ENTRY 14248 20220122 14861424800000001 SUBENT 14248001 20220122 14861424800100001 BIB 15 43 1424800100002 TITLE Neutron capture cross sections of 184W and 186W 1424800100003 AUTHOR (J.Marganiec,I.Dillmann,C.Domingo Pardo,F.Kappeler) 1424800100004 REFERENCE (J,PR/C,80,025804,2009) Original reference. 1424800100005 #doi:10.1103/PhysRevC.80.025804 1424800100006 (R,INDC(GER)-0053,2021) Revised values of Karlsruhe 1424800100007 cross sections. 1424800100008 INSTITUTE (2GERKFK,2GERMUN,2GERGSI,3POLLOU) 1424800100009 FACILITY (VDG,2GERKFK)Measurements were carried out at the 1424800100010 Karlsruhe 3.7-MV Van de Graaff accelerator using the 1424800100011 activation technique 1424800100012 SAMPLE The W samples have been cut from metal foil of natural 1424800100013 composition and high chemical purity. Three 1424800100014 samples with different diameter and thickness 1424800100015 were used : 1424800100016 Sample Diameter(mm) Thickness(mm) Mass(mg) 1424800100017 1 10 0.05 81.41 1424800100018 2 6 0.16 90.23 1424800100019 3 6 0.11 59.02 1424800100020 DETECTOR (HPGE) The gamma activities were counted by means of 1424800100021 two high-purity HPGe detector systems, a single 1424800100022 detector with about 30% relative efficiency and a 1424800100023 setup of two Ge clover detectors each with a 1424800100024 relative efficiency of 130% in very close geometry. 1424800100025 METHOD (ACTIV) 1424800100026 MONITOR (79-AU-197(N,G)79-AU-198,,SIG,,SPA) 1424800100027 DECAY-MON (79-AU-198-G,2.69517D,DG,411.8,0.9558) 1424800100028 MONIT-REF (,R.Reifarth+,J,EPJ/P,133,424,2018) Complete 1424800100029 description of Karlsruhe cross sections deficiencies. 1424800100030 INC-SOURCE (P-LI7) 1424800100031 ERR-ANALYS (ERR-T) Total uncertainty 1424800100032 (ERR-1) Uncertainty in detection efficiency 1424800100033 (MONIT-ERR) Uncertainty in monitor cross-section 1424800100034 COMMENT Compiler's comment: The Karlsruhe group original 1424800100035 result was based on its own 197Au(n,gamma) cross 1424800100036 section by Ratynski and Kaeppeler, Phys.Rev. C37, 595 1424800100037 (1988), EXFOR entry #22099 for neutron beam monitor 1424800100038 that later was proven as deficient. 1424800100039 HISTORY (20090826C) Compiled by S.H. 1424800100040 (20210611A) BP: Added doi, COMMENT, updated REFERENCE, 1424800100041 replaced MONIT-ERR, original cross sections1424800100042 in Sub. 2-3 with the revised values, 1424800100043 included Sub. 4-5 suggested by Kaeppeler 1424800100044 and Reifarth. 1424800100045 ENDBIB 43 0 1424800100046 COMMON 5 3 1424800100047 KT-NRM KT-ERR MONIT-ERR ERR-1 MONIT 1424800100048 KEV KEV MB PER-CENT B 1424800100049 25.0 0.5 1. 2.0 622.7 1424800100050 ENDCOMMON 3 0 1424800100051 ENDSUBENT 50 0 1424800199999 SUBENT 14248002 20220122 14861424800200001 BIB 8 16 1424800200002 REACTION (74-W-184(N,G)74-W-185,,SIG,,SPA) 1424800200003 DECAY-DATA (74-W-185-G,75.3D,DG,125.358,0.000192) 1424800200004 METHOD Revised data: Measured quantity: cross section ratio 1424800200005 184W/197Au = 0.384+-0.019 1424800200006 ERR-ANALYS (ERR-S,0.2,0.7) Statistical uncertainty 1424800200007 (ERR-2) Uncertainty in gamma ray intensity 1424800200008 (ERR-3,1.1,2.5) Uncertainty in gamma ray selfabsorption1424800200009 (ERR-4) Uncertainty in half-life 1424800200010 CORRECTION Correction for revised gold standard 622.7/586 = 1.06261424800200011 COMMENT Cross section value in subentry 14248.002 is 1424800200012 renormalized for new gold cross section. 1424800200013 STATUS (TABLE) Revised cross sections: Text on page 21 of 1424800200014 R,INDC(GER)-0053,2021. 1424800200015 HISTORY (20210611A) BP: Replaced original Karlsruhe cross 1424800200016 sections with the revised values, added 1424800200017 CORRECTION and COMMENT information. 1424800200018 ENDBIB 16 0 1424800200019 NOCOMMON 0 0 1424800200020 DATA 5 1 1424800200021 KT-DUMMY DATA ERR-T ERR-2 ERR-4 1424800200022 KEV MB MB PER-CENT PER-CENT 1424800200023 25.0 239.0 12.1 3.0 0.4 1424800200024 ENDDATA 3 0 1424800200025 ENDSUBENT 24 0 1424800299999 SUBENT 14248003 20220122 14861424800300001 BIB 8 23 1424800300002 REACTION (74-W-186(N,G)74-W-187,,SIG,,SPA) 1424800300003 DECAY-DATA (74-W-187,23.72HR,DG,685.73,0.332, 1424800300004 DG,772.89,0.0502) 1424800300005 METHOD Revised data: Measured quantity: cross section ratio 1424800300006 184W/197Au = 0.384+-0.019 1424800300007 ERR-ANALYS (ERR-S,0.2,0.6) Statistical uncertainty 1424800300008 (ERR-2) Uncertainty in gamma ray intensity 1424800300009 (ERR-3,0.4,0.6) Uncertainty in irradiation history 1424800300010 (ERR-4) Uncertainty in half-life 1424800300011 CORRECTION Correction for revised gold standard 622.7/586 = 1.06261424800300012 COMMENT Cross section value in subentry 14248.003 is 1424800300013 renormalized 1424800300014 a) for new gold cross section 1424800300015 b) by an additional factor 33.2/27.3 = 0.8223, which 1424800300016 accounts for the revised gamma-intensities for the 1424800300017 685.72 and 772.89 keV transitions in the 187W-decay 1424800300018 (NDS/ENSDF 2020) 1424800300019 STATUS (TABLE) Revised cross sections: Text on page 22 of 1424800300020 R,INDC(GER)-0053,2021. 1424800300021 HISTORY (20210611A) BP: Replaced original Karlsruhe cross 1424800300022 sections with the revised values, added 1424800300023 CORRECTION and COMMENT information, updated 1424800300024 ERR-2. 1424800300025 ENDBIB 23 0 1424800300026 NOCOMMON 0 0 1424800300027 DATA 5 1 1424800300028 KT-DUMMY DATA ERR-T ERR-2 ERR-4 1424800300029 KEV MB MB PER-CENT PER-CENT 1424800300030 25.0 199.0 5.8 1.5 0.25 1424800300031 ENDDATA 3 0 1424800300032 ENDSUBENT 31 0 1424800399999 SUBENT 14248004 20210612 14861424800400001 BIB 5 15 1424800400002 REACTION (74-W-184(N,G)74-W-185,,SIG,,MXW,DERIV) 1424800400003 ANALYSIS MACS are derived from ENDF/B-VII.0 renormalized to 1424800400004 the measured SACS. The final MACS values were 1424800400005 obtained from thermalized energy-differential cross 1424800400006 sections kT =(2/sqrt(pi)) *(Integral from zero 1424800400007 to infinity[sigma(En)NF](En*exp(-En/kT)dE)) /(Integral 1424800400008 from zero to infinity[En*exp(-En/kT)dEn]) where En is 1424800400009 the neutron energy and exp(-En/kT) the Boltzmann factor1424800400010 for a thermal energy kT. 1424800400011 COMMENT Cross section value in subentry 14248.004 is 1424800400012 renormalized for new gold cross section. 1424800400013 STATUS (DEP,14248002) 1424800400014 (TABLE) Revised cross sections: Text on page 23 of 1424800400015 R,INDC(GER)-0053,2021. 1424800400016 HISTORY (20210611C) BP 1424800400017 ENDBIB 15 0 1424800400018 NOCOMMON 0 0 1424800400019 DATA 3 11 1424800400020 KT DATA ERR-T 1424800400021 KEV MB MB 1424800400022 5.0 728.0 233.0 1424800400023 10.0 434.0 98.0 1424800400024 15.0 336.0 50.0 1424800400025 20.0 287.0 27.0 1424800400026 25.0 257.0 14.0 1424800400027 30.0 236.0 16.0 1424800400028 40.0 205.0 20.0 1424800400029 50.0 183.0 26.0 1424800400030 60.0 165.0 29.0 1424800400031 80.0 139.0 33.0 1424800400032 100.0 121.0 36.0 1424800400033 ENDDATA 13 0 1424800400034 ENDSUBENT 33 0 1424800499999 SUBENT 14248005 20210612 14861424800500001 BIB 6 21 1424800500002 REACTION (74-W-186(N,G)74-W-187,,SIG,,MXW,DERIV) 1424800500003 ANALYSIS MACS are derived from ENDF/B-VII.0 renormalized to 1424800500004 the measured SACS. The final MACS values were 1424800500005 obtained from thermalized energy-differential cross 1424800500006 sections kT =(2/sqrt(pi)) *(Integral from zero 1424800500007 to infinity[sigma(En)NF](En*exp(-En/kT)dE)) /(Integral 1424800500008 from zero to infinity[En*exp(-En/kT)dEn]) where En is 1424800500009 the neutron energy and exp(-En/kT) the Boltzmann factor1424800500010 for a thermal energy kT. 1424800500011 ERR-ANALYS (ERR-2) Uncertainty in gamma ray intensity 1424800500012 COMMENT Cross section value in subentry 14248.005 is 1424800500013 renormalized 1424800500014 a) for new gold cross section 1424800500015 b) by an additional factor 33.2/27.3 = 0.8223, which 1424800500016 accounts for the revised gamma-intensities for the 1424800500017 685.72 and 772.89 keV transitions in the 187W-decay 1424800500018 (NDS/ENSDF 2020). 1424800500019 STATUS (DEP,14248003) 1424800500020 (TABLE) Revised cross sections: Text on page 24 of 1424800500021 R,INDC(GER)-0053,2021. 1424800500022 HISTORY (20210611C) BP 1424800500023 ENDBIB 21 0 1424800500024 COMMON 1 3 1424800500025 ERR-2 1424800500026 PER-CENT 1424800500027 2.0 1424800500028 ENDCOMMON 3 0 1424800500029 DATA 3 11 1424800500030 KT DATA ERR-T 1424800500031 EV MB MB 1424800500032 5.0 523.0 147.0 1424800500033 10.0 327.0 56.0 1424800500034 15.0 263.0 25.0 1424800500035 20.0 232.0 15.0 1424800500036 25.0 214.0 10.0 1424800500037 30.0 204.0 10.0 1424800500038 40.0 179.0 10.0 1424800500039 50.0 172.0 11.0 1424800500040 60.0 160.0 12.0 1424800500041 80.0 141.0 15.0 1424800500042 100.0 126.0 17.0 1424800500043 ENDDATA 13 0 1424800500044 ENDSUBENT 43 0 1424800599999 ENDENTRY 5 0 1424899999999