ENTRY 32828 20230921 3282800000001 SUBENT 32828001 20230921 20240316 3282800100001 BIB 16 36 3282800100002 TITLE The thermal neutron absorption cross section of 3282800100003 natural boron measured by transmission method 3282800100004 AUTHOR (Yuan Hanrong,Zhou Juying) 3282800100005 INSTITUTE (3CPRAEP) 3282800100006 REFERENCE (J,CST,6,127,1964) 3282800100007 FACILITY (REAC,3CPRAEP) Heavy-water reactor 3282800100008 INC-SOURCE (REAC) Monoenergetic neutron (0.0253eV) beam were 3282800100009 obtained by using NaCl crystals. 3282800100010 DETECTOR (BF3) Neutron detection system consists of CHM-8 BF3 3282800100011 counter with enriched 90% 10B. 3282800100012 METHOD (TRN) 3282800100013 ASSUMED (ASSUM1,5-B-0(N,EL)5-B-0,,SIG) 3282800100014 (ASSUM2,8-O-16(N,TOT),,SIG) 3282800100015 ANALYSIS Measured total cross section minus B scattering cross 3282800100016 section minus O total cross section 3282800100017 REL-REF (R,,D.J.Hughes+,P,BNL-325,1958) 3282800100018 B scattering cross section and O total cross section 3282800100019 SAMPLE Two B2O3 samples, the thickness were 1.469E20 and 3282800100020 1.082E20 n/cm2 (B2O3 content). Mixed D2O and NaOD 3282800100021 solution as the foil. 3282800100022 CORRECTION Corrected for 3282800100023 - correction of the secondary neutron effect 3282800100024 - correction of the dead time of the detector 3282800100025 - correction of the density of D2O in sample 3282800100026 - correction of water content of B2O3 3282800100027 ERR-ANALYS (ERR-T) The total uncertainty 3282800100028 (ERR-1) Correction of the density of D2O in sample 3282800100029 (ERR-2) Correction of water content of B2O3 3282800100030 (ERR-3) Correction of the secondary neutron effect 3282800100031 (ERR-4) Correction of the dead time of the detector 3282800100032 (ERR-5) Resolution of neutron crystal spectrometer 3282800100033 (ERR-6) Energy calibration 3282800100034 (ERR-7) Scattering cross section of B and O 3282800100035 (ERR-8) Others 3282800100036 STATUS (TABLE) Table 1 of At.En.Sci.Technol,6,127,1964. 3282800100037 HISTORY (20230921C) Su Yang (CNDC) 3282800100038 ENDBIB 36 0 3282800100039 COMMON 10 6 3282800100040 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 3282800100041 ERR-7 ERR-8 ASSUM1 ASSUM2 3282800100042 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3282800100043 PER-CENT PER-CENT B B 3282800100044 0.20 0.10 0.10 0.10 0.10 0.103282800100045 0.10 0.40 4.4 4.24 3282800100046 ENDCOMMON 6 0 3282800100047 ENDSUBENT 46 0 3282800199999 SUBENT 32828002 20230921 20240316 3282800200001 BIB 4 6 3282800200002 REACTION (5-B-0(N,ABS),,SIG,,,DERIV) 3282800200003 SAMPLE 1.469E20 n/cm2 (B2O3 content) 3282800200004 STATUS (COREL,32823003) 3282800200005 Data measured with 1.082E+20 atoms/cm2 sample 3282800200006 ERR-ANALYS (ERR-9) Boron content and count statistics for 3282800200007 sample 1 3282800200008 ENDBIB 6 0 3282800200009 COMMON 1 3 3282800200010 ERR-9 3282800200011 PER-CENT 3282800200012 0.62 3282800200013 ENDCOMMON 3 0 3282800200014 DATA 3 1 3282800200015 EN DATA ERR-T 3282800200016 EV B B 3282800200017 0.0253 764.5 6.1 3282800200018 ENDDATA 3 0 3282800200019 ENDSUBENT 18 0 3282800299999 SUBENT 32828003 20230921 20240316 3282800300001 BIB 4 6 3282800300002 REACTION (5-B-0(N,ABS),,SIG,,,DERIV) 3282800300003 SAMPLE 1.082E20 n/cm2 (B2O3 content) 3282800300004 STATUS (COREL,32823002) 3282800300005 Data measured with 1.469E+20 atoms/cm2 sample 3282800300006 ERR-ANALYS (ERR-9) Boron content and count statistics for 3282800300007 sample 2 3282800300008 ENDBIB 6 0 3282800300009 COMMON 1 3 3282800300010 ERR-9 3282800300011 PER-CENT 3282800300012 0.79 3282800300013 ENDCOMMON 3 0 3282800300014 DATA 3 1 3282800300015 EN DATA ERR-T 3282800300016 EV B B 3282800300017 0.0253 764.3 7.2 3282800300018 ENDDATA 3 0 3282800300019 ENDSUBENT 18 0 3282800399999 SUBENT 32828004 20230921 20240316 3282800400001 BIB 3 5 3282800400002 REACTION (5-B-0(N,ABS),,SIG,,AV,DERIV) 3282800400003 ANALYSIS Weighted mean of the cross sections measured with two 3282800400004 samples 3282800400005 STATUS (DEP,32828002) Weighted mean of 32828002 and 32828003 3282800400006 (DEP,32828003) Weighted mean of 32828002 and 32828003 3282800400007 ENDBIB 5 0 3282800400008 NOCOMMON 0 0 3282800400009 DATA 3 1 3282800400010 EN DATA ERR-T 3282800400011 EV B B 3282800400012 0.0253 764.4 4.7 3282800400013 ENDDATA 3 0 3282800400014 ENDSUBENT 13 0 3282800499999 ENDENTRY 4 0 3282899999999