ENTRY 23736 20210331 23022373600000001 SUBENT 23736001 20210331 23022373600100001 BIB 11 57 2373600100002 TITLE Absolute and relative cross section measurements of 2373600100003 237Np(n,f) and 238U(n,f) at the National Physical 2373600100004 Laboratory 2373600100005 AUTHOR (P.Salvador-Castineira, F.-J.Hambsch, A.Goeoek, 2373600100006 M.Vidali, N.P.Hawkes, N.J.Roberts, G.C.Taylor, 2373600100007 D.J.Thomas) 2373600100008 INSTITUTE (2UK NPL,2ZZZGEL) 2373600100009 REFERENCE (J,EPJ/CS,146,04050,2017) 2373600100010 (W,SALVADOR-CASTINEIRA,20161117) 2373600100011 Memo summarizing the measurement incl. data tables 2373600100012 EXP-YEAR (2016) January 2016 2373600100013 FACILITY (VDG,2UK NPL) 3.5 MV VdG accelerator 2373600100014 INC-SOURCE (P-LI7) En=0.567 MeV 2373600100015 (P-T) En=1.2, 1.8, 2.0 and 2.4 MeV 2373600100016 DETECTOR (FISCH) Twin Frish-grid ionization chamber (TFGIC) 2373600100017 (LONGC) Neutron fluence measurement 2373600100018 CORRECTION Corrected for 2373600100019 - neutron scattered in target can, 2373600100020 - fissions induced by low-energy neutrons, 2373600100021 - point-to-point to disk-to-disk geometry transfer 2373600100022 for absolute fluence determination, 2373600100023 - neutron attenuation in ionization chamber, 2373600100024 - fission fragments below electronic threshold, 2373600100025 - fission fragments loss within sample deposit 2373600100026 ERR-ANALYS The uncertainty associated with the neutron fluence 2373600100027 measured by the long counter (LC) is mainly from the 2373600100028 following 7 sources: 2373600100029 #1 LC statistics and dead-time 2373600100030 #2 Correction for inexact shadowing 2373600100031 #3 LC to target distance 2373600100032 #4 Air out-scatter 2373600100033 #5 Efficiency and effective centre 2373600100034 #6 Fluence variation during irradiation 2373600100035 #7 TFGIC to target distance 2373600100036 ------------------------------------ 2373600100037 Neutron energy (MeV) 2373600100038 0.567 1.2 1.8 2.0 2.4 2373600100039 ------------------------------------ 2373600100040 #1 0.67% 0.23% 0.36% 0.36% 0.41% 2373600100041 #2 0.15% 0.29% 0.23% 0.23% 0.21% 2373600100042 #3 0.20% 0.20% 0.20% 0.20% 0.20% 2373600100043 #4 0.21% 0.17% 0.22% 0.15% 0.12% 2373600100044 #5 2.0% 2.0% 2.0% 2.0% 2.0% 2373600100045 #6 1.0% 1.0% 1.0% 1.0% 1.0% 2373600100046 #7 4.57% 2.26% 2.26% 2.26% 2.24% 2373600100047 ------------------------------------ 2373600100048 (ERR-T) Total uncertainty 2373600100049 (ERR-S) statistics 2373600100050 (ERR-1) neutron fluence 2373600100051 (ERR-2) fission induced by low-energy neutrons 2373600100052 (ERR-3) point-to-point to disk-to-disk transfer 2373600100053 (ERR-4) neutron scattered in target can 2373600100054 (ERR-5) neutron attenuation in ionization chamber 2373600100055 (ERR-6) mass 2373600100056 (ERR-7) electronic threshold 2373600100057 (ERR-8) fission-fragment loss within sample 2373600100058 HISTORY (20210331C) On 2373600100059 ENDBIB 57 0 2373600100060 NOCOMMON 0 0 2373600100061 ENDSUBENT 60 0 2373600199999 SUBENT 23736002 20210331 23022373600200001 BIB 2 2 2373600200002 REACTION (92-U-238(N,F),,SIG) 2373600200003 STATUS (TABLE) Table 1 of the memo from P.Salvador-Castineira 2373600200004 ENDBIB 2 0 2373600200005 COMMON 3 3 2373600200006 ERR-6 ERR-7 ERR-8 2373600200007 PER-CENT PER-CENT PER-CENT 2373600200008 2.6 0.5 1.0 2373600200009 ENDCOMMON 3 0 2373600200010 DATA 10 6 2373600200011 EN EN-RSL-HW DATA ERR-T ERR-S ERR-1 2373600200012 ERR-2 ERR-3 ERR-4 ERR-5 2373600200013 MEV MEV B PER-CENT PER-CENT PER-CENT 2373600200014 PER-CENT PER-CENT PER-CENT PER-CENT 2373600200015 1.8 0.043 0.48 4.9 1.7 3.2 2373600200016 0.6 1.1 0.4 0.3 2373600200017 1.8 0.043 0.51 4.8 1.4 3.2 2373600200018 0.6 1.2 0.4 0.3 2373600200019 2.0 0.041 0.54 4.8 1.7 3.2 2373600200020 0.7 1.2 0.4 0.3 2373600200021 2.0 0.041 0.55 4.7 1.3 3.2 2373600200022 0.7 1.2 0.4 0.3 2373600200023 2.4 0.037 0.56 4.8 1.5 3.2 2373600200024 0.8 1.2 0.2 0.3 2373600200025 2.4 0.037 0.56 4.7 1.3 3.2 2373600200026 0.7 1.2 0.2 0.3 2373600200027 ENDDATA 16 0 2373600200028 ENDSUBENT 27 0 2373600299999 SUBENT 23736003 20210331 23022373600300001 BIB 2 2 2373600300002 REACTION (93-NP-237(N,F),,SIG) 2373600300003 STATUS (TABLE) Table 2 of the memo from P.Salvador-Castineira 2373600300004 ENDBIB 2 0 2373600300005 COMMON 3 3 2373600300006 ERR-6 ERR-7 ERR-8 2373600300007 PER-CENT PER-CENT PER-CENT 2373600300008 0.5 0.5 1.0 2373600300009 ENDCOMMON 3 0 2373600300010 DATA 10 7 2373600300011 EN EN-RSL-HW DATA ERR-T ERR-S ERR-1 2373600300012 ERR-2 ERR-3 ERR-4 ERR-5 2373600300013 MEV MEV B PER-CENT PER-CENT PER-CENT 2373600300014 PER-CENT PER-CENT PER-CENT PER-CENT 2373600300015 0.567 0.005 0.63 5.8 2.0 5.1 2373600300016 0.9 0.8 0.4 0.5 2373600300017 1.2 0.052 1.54 4.6 1.8 3.6 2373600300018 1.2 0.9 0.6 0.3 2373600300019 1.8 0.043 1.65 4.2 1.5 3.2 2373600300020 1.2 1.1 0.4 0.3 2373600300021 1.8 0.043 1.74 4.0 0.9 3.2 2373600300022 1.2 1.2 0.4 0.3 2373600300023 2.0 0.041 1.69 4.2 1.6 3.2 2373600300024 1.2 1.2 0.4 0.3 2373600300025 2.0 0.041 1.74 4.0 0.8 3.2 2373600300026 1.2 1.2 0.4 0.3 2373600300027 2.4 0.037 1.73 4.0 0.9 3.2 2373600300028 1.2 1.2 0.2 0.3 2373600300029 ENDDATA 18 0 2373600300030 ENDSUBENT 29 0 2373600399999 ENDENTRY 3 0 2373699999999