ENTRY 20433 20200801 22902043300000001 SUBENT 20433001 20200801 22902043300100001 BIB 10 34 2043300100002 TITLE Measurements of thermal neutron cross-sections for 2043300100003 helium production in Ni-59 and Ni-60 2043300100004 REFERENCE (J,AKE,27,112,1976) Final publication 2043300100005 (C,75WASH,,810,1975) Table and graph. 2043300100006 (P,KDK-12,14,1976) Progress rept. 2043300100007 AUTHOR (J.McDonald, N.G.Sjoestrand) 2043300100008 INSTITUTE (2SWDCTH) 2043300100009 FACILITY (REAC,2SWDCTH) 2043300100010 INC-SOURCE Double crystal monochromator 2043300100011 At 50 MW reactor power about 105 n/s passed through the2043300100012 target position. 2043300100013 SAMPLE 0.85+-0.01 atomic % Ni-59 material obtained by 2043300100014 irradiating nickel powder enriched to 99.9% 2043300100015 in Ni-58 with thermal neutrons from the reactor R2. 2043300100016 .Target enriched to 93% in Ni-61 also prepared. 2043300100017 .Thickness 1.65+-0.05 mu-g/mm**2 for Ni-58,59 2043300100018 and 0.82+-0.03 mu-g/mm**2 for Ni-61. 2043300100019 The targets of LiF were vacuum deposited onto 12 mm 2043300100020 thick Al taken from the same sheet as was used for the 2043300100021 backing for the Ni targets. The LiF targets were 14 mm 2043300100022 in diam. and their thicknesses were determined by 2043300100023 micro-weighting to be 1.60, 2.10 and 3.37 mu-g/mm2 2043300100024 DETECTOR (SIBAR) Silicon surface barrier detector with an 2043300100025 active area of 114 mm2 was used for detecting alphas, 2043300100026 tritons and protons. 2043300100027 STATUS (TABLE) Data from text and tables in AKE,27,2,112. 2043300100028 HISTORY (19750711C) 2043300100029 (19750925E) 2043300100030 (19801125A) MONITOR and ERR-ANALYS changed. 2043300100031 (19801204E) 2043300100032 (20120808A) SD: Updated to new date formats,lower case.2043300100033 Corrected according last EXFOR rules and Dict. 2043300100034 (20200801U) SD: Refs BAP,20, and 75GOTHEN deleted (no 2043300100035 useful info, full info presented in 75WASH,,810,1975) 2043300100036 ENDBIB 34 0 2043300100037 NOCOMMON 0 0 2043300100038 ENDSUBENT 37 0 2043300199999 SUBENT 20433002 20120808 22322043300200001 BIB 6 9 2043300200002 REACTION (28-NI-59(N,P)27-CO-59,,SIG) Cross section. 2043300200003 MONITOR (3-LI-0(N,T),,SIG) Value taken as 70.7 b. 2043300200004 The Ni-59(n,alpha) cross section was derived assuming 2043300200005 a 1/v law for this cross section. 2043300200006 MONIT-REF (,S.F.Mughabghab+,R,BNL-325,(1),1973) Third edition 2043300200007 STATUS (TABLE) .Table in AKE,27,115. 2043300200008 ERR-ANALYS (DATA-ERR) Total estimated error given. 2043300200009 HISTORY (19801125A) REACTION re-coded. 2043300200010 (19801204E) 2043300200011 ENDBIB 9 0 2043300200012 NOCOMMON 0 0 2043300200013 DATA 5 1 2043300200014 EN DATA DATA-ERR MONIT MONIT-ERR 2043300200015 EV B B B B 2043300200016 2.5300E-02 4. 1. 70.7 0.7 2043300200017 ENDDATA 3 0 2043300200018 ENDSUBENT 17 0 2043300299999 SUBENT 20433003 20120808 22322043300300001 BIB 6 18 2043300300002 REACTION (28-NI-59(N,A)26-FE-56,,SIG) Cross section. 2043300300003 MONITOR (3-LI-0(N,T),,SIG) Value taken as 70.7 b. 2043300300004 Cross section derived assuming a 1/v law. 2043300300005 MONIT-REF (,S.F.Mughabghab+,R,BNL-325,(1),1973) Third edition 2043300300006 STATUS (TABLE) .Text, page 114 of AKE,27. 2043300300007 (DEP,20433004) 2043300300008 ERR-ANALYS (ERR-T) Total error includes: 2043300300009 (ERR-S) Uncertainty from the cross section ratio 2043300300010 measurements; 2043300300011 (ERR-1) Uncertainties in the thicknesses of the 2043300300012 Ni target; 2043300300013 (ERR-2) Uncertainties in the thicknesses of the 2043300300014 LiF target; 2043300300015 (ERR-3) Uncertainty in the amount of Ni-59 in the 2043300300016 enriched target; 2043300300017 (MONIT-ERR) Uncertainty in monitor reaction 2043300300018 HISTORY (19801125A) REACTION and MONITOR re-coded. 2043300300019 (19801204E) 2043300300020 ENDBIB 18 0 2043300300021 COMMON 4 3 2043300300022 ERR-S ERR-1 ERR-2 ERR-3 2043300300023 PER-CENT PER-CENT PER-CENT PER-CENT 2043300300024 2. 3. 6. 2. 2043300300025 ENDCOMMON 3 0 2043300300026 DATA 5 1 2043300300027 EN DATA ERR-T MONIT MONIT-ERR 2043300300028 EV B B B B 2043300300029 2.5300E-02 22.3 1.6 70.7 0.7 2043300300030 ENDDATA 3 0 2043300300031 ENDSUBENT 30 0 2043300399999 SUBENT 20433004 20120808 22322043300400001 BIB 4 10 2043300400002 REACTION ((28-NI-59(N,A)26-FE-56,,SIG)/ 2043300400003 (3-LI-0(N,T),,SIG)) Ratio of cross sections. 2043300400004 ERR-ANALYS (ERR-S) Statistical error on ratios. 2043300400005 Uncertainties in the target thicknesses or isotopic 2043300400006 composition are not included, since these would affect 2043300400007 the cross section ratios for each neutron 2043300400008 energy equally.2043300400009 STATUS (TABLE) .Table 1, page 114 of AKE,27. 2043300400010 HISTORY (19801125A) REACTION and MONITOR changed. 2043300400011 (19801204E) 2043300400012 ENDBIB 10 0 2043300400013 NOCOMMON 0 0 2043300400014 DATA 3 3 2043300400015 EN DATA ERR-S 2043300400016 EV NO-DIM NO-DIM 2043300400017 2.9000E-02 3.1600E-01 8.0000E-03 2043300400018 3.4500E-02 3.1500E-01 6.0000E-03 2043300400019 4.2100E-02 3.1600E-01 1.0000E-02 2043300400020 ENDDATA 5 0 2043300400021 ENDSUBENT 20 0 2043300499999 SUBENT 20433005 20120808 22322043300500001 BIB 6 9 2043300500002 REACTION (28-NI-61(N,A)26-FE-58,,SIG) Cross section. 2043300500003 MONITOR (3-LI-0(N,T),,SIG) Value taken as 70.7 b. 2043300500004 1/v law assumed for monitor cross section. 2043300500005 MONIT-REF (,S.F.Mughabghab+,R,BNL-325,(1),1973) Third edition 2043300500006 ERR-ANALYS .X-sect.Value is less than 2 millib. 2043300500007 STATUS (TABLE) .Text, page 114 of AKE,27. 2043300500008 HISTORY (19801125A) REACTION re-coded. 2043300500009 (19801204E) 2043300500010 (20120808A) SD: Data units were changed (b => mb) 2043300500011 ENDBIB 9 0 2043300500012 NOCOMMON 0 0 2043300500013 DATA 4 1 2043300500014 EN DATA-MAX MONIT MONIT-ERR 2043300500015 EV MB B B 2043300500016 2.5300E-02 2. 70.7 0.7 2043300500017 ENDDATA 3 0 2043300500018 ENDSUBENT 17 0 2043300599999 ENDENTRY 5 0 2043399999999