ENTRY D4014 20060731 D048D401400000001 SUBENT D4014001 20060731 D048D401400100001 BIB 16 58 D401400100002 TITLE Excitation function of Nb-93(He-3,xn)Tc-93-m,g, D401400100003 Tc-94-m,g, Tc-95-m,g processes from threshold up to D401400100004 35 MeV: possibility of production of Tc-94-m in high D401400100005 radiochemical purity using a thermochromatographic D401400100006 separation technique D401400100007 AUTHOR (M.Fassbender,A.F.Novgorodov,F.Roesch,S.M.Qaim) D401400100008 INSTITUTE (2GERJUL).Institute fuer nuclearchemie D401400100009 EXP-YEAR (1994) D401400100010 REFERENCE (J,RCA,65,215,1994) D401400100011 FACILITY (ISOCY,2GERJUL) D401400100012 STATUS (TABLE) D401400100013 METHOD (ACTIV,STTA,EXTB,GSPEC) irradiation were done for 20 D401400100014 min or 90 min at 200 Na with 36 and 25 MeV incident D401400100015 energy of He3 beam. Beam current was measured using a D401400100016 faraday cup and via monitor reactions on Ti. The D401400100017 incident particle energies were checked by measuring D401400100018 the distance between two beam bunches (Z. Kormany, D401400100019 J,NIM,A337,258,94). The energy degradation along the D401400100020 stack was calculated according to C.F.Williamson et D401400100021 Al., Rapport CEA-R 3042 (1966). Decay data of reaction D401400100022 product were taken from E. Brownie and R.B. Fierstone, D401400100023 table of radioactive isotopes (V.S. Shirly, ed.) Wiley D401400100024 London, 1986 D401400100025 SAMPLE 10 stacks containing 8 to 10 of 5 and 10 microns of D401400100026 Nb foils (chemical purity greater than 99.99%), D401400100027 aluminum foils of 10 -100 microns as absorber and D401400100028 titanium monitor foils (13 microns) were irradiated. D401400100029 the foil diameter was 13 mm. D401400100030 MONITOR (22-TI-0(HE3,X)23-V-48,,SIG) D401400100031 MONIT-REF (,R.WEINREICH+,J,ARI,31,223,1980) D401400100032 DETECTOR (GELI).Dead time < 5%, source detector D401400100033 distance > 10 cm D401400100034 ADD-RES experimental determination of Tc isotopes present as D401400100035 impurities. Development of optimum conditions for a D401400100036 thermochromatic separation of technetium from the D401400100037 irradiated niobium target. D401400100038 ERR-ANALYS (EN-ERR).The uncertainties of the energy scale was D401400100039 estimated to increase from +- 0.2 Mev to +- 0.5 Mev D401400100040 with decreasing He-3 energy in the range of 36 MeV to D401400100041 15 MeV. D401400100042 (DATA-ERR).The total error of the cross sections was D401400100043 derived as the square root of the sum of square of the D401400100044 individual errors. D401400100045 -target mass 0.1% D401400100046 -irradiation 0.5% D401400100047 -detector efficiency including geometry 5% D401400100048 -decay data 0.5% D401400100049 -excitation function of monitor reactions 8% D401400100050 -counting statistics 1%-10% D401400100051 -peak area analysis 2%-5% D401400100052 the total error amounted to 50-100% near threshold in D401400100053 the case of Tc-95-m,g and 30% for the other products, D401400100054 REL-REF (N,A0347001,H.H.BISSEM+,J,PR/C,22,1468,1980) D401400100055 (N,,S.FLASH,R,KFK-43,2279,1976) D401400100056 (N,,L.T.AULER+,J,INC,43,2611,1981) D401400100057 HISTORY (19951025C) D401400100058 (19951101U) D401400100059 (20060730A) BIB section upgrated D401400100060 ENDBIB 58 0 D401400100061 NOCOMMON 0 0 D401400100062 ENDSUBENT 61 0 D401400199999 SUBENT D4014002 20060731 D048D401400200001 BIB 3 4 D401400200002 REACTION (41-NB-93(HE3,3N)43-TC-93-M,,SIG) D401400200003 RAD-DET (43-TC-93-M,DG) D401400200004 DECAY-DATA (43-TC-93-M,43.5MIN,DG,392.5,0.60, D401400200005 DG,2644.5,0.156) D401400200006 ENDBIB 4 0 D401400200007 NOCOMMON 0 0 D401400200008 DATA 4 30 D401400200009 EN EN-ERR DATA DATA-ERR D401400200010 MEV MEV MB MB D401400200011 35.0 0.4 8.2 0.9 D401400200012 34.2 0.4 6.9 0.8 D401400200013 32.7 0.4 7.3 0.8 D401400200014 31.9 0.4 8.6 1.0 D401400200015 30.9 0.4 13.9 1.6 D401400200016 30.4 0.4 10.2 1.2 D401400200017 30.1 0.4 13.6 1.6 D401400200018 29.5 0.4 12.7 1.5 D401400200019 28.4 0.4 19.9 2.4 D401400200020 27.5 0.2 21.2 2.5 D401400200021 26.1 0.2 25.0 3.1 D401400200022 25.6 0.2 28.2 3.5 D401400200023 24.3 0.2 32.8 4.3 D401400200024 23.9 0.2 35.6 4.6 D401400200025 23.8 0.2 37.4 5.0 D401400200026 23.5 0.3 37.0 4.3 D401400200027 23.3 0.3 33.4 4.5 D401400200028 23.2 0.3 27.0 3.8 D401400200029 23.0 0.3 33.9 4.1 D401400200030 22.7 0.3 27.0 4.3 D401400200031 22.5 0.3 32.9 3.9 D401400200032 22.2 0.3 28.0 5.6 D401400200033 21.9 0.3 33.7 4.0 D401400200034 21.7 0.3 33.0 8.3 D401400200035 21.4 0.3 29.8 6.0 D401400200036 20.6 0.3 34.0 10.2 D401400200037 20.0 0.3 31.4 6.3 D401400200038 19.4 0.3 30.6 6.1 D401400200039 17.3 0.3 9.9 1.2 D401400200040 16.1 0.3 0.5 0.1 D401400200041 ENDDATA 32 0 D401400200042 ENDSUBENT 41 0 D401400299999 SUBENT D4014003 20060731 D048D401400300001 BIB 4 11 D401400300002 REACTION (41-NB-93(HE3,3N)43-TC-93-G,,SIG) D401400300003 RAD-DET (43-TC-93-G,DG) D401400300004 DECAY-DATA (43-TC-93-G,2.75HR,DG,1363.1,0.66, D401400300005 DG,1520.3,0.239) D401400300006 COMMENT (by author).Direct production data. Contribution from D401400300007 the decay of 43-Tc-93m was separated. D401400300008 (by compiler). The separation of the contribution of D401400300009 decay of Tc-93m : sigma(Tc-93d)=sigma(Tc-93m+g)- D401400300010 0.8*Sigma(Tc-93m) is valid only at constant D401400300011 (independent of He-3 energy) isomeric ratio which is D401400300012 not supported by the obtained results. D401400300013 ENDBIB 11 0 D401400300014 NOCOMMON 0 0 D401400300015 DATA 4 41 D401400300016 EN EN-ERR DATA DATA-ERR D401400300017 MEV MEV MB MB D401400300018 35.0 0.4 206.8 22.7 D401400300019 34.2 0.4 238.9 26.3 D401400300020 32.7 0.4 260.5 28.7 D401400300021 31.9 0.4 308.7 35.0 D401400300022 30.9 0.4 341.0 39.2 D401400300023 30.4 0.4 339.8 39.1 D401400300024 30.1 0.4 390.0 46.8 D401400300025 29.5 0.4 380.2 43.7 D401400300026 28.4 0.4 408.0 49.0 D401400300027 27.5 0.2 447.0 53.6 D401400300028 26.1 0.2 434.0 54.3 D401400300029 25.6 0.2 457.0 57.1 D401400300030 24.3 0.2 550.0 71.5 D401400300031 23.9 0.2 448.0 58.2 D401400300032 23.8 0.2 421.0 56.8 D401400300033 23.5 0.3 448.0 51.5 D401400300034 23.3 0.3 407.0 54.9 D401400300035 23.2 0.3 370.0 51.8 D401400300036 23.0 0.3 412.1 49.5 D401400300037 22.7 0.3 347.0 55.5 D401400300038 22.5 0.3 375.5 45.1 D401400300039 22.2 0.3 347.0 69.4 D401400300040 21.9 0.3 369.6 44.4 D401400300041 21.7 0.3 323.0 80.8 D401400300042 21.4 0.3 305.8 61.2 D401400300043 20.6 0.3 272.0 81.6 D401400300044 20.0 0.3 218.0 43.6 D401400300045 19.4 0.3 177.6 35.5 D401400300046 19.1 0.3 209.0 73.2 D401400300047 18.9 0.3 170.0 20.4 D401400300048 18.8 0.3 139.6 34.9 D401400300049 18.5 0.3 168.0 67.2 D401400300050 18.2 0.3 102.0 25.5 D401400300051 17.9 0.3 140.0 16.8 D401400300052 17.7 0.3 81.0 24.3 D401400300053 17.3 0.3 108.0 13.0 D401400300054 17.2 0.3 95.3 23.8 D401400300055 16.7 0.3 72.0 8.6 D401400300056 16.4 0.3 29.0 3.5 D401400300057 16.1 0.3 47.0 5.6 D401400300058 15.9 0.3 6.0 2.4 D401400300059 ENDDATA 43 0 D401400300060 ENDSUBENT 59 0 D401400399999 SUBENT D4014004 20060731 D048D401400400001 BIB 4 10 D401400400002 REACTION (41-NB-93(HE3,2N)43-TC-94-M,,SIG) D401400400003 RAD-DET (43-TC-94-M,DG) D401400400004 DECAY-DATA (43-TC-94-M,52.MIN,DG,702.6,0.996, D401400400005 DG,992.8,0.023, D401400400006 DG,1868.3,0.057) D401400400007 COMMENT (by author).The intensity of the 871 keV gamma-ray D401400400008 emitted from the decay of the ground state was D401400400009 separated on the basis of the different half life and D401400400010 also on the measurements of the intensity of other D401400400011 gamma-rays D401400400012 ENDBIB 10 0 D401400400013 NOCOMMON 0 0 D401400400014 DATA 4 36 D401400400015 EN EN-ERR DATA DATA-ERR D401400400016 MEV MEV MB MB D401400400017 35.0 0.4 5.4 0.7 D401400400018 34.2 0.4 7.0 1.0 D401400400019 32.7 0.4 7.2 1.0 D401400400020 31.9 0.4 7.7 1.0 D401400400021 30.9 0.4 8.3 0.9 D401400400022 30.4 0.4 7.9 1.1 D401400400023 30.1 0.4 8.3 1.0 D401400400024 29.5 0.4 9.1 1.0 D401400400025 28.4 0.4 8.7 1.0 D401400400026 27.5 0.2 8.7 1.0 D401400400027 26.1 0.2 12.0 1.0 D401400400028 24.3 0.2 14.7 1.7 D401400400029 23.8 0.2 16.3 1.9 D401400400030 23.3 0.3 20.5 2.5 D401400400031 23.2 0.3 24.1 3.0 D401400400032 22.5 0.3 26.9 3.3 D401400400033 21.9 0.3 31.5 3.7 D401400400034 21.4 0.3 36.7 4.5 D401400400035 20.0 0.3 49.0 6.1 D401400400036 19.4 0.3 55.7 6.9 D401400400037 18.8 0.3 63.2 8.2 D401400400038 18.2 0.3 73.6 9.5 D401400400039 17.7 0.3 77.9 10.1 D401400400040 17.0 0.3 79.6 10.7 D401400400041 16.4 0.3 85.0 10.2 D401400400042 15.4 0.3 99.0 14.9 D401400400043 14.7 0.3 90.0 18.0 D401400400044 14.0 0.3 72.0 18.0 D401400400045 13.3 0.3 46.0 11.5 D401400400046 13.1 0.3 38.8 9.7 D401400400047 12.6 0.3 21.6 6.5 D401400400048 11.9 0.3 12.6 5.0 D401400400049 11.2 0.3 5.0 2.5 D401400400050 11.1 0.3 4.4 2.2 D401400400051 10.4 0.3 0.9 0.7 D401400400052 8.6 0.3 0.1 0.1 D401400400053 ENDDATA 38 0 D401400400054 ENDSUBENT 53 0 D401400499999 SUBENT D4014005 20060731 D048D401400500001 BIB 4 10 D401400500002 REACTION (41-NB-93(HE3,2N)43-TC-94-G,,SIG) D401400500003 RAD-DET (43-TC-94-G,DG) D401400500004 DECAY-DATA (43-TC-94-G,4.9HR,DG,702.6,0.996, D401400500005 DG,849.7,0.958, D401400500006 DG,871.1,0.999) D401400500007 COMMENT (by author).The intensity of the 871 keV gamma-ray D401400500008 emitted from the decay of the isomer state was D401400500009 separated on the basis of the different half life and D401400500010 also on the measurements of the intensity of other D401400500011 gamma-rays D401400500012 ENDBIB 10 0 D401400500013 NOCOMMON 0 0 D401400500014 DATA 4 36 D401400500015 EN EN-ERR DATA DATA-ERR D401400500016 MEV MEV MB MB D401400500017 35.0 0.4 21.8 2.9 D401400500018 34.2 0.4 21.7 2.9 D401400500019 32.7 0.4 24.8 3.2 D401400500020 31.9 0.4 27.5 3.5 D401400500021 30.9 0.4 30.5 3.6 D401400500022 30.4 0.4 35.8 4.2 D401400500023 30.1 0.4 32.0 4.0 D401400500024 29.5 0.4 33.7 4.2 D401400500025 28.4 0.4 41.4 5.1 D401400500026 27.5 0.2 51.1 6.1 D401400500027 26.1 0.2 60.1 7.2 D401400500028 25.6 0.2 71.0 8.5 D401400500029 24.3 0.2 85.0 10.2 D401400500030 23.8 0.2 81.8 9.8 D401400500031 23.3 0.3 95.1 11.8 D401400500032 23.2 0.3 105.6 13.2 D401400500033 22.5 0.3 117.6 14.7 D401400500034 21.9 0.3 131.1 15.7 D401400500035 21.4 0.3 142.3 17.8 D401400500036 20.0 0.3 176.4 22.0 D401400500037 19.4 0.3 190.4 23.8 D401400500038 18.8 0.3 199.0 25.9 D401400500039 18.2 0.3 197.7 25.7 D401400500040 17.7 0.3 192.2 25.0 D401400500041 17.0 0.3 179.3 24.2 D401400500042 15.4 0.3 170.0 25.5 D401400500043 14.7 0.3 140.0 28.0 D401400500044 14.0 0.3 91.0 22.7 D401400500045 13.3 0.3 59.0 14.7 D401400500046 13.1 0.3 42.8 10.7 D401400500047 12.6 0.3 24.7 7.4 D401400500048 11.9 0.3 12.1 4.8 D401400500049 11.2 0.3 5.0 2.5 D401400500050 11.1 0.3 4.3 2.1 D401400500051 10.4 0.3 1.0 0.8 D401400500052 8.6 0.3 0.1 0.1 D401400500053 ENDDATA 38 0 D401400500054 ENDSUBENT 53 0 D401400599999 SUBENT D4014006 20060731 D048D401400600001 BIB 3 4 D401400600002 REACTION (41-NB-93(HE3,N)43-TC-95-M,,SIG) D401400600003 RAD-DET (43-TC-95-M,DG) D401400600004 DECAY-DATA (43-TC-95-M,61.D,DG,204.1,0.662, D401400600005 DG,582.1,0.314) D401400600006 ENDBIB 4 0 D401400600007 NOCOMMON 0 0 D401400600008 DATA 4 11 D401400600009 EN EN-ERR DATA DATA-ERR D401400600010 MEV MEV MB MB D401400600011 35.0 0.4 0.3 0.1 D401400600012 30.9 0.4 0.3 0.1 D401400600013 28.3 0.4 0.4 0.1 D401400600014 21.5 0.3 0.6 0.2 D401400600015 18.9 0.3 0.7 0.2 D401400600016 16.4 0.3 0.8 0.2 D401400600017 15.4 0.3 0.7 0.2 D401400600018 14.7 0.3 0.8 0.3 D401400600019 14.0 0.3 0.6 0.3 D401400600020 13.3 0.3 0.5 0.3 D401400600021 11.2 0.3 0.1 0.3 D401400600022 ENDDATA 13 0 D401400600023 ENDSUBENT 22 0 D401400699999 SUBENT D4014007 20060731 D048D401400700001 BIB 4 6 D401400700002 REACTION (41-NB-93(HE3,N)43-TC-95-G,,SIG) D401400700003 RAD-DET (43-TC-95-G,DG) D401400700004 DECAY-DATA (43-TC-95-G,20.HR,DG,765.8,0.94, D401400700005 DG,947.7,0.02) D401400700006 COMMENT (by compiler).No comment was given by the author on D401400700007 the separation of the isomeric state D401400700008 ENDBIB 6 0 D401400700009 NOCOMMON 0 0 D401400700010 DATA 4 26 D401400700011 EN EN-ERR DATA DATA-ERR D401400700012 MEV MEV MB MB D401400700013 35.0 0.4 1.8 0.4 D401400700014 34.2 0.4 1.9 0.4 D401400700015 33.4 0.4 1.8 0.4 D401400700016 31.8 0.4 2.0 0.4 D401400700017 30.9 0.4 2.3 0.5 D401400700018 30.1 0.4 2.2 0.4 D401400700019 29.2 0.4 2.3 0.3 D401400700020 28.3 0.4 2.4 0.4 D401400700021 26.6 0.2 2.4 0.4 D401400700022 25.7 0.2 2.9 0.4 D401400700023 24.7 0.2 2.9 0.4 D401400700024 23.6 0.2 3.0 0.5 D401400700025 22.6 0.3 3.2 0.5 D401400700026 21.5 0.3 3.3 0.5 D401400700027 20.4 0.3 3.4 0.5 D401400700028 19.2 0.3 3.4 0.5 D401400700029 18.9 0.3 3.5 0.5 D401400700030 18.0 0.3 3.5 0.5 D401400700031 17.7 0.3 4.0 0.6 D401400700032 16.4 0.3 3.9 0.6 D401400700033 15.4 0.3 3.9 0.6 D401400700034 14.7 0.3 3.7 0.7 D401400700035 14.0 0.3 3.0 0.7 D401400700036 13.3 0.3 2.5 0.8 D401400700037 11.2 0.3 0.6 0.2 D401400700038 10.4 0.3 0.2 0.1 D401400700039 ENDDATA 28 0 D401400700040 ENDSUBENT 39 0 D401400799999 ENDENTRY 7 0 D401499999999