ENTRY 30858 20250522 3085800000001 SUBENT 30858001 20250522 20260228 3085800100001 BIB 11 30 3085800100002 TITLE Measurement of neutron capture cross sections for the 3085800100003 174Yb(n,g)175Yb reaction at thermal and epithermal 3085800100004 energies 3085800100005 AUTHOR (T.H.Nguyen, V.D.Nguyen, G.N.Kim, H.Naik, D.K.Pham) 3085800100006 INSTITUTE (3KORKNU,3VN IPH,3INDTRM) 3085800100007 REFERENCE (J,RPC,205,110738,2023) 3085800100008 FACILITY (LINAC,3KORPUE) Pohang Neutron Facility 3085800100009 INC-SOURCE (PHOTO) Ta(g,n) photonuclear reaction 3085800100010 SAMPLE (70-YB-174,NAT=0.3183) 3085800100011 Natural Yb 3085800100012 - Purity: 99.0% 3085800100013 - Thickness: 0.125 mm 3085800100014 - Size: 15 mm x 15 mm 3085800100015 Natural Au foil for the reference reaction 3085800100016 - Purity: 99.95% 3085800100017 - Thickness: 0.03 mm 3085800100018 - Size: 15 mm x 15 mm 3085800100019 Natural In for the neutron flux monitoring 3085800100020 - Purity: 99.95% 3085800100021 - Thickness: 0.05 mm 3085800100022 - Size: 15 mm x 15 mm 3085800100023 The Yb, Au and In foils were irradiated with and 3085800100024 without a Cd cover of 0.5 mm thickness. 3085800100025 METHOD (ACTIV,GSPEC) 3085800100026 DETECTOR (HPGE) Detection efficiency of 20% relative to 7.62 cm 3085800100027 x 7.62 cm NaI(Tl) detector and energy resolution of 3085800100028 1.8 keV FWHM at 1332.5 keV peak of 60Co 3085800100029 STATUS (TABLE,,T.H.Nguyen,J,RPC,205,110738,2023) Table 3 3085800100030 (APRVD) Approved by G.N.Kim (2025-06-19) 3085800100031 HISTORY (20250522C) S.C.Yang 3085800100032 ENDBIB 30 0 3085800100033 NOCOMMON 0 0 3085800100034 ENDSUBENT 33 0 3085800199999 SUBENT 30858002 20250522 20260228 3085800200001 BIB 6 12 3085800200002 REACTION (70-YB-174(N,G)70-YB-175,,SIG) 3085800200003 DECAY-DATA (70-YB-175,4.185D,DG,282.52,0.0613) 3085800200004 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 3085800200005 DECAY-MON (79-AU-198-G,2.6941D,DG,411.80,0.9562) 3085800200006 MONIT-REF (,S.F.Mughabghab,R,INDC(NDS)-440,2003) 3085800200007 ERR-ANALYS (ERR-T) Total uncertainty: 6.0% 3085800200008 (ERR-1) Detection efficiency (2.8%)3085800200009 (ERR-2) Counting statistics (1.8%)3085800200010 (ERR-3) Thermal neutron self-shielding factor (3.5%)3085800200011 (ERR-4) Attenuation effect (1.7%)3085800200012 (ERR-5) Summing effect (1.6%)3085800200013 (ERR-6) Others (0.8%)3085800200014 ENDBIB 12 0 3085800200015 COMMON 6 3 3085800200016 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 3085800200017 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3085800200018 2.8 1.8 3.5 1.7 1.6 0.8 3085800200019 ENDCOMMON 3 0 3085800200020 DATA 5 1 3085800200021 EN DATA ERR-T MONIT MONIT-ERR 3085800200022 EV B B B B 3085800200023 0.0253 70.5 4.2 98.65 0.09 3085800200024 ENDDATA 3 0 3085800200025 ENDSUBENT 24 0 3085800299999 SUBENT 30858003 20250522 20260228 3085800300001 BIB 8 17 3085800300002 REACTION (70-YB-174(N,G)70-YB-175,,RI) 3085800300003 DECAY-DATA (70-YB-175,4.185D,DG,282.52,0.0613) 3085800300004 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 3085800300005 ANALYSIS The alpha-shape factor was experimentally obtained as 3085800300006 0.067+/-0.003 by using the dual monitoring method. 3085800300007 ASSUMED (ASSUM1,79-AU-197(N,G)79-AU-198,,SIG) 3085800300008 (ASSUM2,79-AU-197(N,G)79-AU-198,,RI) 3085800300009 (ASSUM3,70-YB-174(N,G)70-YB-175,,SIG) 3085800300010 DECAY-MON (79-AU-198-G,2.6941D,DG,411.80,0.9562) 3085800300011 REL-REF (R,,S.F.Mughabghab,R,INDC(NDS)-440,2003) 3085800300012 Au thermal cross section and resonance integral given 3085800300013 ERR-ANALYS (ERR-T) Total uncertainty: 7.7% 3085800300014 (ERR-1) Epithermal neutron self-shielding (3.2%)3085800300015 (ERR-2) Alpha-shape factor (3.3%)3085800300016 (ERR-3) Detector efficiency (2.8%)3085800300017 (ERR-4) Cadmium ratio (2.4%)3085800300018 (ERR-5) Others (0.8%)3085800300019 ENDBIB 17 0 3085800300020 COMMON 5 3 3085800300021 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 3085800300022 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3085800300023 3.2 3.3 2.8 2.4 0.8 3085800300024 ENDCOMMON 3 0 3085800300025 DATA 9 1 3085800300026 EN-MIN DATA ERR-T ASSUM1 ASSUM1-ERR ASSUM2 3085800300027 ASSUM2-ERR ASSUM3 ASSUM3-ERR 3085800300028 EV KB KB B B B 3085800300029 B B B 3085800300030 0.55 54.1 4.2 98.65 0.09 1550. 3085800300031 28. 70.5 4.2 3085800300032 ENDDATA 6 0 3085800300033 ENDSUBENT 32 0 3085800399999 ENDENTRY 3 0 3085899999999