ENTRY O1354 20060414 O026O135400000001 SUBENT O1354001 20060414 O026O135400100001 BIB 14 47 O135400100002 TITLE Production of Np-235, Pu-236 and Pu-237 via nuclear O135400100003 reactions on U-235,236,238 and Np-237 targets. O135400100004 AUTHOR (J.Aaltonen, P.Dendooven, E.A.Gromova, S.J.Heselius, O135400100005 V.A.Jakovlev, W.Trzaska) O135400100006 INSTITUTE (2SF HLS) O135400100007 (2SF JYV) O135400100008 (4RUSRI) O135400100009 (2SF ABA) O135400100010 REFERENCE (J,RCA,91,557,2003) O135400100011 HISTORY (20060225C) O135400100012 (20060414U) Last checking has been done. O135400100013 SAMPLE Targets of uranium and neptunium-oxide (236,238U(3)O(8)O135400100014 and 237Np-O(2)) were prepared by multiple thermal O135400100015 decomposition of uranium or neptunium nitrate celluloseO135400100016 painted on 10-mum, 50-mum and 100-mum thick Al-backing.O135400100017 The average thickness of the actinide layer was 60-120 O135400100018 mug/cm**2 for the thin targets and 1.5-2-mg/cm**2 for O135400100019 the thick targets. The thickness variations were withinO135400100020 3% for all types of targets used. O135400100021 ADD-RES (TTY-C).The calculated thick-target yield of Np-235 O135400100022 at 42.4-MeV projectile energy is 5.8-kbq/mua*hr. O135400100023 FACILITY (CYCLO,2SF JYV) The K-130 cyclotron . O135400100024 (ISOCY,2SF ABA) The 103-cm AVF cyclotron - MGC-20 O135400100025 METHOD (BCINT) O135400100026 (STTA) O135400100027 (CHSEP) O135400100028 DETECTOR (SIBAR) For alpha activity of Pu-236 and Pu-238. O135400100029 The energy resolution of the alpha spectrometers was O135400100030 20-35-KeV at 5767-KeV. The efficiency errors were 3- O135400100031 6%, but as a results of the negative covariance O135400100032 coefficients the error of the efficiency ratio was O135400100033 less than 1% for all alpha detector assemblies. O135400100034 (GELI) And hpge-detector for X-ray activity of Np-235 O135400100035 and Pu-237. Gamma spectra were measured with energy O135400100036 resolutions of 1.8-KeV at 1332.5-KeV. The error of theO135400100037 gamma detector efficiency was about 2%. O135400100038 COMMENT -By authors. For all measurements the induced alpha O135400100039 activities were normalized with the target material O135400100040 alpha emission. O135400100041 CORRECTION The dead time correction was automatically taken into O135400100042 account with normalization procedure. O135400100043 ERR-ANALYS (DATA-ERR).The uncertainty is reported by authors. TheO135400100044 uncertainties of the detector surface area and the O135400100045 distance between the detector and the sample give the O135400100046 main contribution to the efficiency error. O135400100047 (EN-ERR).The uncertainty is reported by authors. O135400100048 STATUS (APRVD) By V.A.Jakovlev 13-04-2003 O135400100049 ENDBIB 47 0 O135400100050 NOCOMMON 0 0 O135400100051 ENDSUBENT 50 0 O135400199999 SUBENT O1354002 20060414 O026O135400200001 BIB 1 1 O135400200002 REACTION (92-U-236(HE3,X)93-NP-234,,SIG) O135400200003 ENDBIB 1 0 O135400200004 NOCOMMON 0 0 O135400200005 DATA 4 6 O135400200006 EN EN-ERR DATA DATA-ERR O135400200007 MEV MEV MB MB O135400200008 42.3 0.2 1.41 0.2 O135400200009 46.3 0.3 1.42 0.16 O135400200010 49.6 0.2 2.32 0.65 O135400200011 53. 0.2 2.3 0.18 O135400200012 56.3 0.2 2.03 0.18 O135400200013 59.4 0.2 2.22 0.2 O135400200014 ENDDATA 8 0 O135400200015 ENDSUBENT 14 0 O135400299999 SUBENT O1354003 20060414 O026O135400300001 BIB 2 2 O135400300002 REACTION (92-U-236(HE3,X)93-NP-235,,SIG) O135400300003 DECAY-DATA (93-NP-235,396.1D) O135400300004 ENDBIB 2 0 O135400300005 NOCOMMON 0 0 O135400300006 DATA 4 4 O135400300007 EN EN-ERR DATA DATA-ERR O135400300008 MEV MEV MB MB O135400300009 46.3 0.3 12.5 2.9 O135400300010 53. 0.2 12. 2.8 O135400300011 56.3 0.2 9.3 1.7 O135400300012 59.4 0.2 11.4 2. O135400300013 ENDDATA 6 0 O135400300014 ENDSUBENT 13 0 O135400399999 ENDENTRY 3 0 O135499999999