT 28 0 3078400699999 SUBENT 30784007 20090909 31413078400700001 BIB 3 13 3078400700002 REACTION (34-SE-0(N,THS)34-SE-0,,SIG,,MXW,DERIV) 3078400700003 Author designated as average scattering cross section 3078400700004 COMMENT Given data was found to be in agreement within 3078400700005 statistical errors with the value of (9.70 +- 1.0) b 3078400700006 of Mughabghab,S.F.,D.I.Garber: BNL-325(1976) and in 3078400700007 reasonable agreement within statistical errors with 3078400700008 that of (11.00 +- 2.00) b. Noticeable disagreement with3078400700009 the value of (13.00 +- 1.00) b of neutron cross 3078400700010 sections, AECU 2040 (Office of Technical Services, 3078400700011 Oak Ridge, Tenn.) (1952). (7.70+- 0.08) b of Koester, 3078400700012 L., K.Knoph, W.Waschowski: Z.Phys. A296,1(1980) 43 3078400700013 seems to be lower than the given value 3078400700014 STATUS (DEP,30784002) 3078400700015 ENDBIB 13 0 3078400700016 COMMON 1 3 3078400700017 EN 3078400700018 EV 3078400700019 0.0253 3078400700020 ENDCOMMON 3 0 3078400700021 DATA 2 1 3078400700022 DATA DATA-ERR 3078400700023 B B 3078400700024 9.07 0.30 3078400700025 ENDDATA 3 0 3078400700026 ENDSUBENT 25 0 3078400799999 SUBENT 30784008 20090909 31413078400800001 BIB 3 9 3078400800002 REACTION (34-SE-0(N,THS)34-SE-0,COH,AMP,,MXW,DERIV) 3078400800003 COMMENT Given data is in agreement within statistical errors 3078400800004 with (7.47 +- 4.00) F of Egelstaff, P.A.: AERE, 3078400800005 N/R 1147 (1958) and also with that of (8.10 +- 0.05) F 3078400800006 of Mughabghab,S.F., D.I.Garber: BNL-325 (1976). 3078400800007 also in agreement within statistical errors with 3078400800008 (7.97 +- 0.009) F of Koester, L.K.Knoph, 3078400800009 W.Waschowski: Z.Phys. A296, 1(1980)43 3078400800010 STATUS (DEP,30784002) 3078400800011 ENDBIB 9 0 3078400800012 COMMON 1 3 3078400800013 EN 3078400800014 EV 3078400800015 0.0253 3078400800016 ENDCOMMON 3 0 3078400800017 DATA 2 1 3078400800018 DATA DATA-ERR 3078400800019 FERMI FERMI 3078400800020 8.23 0.23 3078400800021 ENDDATA 3 0 3078400800022 ENDSUBENT 21 0 3078400899999 SUBENT 30784009 20090909 31413078400900001 BIB 3 9 3078400900002 REACTION (34-SE-0(N,THS)34-SE-0,COH,SIG,,MXW,DERIV) 3078400900003 COMMENT Given data is in agreement within statistical errors 3078400900004 with (7.00 +- 2.00) b of Egelstaff,P.A.: AERE, 3078400900005 N/R 1147 (1958) and also with that of (8.24 +- 0.0003)b3078400900006 of Mughabghab,S.F., D.I.Garber: BNL-325(1976). Also in 3078400900007 agreement within statistical errors with 3078400900008 (7.88 +- 0.001) b of Koester,L., K.Knoph, W.Waschowski3078400900009 Z.Phys. A296(1980) 43. 3078400900010 STATUS (DEP,30784002) 3078400900011 ENDBIB 9 0 3078400900012 COMMON 1 3 3078400900013 EN 3078400900014 EV 3078400900015 0.0253 3078400900016 ENDCOMMON 3 0 3078400900017 DATA 2 1 3078400900018 DATA DATA-ERR 3078400900019 B B 3078400900020 8.51 0.66 3078400900021 ENDDATA 3 0 3078400900022 ENDSUBENT 21 0 3078400999999 SUBENT 30784010 20090909 31413078401000001 BIB 3 11 3078401000002 REACTION (34-SE-0(N,THS)34-SE-0,INC,SIG,,MXW,DERIV) 3078401000003 COMMENT The error in the estimation of this value is large 3078401000004 and of the order of the cross section value, therefore 3078401000005 the incoherent scattering cross section could be 3078401000006 neglected. It is good agreement with isotopical 3078401000007 incoherent cross section of ordinary selenium 3078401000008 (9.32 +- 0.10) b and total incoherent bound 3078401000009 cross section of selenium (0.35 +- 0.10) b of 3078401000010 Koester L., K.Knoph, W.Waschowski: Z.Phys. A296, 3078401000011 1(1980) 43. 3078401000012 STATUS (DEP,30784002) 3078401000013 ENDBIB 11 0 3078401000014 COMMON 1 3 3078401000015 EN 3078401000016 EV 3078401000017 0.0253 3078401000018 ENDCOMMON 3 0 3078401000019 DATA 1 1 3078401000020 DATA 3078401000021 B 3078401000022 0.37 3078401000023 ENDDATA 3 0 3078401000024 ENDSUBENT 23 0 3078401099999 SUBENT 30784011 20090909 31413078401100001 BIB 2 2 3078401100002 REACTION (34-SE-0(N,EL)34-SE-0,POT,SIG,,,DERIV) 3078401100003 STATUS (DEP,30784002) 3078401100004 ENDBIB 2 0 3078401100005 COMMON 2 3 3078401100006 EN-MIN EN-MAX 3078401100007 EV EV 3078401100008 0.03 0.60 3078401100009 ENDCOMMON 3 0 3078401100010 DATA 2 1 3078401100011 DATA DATA-ERR 3078401100012 B B 3078401100013 5.95 0.30 3078401100014 ENDDATA 3 0 3078401100015 ENDSUBENT 14 0 3078401199999 SUBENT 30784012 20090909 31413078401200001 BIB 3 13 3078401200002 REACTION (34-SE-0(N,EL)34-SE-0,POT,RAD,,,DERIV) 3078401200003 COMMENT Given data is slightly higher than that 5.69 F obtained3078401200004 from optical model calculations for spherical nuclei. 3078401200005 Also compared with 7.03 F, which was calculated based 3078401200006 on averaging the potential scattering radii for 3078401200007 selenium isotopes and which was obtained by Koester 3078401200008 et al. from vibrational-rotational optical model 3078401200009 calculations of Jain,A.P.: Nucl. Phys.50 (1964) 157. 3078401200010 The comparison showed that the given data favours more 3078401200011 that calculated based on vibrational rotational 3078401200012 optical model than that calculated using spherical 3078401200013 optical model parameters. 3078401200014 STATUS (DEP,30784002) 3078401200015 ENDBIB 13 0 3078401200016 COMMON 2 3 3078401200017 EN-MIN EN-MAX 3078401200018 EV EV 3078401200019 0.03 0.60 3078401200020 ENDCOMMON 3 0 3078401200021 DATA 2 1 3078401200022 DATA DATA-ERR 3078401200023 FERMI FERMI 3078401200024 6.88 0.16 3078401200025 ENDDATA 3 0 3078401200026 ENDSUBENT 25 0 3078401299999 ENDENTRY 12 0 3078499999999