ENTRY 30972 20090915 31413097200000001 SUBENT 30972001 20090915 31413097200100001 BIB 14 65 3097200100002 REFERENCE (J,ANE,16,(12),623,1989) 3097200100003 (R,INDC(NDS)-232,17,199001) Similar, same data 3097200100004 AUTHOR (M.Wagner,G.Winkler,H.Vonach,Cs.M.Buczko,J.Csikai) 3097200100005 TITLE Measurement of the cross sections for the reactions 3097200100006 Cr-52(n,2n)Cr-51, Zn-66(n,2n)Zn-65, Y-89(n,2n)Y-88 3097200100007 and Zr-96(n,2n)Zr-95 from 13.5 to 14.8 MeV. 3097200100008 FACILITY (CCW,3HUNKOS) 3097200100009 INC-SOURCE (D-T) Neutrons were produced by bombarding a 0.5 mm 3097200100010 thick Al-backed Ti-T target with a 190 +- 10 keV 3097200100011 deuteron beam. Neutron energy was selected by the 3097200100012 angular position of the sample with respect to the 3097200100013 deuteron beam axis. The neutron-energy scale was 3097200100014 verified by measuring the ratios of the Zr-89 to 3097200100015 Nb-92-m specific activities induced in sandwiched Zr 3097200100016 and Nb foils at 12.5 and 97.5 degrees and comparing 3097200100017 them to expected ones based on existing cross section 3097200100018 data. 3097200100019 SAMPLE Yttrium-oxide powder samples and high-purity metallic 3097200100020 samples of natural Cr,Zn and Zr. 3097200100021 METHOD (ACTIV) For the yttrium-oxide samples, sandwiched 3097200100022 between two Nb foils, the mean of the fluences at both 3097200100023 monitor foils was taken. In all other cases the fluence3097200100024 at the sample position was calculated from the fluence 3097200100025 at the monitor foil position using a 1/r**2 dependence 3097200100026 and accounting for neutron absorption in the sample 3097200100027 and monitor foil. 3097200100028 MONITOR (41-NB-93(N,2N)41-NB-92-M,,SIG) Neutron fluence. 3097200100029 Nb foils with the same shape as the samples were placed3097200100030 back-to-back behind each sample. The yttrium-oxide 3097200100031 samples were sandwiched between two fluence monitor 3097200100032 foils. 3097200100033 MONIT-REF (,T.B.Ryves,J,ANE,16,307,1989) 3097200100034 (,T.B.Ryves,R,EUR-11912-EN,1989) 3097200100035 (,J.Csikai+,S,IAEA-410,296,1986) 3097200100036 DECAY-MON (41-NB-92-M,10.15D,DG,912.6,0.0178, 3097200100037 DG,934.44,0.9892, 3097200100038 DG,1847.54,.0088) 3097200100039 CORRECTION Activation enhancement due to elastic neutron scat- 3097200100040 tering in the sample and monitor foils and due to 3097200100041 inscattering by neighbouring material was estimated. 3097200100042 In all cases where applicable, the corrections for 3097200100043 this and for relating the measured cross sections to 3097200100044 the average neutron energy were negligible. 3097200100045 ERR-ANALYS (ERR-T) Nonnegligible uncertainties involve 3097200100046 uncertainties in: 3097200100047 * counting statistics, 3097200100048 * relative gamma counts-to-activity convers. factors,3097200100049 * mass and purity of samples, 3097200100050 * isotopic abundance, 3097200100051 * survival factor of Nb-92-m, 3097200100052 * detector efficiencies, 3097200100053 * average neutron energies, 3097200100054 * monitor reference cross section and 3097200100055 * irradiation geometry. 3097200100056 Total uncertainties in cross sections were obtained 3097200100057 by adding the uncertainty components (standard 3097200100058 deviations) in quadrature. 3097200100059 Detailed information on the size of all sources of 3097200100060 uncertainties is given in Tables 3 and 4 of the 3097200100061 reference. 3097200100062 STATUS (TABLE) Data are taken from Table 2 of Ann.Nucl.Energy,3097200100063 vol.16, No 12, pp. 623, 1989. 3097200100064 HISTORY (19920129C) HW 3097200100065 (19970924U) HW. -Reference added.- 3097200100066 (20090912A) SD:Updated to new date formats,lower case. 3097200100067 ENDBIB 65 0 3097200100068 NOCOMMON 0 0 3097200100069 ENDSUBENT 68 0 3097200199999 SUBENT 30972002 20090915 31413097200200001 BIB 4 5 3097200200002 INSTITUTE (3HUNKOS,2AUSIRK) 3097200200003 REACTION (30-ZN-66(N,2N)30-ZN-65,,SIG) 3097200200004 For results of analysis at IRK see subentry 30972006 3097200200005 DECAY-DATA (30-ZN-65,243.9D,DG,1115.55,.5065) 3097200200006 DETECTOR (GELI) 3097200200007 ENDBIB 5 0 3097200200008 NOCOMMON 0 0 3097200200009 DATA 5 4 3097200200010 EN EN-ERR EN-RSL-HW DATA ERR-T 3097200200011 MEV MEV MEV MB MB 3097200200012 14.754 .013 .190 738.1 16.8 3097200200013 14.283 .011 .080 663.4 15.4 3097200200014 13.922 .010 .030 589.8 16.1 3097200200015 13.466 .010 .115 495.5 11.2 3097200200016 ENDDATA 6 0 3097200200017 ENDSUBENT 16 0 3097200299999 SUBENT 30972003 20090915 31413097200300001 BIB 4 18 3097200300002 INSTITUTE (3HUNKOS,2AUSIRK) 3097200300003 REACTION (40-ZR-0(N,X)40-ZR-95,CUM,SIG) 3097200300004 For results of analysis at IRK see subentry 30972007 3097200300005 DECAY-DATA (40-ZR-95,64.02D,DG,235.69,.0029, 3097200300006 DG,724.20,.4415, 3097200300007 DG,756.73,.5450) 3097200300008 (39-Y-95,10.3MIN,B-) 3097200300009 When measuring the Zr-95 activity produced in the 3097200300010 nat. Zr(n,x) reaction, 3097200300011 one measures the sum of the following cross sections: 3097200300012 a) the Zr-96(n,2n) reaction, providing by far 3097200300013 the main contribution; 3097200300014 b) the Zr-96 (n,d)+(n,np)+(n,pn) Y-95 reaction, 3097200300015 since Y-95 decays to Zr-95 via beta- emission; 3097200300016 c) the Zr-94(n,g)Zr-95 reaction, weighted by a 3097200300017 factor 6.207, which is the ratio of the isotopic 3097200300018 abundances of Zr-94 to Zr-96 in natural Zr. 3097200300019 DETECTOR (GELI) 3097200300020 ENDBIB 18 0 3097200300021 NOCOMMON 0 0 3097200300022 DATA 5 4 3097200300023 EN EN-ERR EN-RSL-HW DATA ERR-T 3097200300024 MEV MEV MEV MB MB 3097200300025 14.771 .013 .185 1512.2 38.6 3097200300026 14.341 .011 .090 1480.0 37.7 3097200300027 13.981 .010 .030 1483.3 43.5 3097200300028 13.495 .010 .115 1436.6 39.4 3097200300029 ENDDATA 6 0 3097200300030 ENDSUBENT 29 0 3097200399999 SUBENT 30972004 20090915 31413097200400001 BIB 4 7 3097200400002 INSTITUTE (3HUNKOS,2AUSIRK) 3097200400003 For results of analysis at IRK see subentry 30972008 3097200400004 REACTION (39-Y-89(N,2N)39-Y-88,,SIG) 3097200400005 DECAY-DATA (39-Y-88,106.64D,DG,898.04,.924, 3097200400006 DG,1836.06,.9930, 3097200400007 DG,2734.09,.0072) 3097200400008 DETECTOR (GELI) 3097200400009 ENDBIB 7 0 3097200400010 NOCOMMON 0 0 3097200400011 DATA 5 4 3097200400012 EN EN-ERR EN-RSL-HW DATA ERR-T 3097200400013 MEV MEV MEV MB MB 3097200400014 14.789 .014 .210 1015.8 21.8 3097200400015 14.476 .012 .120 917.9 19.9 3097200400016 14.132 .010 .054 847.1 25.4 3097200400017 13.586 .010 .092 686.4 15.1 3097200400018 ENDDATA 6 0 3097200400019 ENDSUBENT 18 0 3097200499999 SUBENT 30972005 20090915 31413097200500001 BIB 4 9 3097200500002 INSTITUTE (2AUSIRK,3HUNKOS) 3097200500003 REACTION (24-CR-52(N,2N)24-CR-51,,SIG) 3097200500004 DECAY-DATA (24-CR-51,27.704D,DG,320.08,.0985) 3097200500005 DETECTOR (NAICR,GE-IN) With the intrinsic Germanium detector 3097200500006 the relative activities of the Cr-51 samples and their 3097200500007 monitor foils were determined. For normalization 3097200500008 purposes absolute measurements were performed on the 3097200500009 sample with the highest activity, employing a NaI(Ti) 3097200500010 well-type detector. 3097200500011 ENDBIB 9 0 3097200500012 NOCOMMON 0 0 3097200500013 DATA 5 4 3097200500014 EN EN-ERR EN-RSL-HW DATA ERR-T 3097200500015 MEV MEV MEV MB MB 3097200500016 14.783 .013 .210 400.6 6.8 3097200500017 14.397 .011 .105 339.3 6.2 3097200500018 14.040 .010 .035 270.5 4.8 3097200500019 13.528 .010 .095 172.9 3.6 3097200500020 ENDDATA 6 0 3097200500021 ENDSUBENT 20 0 3097200599999 SUBENT 30972006 20090915 31413097200600001 BIB 4 10 3097200600002 INSTITUTE (2AUSIRK,3HUNKOS) 3097200600003 REACTION (30-ZN-66(N,2N)30-ZN-65,,SIG) 3097200600004 For results of analysis at KFI see subentry 30972002 3097200600005 DECAY-DATA (30-ZN-65,243.9D,DG,1115.55,.5065) 3097200600006 DETECTOR (NAICR,GE-IN) With the intrinsic Germanium detector 3097200600007 the relative activities of the Zn-65 samples and their 3097200600008 monitor foils were determined. For normalization 3097200600009 purposes absolute measurements were performed on the 3097200600010 sample with the highest activity, employing a NaI(Ti) 3097200600011 well-type detector. 3097200600012 ENDBIB 10 0 3097200600013 NOCOMMON 0 0 3097200600014 DATA 5 4 3097200600015 EN EN-ERR EN-RSL-HW DATA ERR-T 3097200600016 MEV MEV MEV MB MB 3097200600017 14.754 .013 .190 734.5 11.8 3097200600018 14.283 .011 .080 652.0 11.9 3097200600019 13.922 .010 .030 590.6 10.3 3097200600020 13.466 .010 .115 503.9 9.5 3097200600021 ENDDATA 6 0 3097200600022 ENDSUBENT 21 0 3097200699999 SUBENT 30972007 20090915 31413097200700001 BIB 4 31 3097200700002 INSTITUTE (2AUSIRK,3HUNKOS) 3097200700003 REACTION (40-ZR-0(N,X)40-ZR-95,CUM,SIG) 3097200700004 For results of analysis at KFI see subentry 30972003 3097200700005 DECAY-DATA (40-ZR-95,64.02D,DG,235.69,.0029, 3097200700006 DG,724.20,.4415, 3097200700007 DG,756.73,.5450) 3097200700008 (39-Y-95,10.3MIN,B-) 3097200700009 (41-NB-95-G,34.97D,DG,765.81,.998) 3097200700010 With the NaI(Tl) both the Zr-95 and Nb-95 activities 3097200700011 were counted since a small fraction of the Zr-95 3097200700012 (1.11%) decays feed the 235.7 keV Nb-95-m state which 3097200700013 itself decays mainly to the groundstate of Nb-95. From 3097200700014 the irradiation time, production rate for Zr-95 and 3097200700015 both decay constants the specific Zr-95 activity at the3097200700016 end of the irradiation was evaluated. 3097200700017 When measuring the sum of the Zr-95 and Nb-95 activi- 3097200700018 ties produced in the nat. Zr(n,x) reaction, one measu- 3097200700019 res the sum of the following cross sections: 3097200700020 a) the Zr-96(n,2n) reaction, providing by far 3097200700021 the main contribution; 3097200700022 b) the Zr-96 (n,d)+(n,np)+(n,pn) Y-95 reaction, 3097200700023 since Y-95 decays to Zr-95 via beta- emission; 3097200700024 c) the Zr-94(n,g)Zr-95 reaction, weighted by a 3097200700025 factor 6.207, which is the ratio of the isotopic 3097200700026 abundances of Zr-94 to Zr-96 in natural Zr. 3097200700027 DETECTOR (NAICR,GE-IN) With the intrinsic Germanium detector 3097200700028 the relative activities of the Zr-95 samples and their 3097200700029 monitor foils were determined. For normalization 3097200700030 purposes absolute measurements were performed on the 3097200700031 sample with the highest activity, employing a NaI(Ti) 3097200700032 well-type detector. 3097200700033 ENDBIB 31 0 3097200700034 NOCOMMON 0 0 3097200700035 DATA 5 4 3097200700036 EN EN-ERR EN-RSL-HW DATA ERR-T 3097200700037 MEV MEV MEV MB MB 3097200700038 14.771 .013 .185 1506. 22. 3097200700039 14.341 .011 .090 1497. 26. 3097200700040 13.981 .010 .030 1489. 23. 3097200700041 13.495 .010 .115 1477. 26. 3097200700042 ENDDATA 6 0 3097200700043 ENDSUBENT 42 0 3097200799999 SUBENT 30972008 20090915 31413097200800001 BIB 4 9 3097200800002 INSTITUTE (2AUSIRK,3HUNKOS) 3097200800003 REACTION (39-Y-89(N,2N)39-Y-88,,SIG) 3097200800004 For results of analysis at KFI see subentry 30972005 3097200800005 DECAY-DATA (39-Y-88,106.64D,DG,898.04,.924, 3097200800006 DG,1836.06,.9930, 3097200800007 DG,2734.09,.0072) 3097200800008 DETECTOR (NAICR) The activities of the yttrium-oxide samples 3097200800009 were determined by integral counting with the NaI(Tl) 3097200800010 well-type detector. 3097200800011 ENDBIB 9 0 3097200800012 NOCOMMON 0 0 3097200800013 DATA 5 4 3097200800014 EN EN-ERR EN-RSL-HW DATA ERR-T 3097200800015 MEV MEV MEV MB MB 3097200800016 14.789 .014 .210 1009.8 14.3 3097200800017 14.476 .012 .120 945.8 14.2 3097200800018 14.132 .010 .054 872.6 12.0 3097200800019 13.586 .010 .092 703.6 10.8 3097200800020 ENDDATA 6 0 3097200800021 ENDSUBENT 20 0 3097200899999 ENDENTRY 8 0 3097299999999