ENTRY O0770 20191004 O071O077000000001 SUBENT O0770001 20191004 O071O077000100001 BIB 13 43 O077000100002 TITLE Proton-induced nuclear reactions in neptunium-237 O077000100003 targets. Production of plutonium tracers in the energy O077000100004 range 15-40 MeV. O077000100005 AUTHOR (J.Aaltonen,E.A.Gromova,V.Jakovlev,S.J.Heselius, O077000100006 P.Dendooven,W.Trzaska) O077000100007 REFERENCE (J,RCA,88,129,2000) O077000100008 INSTITUTE (2SF HLS,4RUSRI ,2SF ABA,2SF JYV) O077000100009 FACILITY (CYCLO,2SF JYV) A 40.1-MeV proton beam of the K-130 O077000100010 Cyclotron for the thin target. O077000100011 (CYCLO,2SF ABA) A 17-MeV proton beam 103-Cm Avf O077000100012 Cyclotron for the thick targets. O077000100013 SAMPLE Targets of neptunium oxide (NpO(2)) were prepared by O077000100014 multiple thermal decomposition of neptunium nitrate O077000100015 cellulose painted on 10 mum and 50 mum thick aluminum O077000100016 backings. The average thickness of the Np-237O(2) layerO077000100017 was 120 mug/cm**2 for the thin targets and 2 mg/cm**2 O077000100018 for the thick targets. The thickness variations were O077000100019 within 3% for both types of targets. The average O077000100020 thicknesses were determined by weighing. O077000100021 DETECTOR (SIBAR) The alpha-activity of Pu-236 was measured with O077000100022 surface-barrier silicon detectors with sensitive areas O077000100023 of 200-mm**2 and an energy resolution of 30-keV at O077000100024 5767-keV. O077000100025 METHOD (BCINT) The beam current on the thin target was O077000100026 approximatelly 1 muA. For the thick target the beam O077000100027 current was 7 muA. O077000100028 (ACTIV) The irradiation time was about 5 hours for thinO077000100029 target and 10 hours for thick target. O077000100030 (CHSEP) O077000100031 (STTA) Eight pairs of 237-Np oxide targets of 120 mu-g O077000100032 and aluminium foils of different thicknesses were O077000100033 mounted in a multiple target system. O077000100034 (EXTB) O077000100035 ANALYSIS (DECAY) O077000100036 ADD-RES (TTY-C) O077000100037 Yields and radiochemical purity of 236-Pu and 237-Pu inO077000100038 various reactions. O077000100039 ERR-ANALYS (ERR-T) Total uncertainty O077000100040 STATUS (TABLE) Tbl.4 from Radiochim.Acta 88(2000)129 O077000100041 HISTORY (20000906C) O077000100042 (20000915U) Last checking has been done. O077000100043 (20010323A) DATE is corrected O077000100044 (20191004A) SD: Major corrections in all Subents. O077000100045 ENDBIB 43 0 O077000100046 NOCOMMON 0 0 O077000100047 ENDSUBENT 46 0 O077000199999 SUBENT O0770002 20191004 O071O077000200001 BIB 7 22 O077000200002 REACTION (93-NP-237(P,N)94-PU-237,,SIG) O077000200003 DECAY-DATA (94-PU-237-G,45.13D,DG,97.069,0.137,DG,101.057,0.218) O077000200004 DETECTOR (GELI) Ge(LI)-detectors with energy resolution of 2.0- O077000200005 keV at 1332.5-keV. O077000200006 ANALYSIS The cross sections of 237Np(p,n)237Pu reaction O077000200007 were determined relatively to the 236Pu cumulutive O077000200008 formation cross section, using it as a reference O077000200009 between alpha and gamma measurements respective O077000200010 emission peaks of 237Np O077000200011 ERR-ANALYS (ERR-1,1.9,42.) Uncertainty in the ratio of the O077000200012 237Pu to 237Np respective gamma-peak counts O077000200013 (ERR-2) Uncertainty in the ratio of the 237Np to 237Pu O077000200014 products of gamma-peak efficiency and intensity O077000200015 (ERR-3,1.5,3.5) Uncertainty in the ratio of the O077000200016 237Np to 236Pu alpha-peak counts O077000200017 (ERR-4) Total uncertainty of the 236Pu cumulutive O077000200018 formation cross section O077000200019 (ERR-5) Uncertainty in the ratio of time of irradiationO077000200020 STATUS (COREL,O0770005) cumulutive formation cross section O077000200021 (see ANALYSIS) O077000200022 HISTORY (20191004A) SD: Values updated according presentation O077000200023 in the table. DETECTOR, ANALYSIS, ERR-ANALYS added. O077000200024 ENDBIB 22 0 O077000200025 COMMON 3 3 O077000200026 ERR-2 ERR-4 ERR-5 O077000200027 PER-CENT PER-CENT PER-CENT O077000200028 4.7 3.8 0.32 O077000200029 ENDCOMMON 3 0 O077000200030 DATA 4 7 O077000200031 EN EN-ERR DATA ERR-T O077000200032 MEV MEV MB MB O077000200033 15.9 0.6 5.61 0.58 O077000200034 16.5 0.2 6.65 0.48 O077000200035 20.0 0.5 5.87 0.42 O077000200036 23.5 0.4 5.45 0.36 O077000200037 26.6 0.4 4.82 0.34 O077000200038 32.0 0.3 4.48 1.93 O077000200039 39.4 0.2 5.09 0.34 O077000200040 ENDDATA 9 0 O077000200041 ENDSUBENT 40 0 O077000299999 SUBENT O0770003 20191004 O071O077000300001 BIB 5 20 O077000300002 REACTION (93-NP-237(P,X)93-NP-236-M,,SIG) O077000300003 RAD-DET (93-NP-236-M,B-) O077000300004 (94-PU-236,A) O077000300005 DECAY-DATA (93-NP-236-M,22.5HR,B-,537.,0.47,B+,984.,0.53) O077000300006 (94-PU-236,2.851YR,A,5753.2,1.) daughter Np-236. O077000300007 ERR-ANALYS (ERR-1) Uncertainty in the target thickness O077000300008 (ERR-2,,1.) Uncertainty in the integrated charge of O077000300009 the proton beam O077000300010 (ERR-3,2.3,3.5) Uncertainty in the ratio of the O077000300011 236Pu to 237Np alpha-peak counts O077000300012 (ERR-4) Uncertainty in the neptunium target area O077000300013 (ERR-5) Uncertainty in the ratio of registration O077000300014 efficiencies (solid angles) of 236Pu to 237Np alphas O077000300015 (ERR-6) Uncertainty in the 237Np decay constant O077000300016 (ERR-7) Uncertainty in the 236Pu decay constant O077000300017 (ERR-8) Uncertainty in the 236Np decay constant O077000300018 (ERR-9) Uncertainty in the branching ratio of O077000300019 236mNp decay O077000300020 HISTORY (20191004A) SD: Values updated according presentation O077000300021 in the table. ERR-ANALYS added. O077000300022 ENDBIB 20 0 O077000300023 COMMON 7 6 O077000300024 ERR-1 ERR-4 ERR-5 ERR-6 ERR-7 ERR-8 O077000300025 ERR-9 O077000300026 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT O077000300027 PER-CENT O077000300028 3. 0.14 2. 0.17 0.28 1.8 O077000300029 2.1 O077000300030 ENDCOMMON 6 0 O077000300031 DATA 4 9 O077000300032 EN EN-ERR DATA ERR-T O077000300033 MEV MEV MB MB O077000300034 15.9 0.6 13.1 0.8 O077000300035 20.0 0.5 39.6 2.1 O077000300036 23.5 0.4 69.1 3.6 O077000300037 26.6 0.4 81.8 4.3 O077000300038 29.4 0.3 94.0 5.0 O077000300039 32.0 0.3 81.4 4.3 O077000300040 34.5 0.3 86.3 4.5 O077000300041 36.8 0.2 81.0 4.2 O077000300042 39.6 0.2 85.8 4.5 O077000300043 ENDDATA 11 0 O077000300044 ENDSUBENT 43 0 O077000399999 SUBENT O0770004 20191004 O071O077000400001 BIB 4 15 O077000400002 REACTION (93-NP-237(P,2N)94-PU-236,,SIG) O077000400003 DECAY-DATA (94-PU-236,2.851YR,A,5753.2,1.) O077000400004 ERR-ANALYS (ERR-1) Uncertainty in the target thickness O077000400005 (ERR-2,,1.) Uncertainty in the integrated charge of O077000400006 the proton beam O077000400007 (ERR-3,2.3,3.5) Uncertainty in the ratio of the O077000400008 236Pu to 237Np alpha-peak counts O077000400009 (ERR-4) Uncertainty in the neptunium target area O077000400010 (ERR-5) Uncertainty in the ratio of registration O077000400011 efficiencies (solid angles) of 236Pu to 237Np alphas O077000400012 (ERR-6) Uncertainty in the 237Np decay constant O077000400013 (ERR-7) Uncertainty in the 236Pu decay constant O077000400014 HISTORY (20191004A) SD: SF5=IND deleted from REACTION code. O077000400015 Values updated according presentation in the table. O077000400016 ERR-ANALYS added. O077000400017 ENDBIB 15 0 O077000400018 COMMON 5 3 O077000400019 ERR-1 ERR-4 ERR-5 ERR-6 ERR-7 O077000400020 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT O077000400021 3. 0.14 2. 0.17 0.28 O077000400022 ENDCOMMON 3 0 O077000400023 DATA 4 9 O077000400024 EN EN-ERR DATA ERR-T O077000400025 MEV MEV MB MB O077000400026 15.9 0.6 8.33 0.32 O077000400027 20.0 0.5 5.61 0.22 O077000400028 23.5 0.4 4.35 0.17 O077000400029 26.6 0.4 5.07 0.21 O077000400030 29.4 0.3 6.07 0.27 O077000400031 32.0 0.3 4.67 0.20 O077000400032 34.5 0.3 6.78 0.27 O077000400033 36.8 0.2 3.54 0.15 O077000400034 39.6 0.2 4.26 0.18 O077000400035 ENDDATA 11 0 O077000400036 ENDSUBENT 35 0 O077000499999 SUBENT O0770005 20191004 O071O077000500001 BIB 5 18 O077000500002 REACTION (93-NP-237(P,X)94-PU-236,CUM,SIG) O077000500003 COMMENT Cumulutive formation of Pu-236 in the reactions O077000500004 Np-237(p,2n)Pu-236 and O077000500005 Np-237(p,pn+d)Np-236m -> (B-) -> Pu-236. O077000500006 DECAY-DATA (94-PU-236,2.851YR,A,5753.2,1.) It is Daughter Np-236. O077000500007 ERR-ANALYS (ERR-1) Uncertainty in the target thickness O077000500008 (ERR-2,,1.) Uncertainty in the integrated charge of O077000500009 the proton beam O077000500010 (ERR-3,2.3,3.5) Uncertainty in the ratio of the O077000500011 236Pu to 237Np alpha-peak counts O077000500012 (ERR-4) Uncertainty in the neptunium target area O077000500013 (ERR-5) Uncertainty in the ratio of registration O077000500014 efficiencies (solid angles) of 236Pu to 237Np alphas O077000500015 (ERR-6) Uncertainty in the 237Np decay constant O077000500016 (ERR-7) Uncertainty in the 236Pu decay constant O077000500017 HISTORY (20191004A) SD: SF3=2N -> X in REACTION code. Values O077000500018 updated according presentation in the table. O077000500019 ERR-ANALYS added. O077000500020 ENDBIB 18 0 O077000500021 COMMON 5 3 O077000500022 ERR-1 ERR-4 ERR-5 ERR-6 ERR-7 O077000500023 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT O077000500024 3. 0.14 2. 0.17 0.28 O077000500025 ENDCOMMON 3 0 O077000500026 DATA 4 9 O077000500027 EN EN-ERR DATA ERR-T O077000500028 MEV MEV MB MB O077000500029 15.9 0.6 14.5 0.6 O077000500030 20.0 0.5 24.2 0.9 O077000500031 23.5 0.4 36.8 1.4 O077000500032 26.6 0.4 43.5 1.7 O077000500033 29.4 0.3 50.3 1.9 O077000500034 32.0 0.3 42.9 1.6 O077000500035 34.5 0.3 47.3 1.8 O077000500036 36.8 0.2 41.6 1.6 O077000500037 39.6 0.2 44.6 1.7 O077000500038 ENDDATA 11 0 O077000500039 ENDSUBENT 38 0 O077000599999 ENDENTRY 5 0 O077099999999